One Good Turn: A Natural History of the Screwdriver and the Screw

Overview

The seeds of Witold Rybczynski's elegant and illuminating new book were sown by The New York Times, whose editors asked him to write an essay identifying "the best tool of the millennium." The award-winning author of Home: A Short History of an Idea and, most recently, A Clearing in the Distance: Frederick Law Olmsted and America in the Nineteenth Century, Rybczynski once built a house using only hand tools. His intimate knowledge of the toolbox?both its contents and its ...
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One Good Turn: A Natural History of the Screwdriver and the Screw

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Overview

The seeds of Witold Rybczynski's elegant and illuminating new book were sown by The New York Times, whose editors asked him to write an essay identifying "the best tool of the millennium." The award-winning author of Home: A Short History of an Idea and, most recently, A Clearing in the Distance: Frederick Law Olmsted and America in the Nineteenth Century, Rybczynski once built a house using only hand tools. His intimate knowledge of the toolbox—both its contents and its history—serves him beautifully on his quest.

One Good Turn is a story starring Archimedes, who invented the water screw and introduced the helix, and Leonardo, who sketched a machine for carving wood screws. It is a story of mechanical discovery and genius that takes readers from Ancient Greece to Victorian Glasgow, from weapons design in the Italian Renaissance to car design in the age of American industry. Rybczynski writes an ode to the screw, without which there would be no telescope, no microscope—in short, no enlightenment science. The screwdriver, perhaps the last hand tool in a world gone cyber, represents nothing less than the triumph of precision.

One of our finest cultural and architectural historians, Rybczynski renders a graceful, original, and engaging portrait of the tool that changed the course of civilization.

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Editorial Reviews

From Barnes & Noble
Our Review
This charming little book by the author of Home and A Clearing in the Distance came out of an assignment Rybczynski took on for The New York Times Magazine. During millennial fever, all sorts of "best-of" lists were being compiled. Rybczynski's project was "The Best Tool of the Millennium," a more difficult task than it might seem at first glance because so many of our standard tools were invented long before the year A.D.1000. For example, the screw was mentioned in a text dated to A.D. 66, in the context of a screw press (for processing grapes and olives), so this familiar item alone could actually qualify as the best tool of the last two millennia. The first half of One Good Turn chronicles Rybczynski's quest for the earliest mention of the screwdriver, while the second half is a history of its predecessor.

Rybczynski's quest for the origins of the screwdriver initially ran into several dead ends. References, such as the venerable Encyclopaedia Britannica, dated the screwdriver to 1800. This relatively late date intrigues Rybczynski, and his book turns into a detective story of sorts, filled with musty tomes showing medieval contraptions held together by screws with slotted heads -- a simple deduction being that where there are screws there must be screwdrivers. At first, terminology is the problem. The word "screwdriver" makes a late appearance because the tool was previously known by the name "turnscrew," perhaps a translation of the French tournevis. Rybczynski sets his sights on France and pushes back the first mention to the mid-18th century. This date doesn't satisfy, though, because the tool looks too "finished" to be the very first screwdriver. The 1556 text De Re Metallica is clearly illustrated with a slotted-head screw. Then the idea occurs to Rybczynski that warfare has traditionally been the mother of invention. At last he finds an example with the oldest screw in the Metropolitan Museum of Art in New York. It is on a piece of 15th-century armor. So the screwdriver is at least 500 years old. But tools, such as presses, that use the screw shape are much older and widely used. The ancient Romans even had linen presses. So who invented the screw? The concept of a screw is not intuitively obvious like other tools, such as a saw. As Rybczynski points out, the water screws of the 2nd century B.C. represent perhaps the first human creation of a helix. Rybczynski posits that it was the great mathematician Archimedes (of "Eureka!" fame) who is credited with the invention of the water screw and who therefore should be known as the Father of the Screw -- perhaps a greater leap of imagination than has been recognized by posterity.

-- Laura Wood, Science & Nature Editor

Jonathan Yardley
...a slender, informative and thoroughly charming book....In this as in virtually everything else he has written, Rybczynski himself reveals a gift that is itself no mean thing: for getting to the heart of the matter.
Washington Post
Library Journal
What a delightful book! Who would have guessed that something as ordinary and useful as the screwdriver and the screw would also be so fascinating. When asked by the New York Times Magazine to write an essay on the best tool of the past thousand years, cultural historian Rybczynski (A Clearing in the Distance) struggled to find one, as most tools are far older, until he hit upon the screwdriver and the screw (although these instruments also may have mysterious origins that precede the millennium). In his trademark clear, elegant prose, Rybczynski traces the history of the screwdriver and screw from Hero's screw press and Archimedes' water screw to the 20th century's Phillips head. Home craftspeople, artists, history buffs, and engineers will delight in the story he tells--how such humble tools influenced society. Rybczynski points out that in the hands of mechanical geniuses like Henry Maudslay (1771-1831), the ability to fully exploit the screw led directly to precision tool making and the resulting enormous strides in building steam engines, railroads, bridges, etc. In writing this book, Rybczynski draws from art, literature, history, and engineering; readers will find themselves checking, as did Rybczynski, the details of illustrations and paintings for further clues. Highly recommended for all collections. [Previewed in Prepub Alert, LJ 5/1/00.]--Michael D. Cramer, Raleigh, NC Copyright 2000 Cahners Business Information.\
From The Critics
The New York Times asked this author to write an essay identifying the 'best tool of the millennium' the result was this celebration of the screwdriver, a survey which shows how the invention and applications of the screwdriver changed the course of history. Black and white illustrations compliment a lively history.
M.R. Montgomery
[M]idway through the book, the fascinating digressions [begin]. . . . Rybczynski argues convincingly that the application of helical adjustment is one of the core principles of the Industrial Revolution.
The New York Times Book Review
Kirkus Reviews
As much as Frederick Law Olmstead, the hero of Rybczynski's acclaimed previous effort (A Clearing in the Distance, 1999), changed the face of America, the subject of his new study has changed the world.
From the Publisher
M. R. Montgomery The New York Times Book Review What Rybczynski sees is that everything that requires mechanical precision, and that includes the instrumentation of modern science, rises out of the perfection of the simple screw and the complex machinery required to manufacture these indispensable items.

Paul Challen The Toronto Star One Good Turn is a good, short read in the classic Rybczynksi mode — an ordinary thing, explained extraordinarily.

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Product Details

  • ISBN-13: 9780613920377
  • Publisher: San Val
  • Publication date: 9/28/2001
  • Format: Library Binding
  • Pages: 173
  • Product dimensions: 5.00 (w) x 7.50 (h) x 0.70 (d)

Meet the Author

Witold Rybczynski, born in Edinburgh, raised in Canada, and currently living in Philadelphia, is the Meyerson Professor of Urbanism at the University of Pennsylvania. He has written on architecture and urbanism for The New York Times, The Atlantic, The New Yorker and Slate, and is the author of the critically acclaimed Home and the A Clearing in the Distance, a biography of frederick Law Olmsted, for which he was awarded the J. Anthony Lukas Prize. He is the recipient of the National Building Museum’s 2007 Vincent Scully Prize.

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Read an Excerpt

Chapter 1

The Carpenter's Toolbox

This all starts with a telephone call from David Shipley, an editor at the New York Times. Would I write an article for a special millennium issue of the Sunday magazine? he asks. The end of the millennium is on many magazine editors' minds, and I have had a number of such requests. Shipley explains that the theme of the issue is The Best of the Millennium. That sounds interesting. "What do you want me to write about?" I ask.

"We're hoping that you can write a short essay about the best tool," he answers.

I am a bit let down. The best tool is hardly as weighty a subject as the best architect or the best city, topics I could really sink my teeth into. still, I have been working on a long biography and would welcome a break. Writing about the best tool of the millennium might even be fun.

While David Shipley is speaking, I compose the essay in my head. There is so much to choose from: paper clips, fountain pens, eyeglasses. I have recently seen a portrait in the Pennsylvania Academy of the Fine Arts of Benjamin Franklin wearing round spectacles, a reminder that Franklin was the inventor of the bifocal. Yet eyeglasses are much older than the eighteenth century. The first reference to eyeglasses is in a sermon given by a Dominican friar in Florence in 1306. He mentions that eyeglasses were invented twenty years earlier, and that he has even spoken with the inventor, although he neglects to give his name. Medieval eyeglasses were only for farsighted people and were used for reading and writing. They were the first practical application of the new science of optics, paving the way for such far-reaching inventions as the telescope and the microscope. A key influence on literacy, astronomy, and biology, eyeglasses surely qualify as "the best tool of the millennium." This is going to be easy.

However, when I mention my idea to David, it becomes clear that he has something else in mind. He means tool in the literal sense — a handsaw or a hammer. So, not eyeglasses. He must hear the disappointment in my voice, and he points out that I once wrote a book about building my own house. That might make a good starting point, he suggests helpfully. All right, I say, I'll think about it.

In my case, "building my own house" meant actually building it. My wife and I, with the occasional help of friends, mixed concrete, sawed wood, plastered walls, and installed plumbing. We did everything ourselves except the electrical wiring. Ever since my boyhood experiences with recalcitrant train sets, I have been thwarted by electricity. Despite my father's patient explanations — he was an electrical engineer — and a college physics course, I never grasped the relationship between voltage, current, and resistance. Electricity, in fact, was a problem in our house-building project — there was none. We were building on a rural site about eight hundred feet from the road, and although we planned to bring in power, initially we could not afford the cost of a temporary line. Renting a gas-powered generator would be expensive, too — and noisy. I decided to build the framing and exterior of the house by hand. Once the basic structure was finished, which promised to take a year or two, we would bring in a line and hire a professional to install the electrical wiring.

Does one of my carpenter's tools qualify as the millennium's best? I discount power tools. I had used a portable circular saw, a drill, and a sander for finishing and cabinetwork, but these are chiefly loborsaving devices. Not that productivity isn't important. Ken Kern, the author of The Owner-Built Home, estimates that cutting all the two-by-fours for the frame of a small house would take seven full days using a handsaw, and only thirty minutes using a power saw. I appreciate the ease of cutting wood with power tools, but the result, while more quickly arrived at, is no different than if I use a handsaw. In any case, I enjoy working with my hands. One of the rewards of building something yourself — a house or a bookshelf — is the pleasure of using tools. Hand tools are true extensions of the human body, for they have evolved over centuries of trial and error. Power tools are more convenient, of course, but they lack precisely that sense of refinement. No doubt, if I spent my life hammering nails, I would feel differently about the, virtues of a nail gun, say. Yet increasing the productivity of carpenters does not seem to me in the same category as the invention of entirely new devices such as eyeglasses.

That leaves my box of hand tools. The tools required for the construction of a small wood-frame house fall roughly into four categories: measurement, cutting and shaping, hammering, and drilling. My measuring tools include a try square, a bevel, a chalk line, a plumb bob, a spirit level, and a tape measure. A little reading informs me that almost all these tools predate our millennium; indeed, most predate the first millennium of the Christian age. A Roman builder, or mensor aedificorum, was familiar with the try square, the plumb line, and the chalk line — all tools that were developed by the ancient Egyptians. The level, or libella, also an Egyptian invention, consisted of a wood frame resembling the letter A, with a plumb bob suspended from the apex. To level, the string was lined up with a mark in the center of the crossbar. Not as compact as my spirit level, perhaps, but obviously just as serviceable since A-levels continued to be used until the mid-1800s. The spirit level, with its sealed tube containing an air bubble floating in alcohol, was invented in the mid-1600s. It was first exclusively a surveying instrument — it took another two hundred years to find its way into the carpenter's toolbox. For measuring length, the Roman mensor used a regula, or a wooden stick divided into feet, palms, twelfths or unciae (whence our inches), and digiti or finger widths. I have a yardstick, too, but most of my measuring is done with a retractable steel tape. That, at least, would impress ray Roman counterpart, whose only compact measuring device was a one-foot bronze folding rule. Oak yardsticks were used in the Middle Ages, and folding rules, in ivory, brass, or boxwood, reappeared in the eighteenth century I can't find the origins of the tape measure, but I would guess that it was developed sometime in the late 1800s. I would be lost. without my twenty-five-foot retractable tape measure, but it does not seem to me to qualify as the best tool of the millennium.

I own several saws. The handsaw, too, is an ancient tool: archaeologists have found metal-toothead Egyptian saws dating back to 1500 B.C. They have broad blades, some as long as twenty inches, curved wooden handles, and irregular teeth. The blades are copper, a soft metal. To keep the blade from buckling, the Egyptian saw was pulled — not pushed. Pulling is less effective than pushing, since the carpenter cannot bear down on the cutting stroke, and sawing wood must have been a slow and laborious process. The Romans made two important improvements. They used iron for the blades, which made them stiffer, and they set the teeth of the saw to project alternatively right and left, which had the effect of making the saw-cut — or kerf — slightly wider than the blade, allowing smooth movement.

The Romans also invented the stiffened backsaw, whose blade is reinforced at the top. This prevents straight-through cuts, but the tool is useful for cabinetwork, especially when used in combination with a miter box. The most ingenious Roman addition to cutting tools is the frame saw. A relatively inexpensive narrow blade is held in a wooden frame and is kept taut by tightening a cord. Wooden frame saws worked so well that they remained the most common type of saw well into the nineteenth century (the principle of the frame saw survives in the modern hacksaw). In the mid-seventeenth century, a new type of saw was introduced in Holland and England. It had a broad, unstayed blade and a wooden pistol-grip handle. The rigid blade, originally made by rolling steel strips, makes a more accurate cut than a frame saw, and there is no frame to interfere with deep cuts. This effective tool became the basic modern handsaw. My workhorse is a twenty-six-inch Disston crosscut handsaw, with a skew-back blade, first introduced in 1874 by Henry Disston, a Philadelphia saw-maker. The open handsaw is a definite contender for best tool, but while it is certainly an elegant solution to an old problem, I think that David expects something a little more momentous.

The chief shaping device of the carpenter is the plane. The box plane is nothing more than a holder for a chisel blade, but it marks an important moment in the evolution of hand tools. Unlike an adze or a chisel, which depend on the skill of the craftsman, the effectiveness of a plane is built-in; that is, the carpenter does not need to control the blade, he provides only the motive force. One historian has called the plane "the most important advance in the history of woodworking tools." That makes it sound like a worthy candidate for best tool of the millennium. Unfortunately, I find that the plane, too, is a Roman invention.

Chisels have more ancient origins. Bronze Age carpenters used chisels with both integral handles and socketed wooden handles in house and furniture construction. The first, mallets, which resembled bowling pins, were pounded across the grain and had a short working life. Eventually, a handle was fitted to a separate head, whose harder end-grain made a more durable hammering surface. Heavy, long-handled mallets are called mauls. Eighteenth-century carpenters used a huge maul, known as the Commander, to drive together the joints of timber-framed houses and barns. The Commander has a head six inches in diameter and a foot long. I didn't have anything that big, but I did use a steel sledgehammer to coax stubborn joists and studs into place.

The most unusual hammer I own comes from a hard ware market in Mexico City. Made in China, it is a "combination-ease opener," that is, a packing-crate opener. Like the specialized shingler's hammer, which combines a hammer and a hatchet, the ease opener incorporates several tools: a hammer, a nail puller, a hatchet, and a crowbar. Mine must have been made in one of Mao's backyard furnaces, for shortly after I bought it, one of the metal claws broke off as I was pulling nails. Nevertheless, I still have it. While I am unsentimental about most possessions, I have never thrown away a tool.

I have always thought of combination tools as particularly modern gadgets — I am embarrassed to recollect that I once gave my father a screwdriver with a built-in flashlight as a Christmas present. In fact, the combination tool is ancient. The two oldest woodworking tools are the ax, for felling trees, and the adze — with its blade turned ninety degrees — used for dressing timber. A combination ax-adze was used by the Minoan civilization of Crete, which also invented the double-headed ax. The ax-adze was popular with Roman carpenters. The Romans, who invented forged iron nails, used another dual-purpose tool: the claw hammer. Pulling nails exerts heavy pressure on the handle, which risks being pulled out of its socket, or eye. Medieval English claw hammers sometimes had two metal straps that reinforced the connection to the handle. An American was responsible for the modern form of the claw hammer. In 1840, a Connecticut blacksmith, inspired by the adze, added a tapered neck that extended down the hammer handle, resulting in the so-called adze-eye hammer, which survives to this day.

Ancient Egyptian woodworkers used wooden pegs instead of nails. They made the holes with a bow drill. The bow drill, probably adapted from a fire-stick, has a cord wrapped around the drill and held taut by a bow. Holding the drill vertically, the carpenter moves the bow back and forth, like a cellist, pressing down on alternate turns. Because the carpenter exerts downward pressure with only one hand — and the cord can easily slip — the bow drill is ineffective for heavy drilling. (Bow drills continued to be used for delicate drilling until the nineteenth century.) Moreover, since each drilling stroke is followed by an idle return stroke, the bow drill wastes energy. Once again, it was the Romans who found a solution: the auger. The auger has a short wooden cross-handle, attached to a steel shaft whose tip is a spoon-shaped bit. The carpenter, holding the handle with both hands, can apply both great rotational force and heavy downward pressure. A particular variation of the auger, developed in the Middle Ages for drilling deep holes in ships' timbers, is called a breast auger. It is topped by a broad pad on which the carpenter rested the entire weight of his body.

The auger is a great advance, but it has one drawback: the bit tends to freeze in the wood between turns. The great breakthrough in drilling tools occurred during the Middle Ages with the invention of the carpenter's brace. The brace holds the same spoon-shaped bits as an auger, but the handle is shaped in such a way that it is possible — for the first" time in history — to drill holes with a continuous rotation. A rounded pad atop the brace enables the carpenter to push down on the bit as he turns with a smooth back-and-forth motion.

One of the earliest representations of a brace is contained in the right-hand panel of an altar triptych painted about 1425 by the Flemish artist Robert Campin and now hanging in the Metropolitan Museum of Art in New York. The subject is Saint Joseph in his workshop. Joseph is making mousetraps (this is an allegorical painting), and he is surrounded by tools — a hammer and nails, a chisel, pincers, a straight saw, and an auger. He is holding a carpenter's brace and is drilling a hole in a piece of wood that he awkwardly balances on the arm of his chair.

What is striking about the tool that joseph is holding is that it is identical to the eighteenth-century wooden braces I have seen in collections of American tools, and basically not much different from the brace in my own toolbox (although mine is steel). Some tools, such as hammers and saws, evolve slowly over centuries; others, such as planes, seemingly spring to life fully formed. The brace seems to have been such a case — it bears no resemblance to the auger or the bow drill. The brace has no antecedents because it incorporates an entirely new scientific principle: the crank. The crank is a mechanical device with a unique characteristic: it changes reciprocal motion — the carpenter's arm, moving back and forth — into rotary motion — the turning bit. The historian Lynn White Jr. characterized the discovery of the crank as "second in importance only to the wheel itself." The crank made possible not only the carpenter's brace, but also hand-cranked mills and grinders, as well as a variety of water- and wind-driven machines such as stamping mills and pumps, and eventually steam engines.

There is no material or textual evidence that the crank existed in antiquity — as far as we know, it is a medieval European discovery. The oldest representation of a crank is in a fourteenth-century medieval treatise that shows a design for a boat with a manual crank drive that resembles the kind of recreational foot-driven paddle-boat that is a staple of summer-cottage lakes and city parks. Bavarian book on military engineering published in 1405 includes a sketch of a milling machine turned by a hand crank. At about the same time, cranked lecterns (similar to modern dentists' adjustable tables) were used by scholars to swing books within convenient reading range." So, around 1400, cranks were-in the air. Whether the carpenter's brace came first or was inspired by one of these other gadgets, there is no doubt that this simple tool was the first practical application of the crank on a broad scale, The origin of the name brace, incidentally, is obscure. The tool was first called a piercer, for it was used to drill starting holes that were then enlarged with an auger. One historian speculates that brace may refer to the metal braces that were sometimes added to reinforce the crank shape.

The carpenter's brace is a good tool and it definitely belongs to our millennium. But, as far as my essay is concerned, there is a problem: the brace is, well, boring. Despite the importance of the crank, the carpenter's brace itself never really developed further. The only nonwoodworking application occurred in the sixteenth century, when surgical braces, called trephines, were used to cut out a disk of bone from the skull. Otherwise, the brace seems to have had an uneventful history. It was merely a better way of drilling holes.

I have spent a week thinking and reading without making much progress. Since I am embarrassed to admit to David Shipley that I can't come up with a subject, it's beginning to look as if I will have to write about the unexciting carpenter's brace. This is not going to be an easy assignment; what had seemed like fun is turning into a chore. Dejected, I mention my predicament to my wife, shirley. She thinks for a moment and answers, "There is one tool that I've always had at home. A screwdriver." I look at her skeptically. "Definitely, a screwdriver," she says. "Wherever I've lived, I've always had a screwdriver in the kitchen drawer. Preferably the kind that has several interchangeable heads, or whatever those end pieces are called." She adds conclusively, "You always need a screwdriver for something."

I had forgotten the screwdriver. I go back to my standard reference on hand tools, William Louis Goodman's History of Woodworking Tools, published in 1964. Goodman was a thirty-year veteran of teaching wood shop in an English boys' school. He was also a tool collector. I have the impression that he was someone who not only knew a lot about the origin of the Saxon adze, but could also give a handy personal demonstration of its proper use.

I look up screwdriver in Goodman's index — nothing. That's odd. Flipping through the book, I find an entire chapter on the carpenter's bench, a meditation on the origin of the glue pot, but nothing about screwdrivers. Then a chart catches my eye: "Woodworkers' Tool Kits at Various Periods. It lists the times when various carpentry tools were invented and confirms what I already know — most hand tools originated during the Roman period. The Middle Ages added the carpenter's brace; the Renaissance, some specialized planes. The next period, "1600 to 1800," saw the invention of the spokeshave, a sort of pulling knife used to make wheel spokes and chair spindles. Finally, in "1800 to 1962," I find the screwdriver. It is one of the last additions to the woodworker's toolbox.

dUsually, my 1949 edition of the Encyclopaedia Britannica is informative, but the entry "Screwdriver" is a simple definition — no history. The "Tools" entry does not even mention screwdrivers. I check the on-line Britannica, which is more helpful: "The handled screwdriver is shown on the woodworker's bench after 1800 and appears in inventories of tool kits from that-date." At least it isn't another Roman invention. I'm not convinced that the screwdriver is any more earthshaking than the carpenter's brace, and it is a laughably simple tool. Still, I am puzzled by its late appearance. It is definitely worth looking into.

Copyright © 2000 by Witold Rybczynski

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Table of Contents

Chapter 1 The Carpenter's Toolbox 13
Chapter 2 Turnscrews 29
Chapter 3 Lock, Stock, and Barrel 45
Chapter 4 The Biggest Little Invention 69
Chapter 5 Delicate Adjustments 87
Chapter 6 Mechanical Bent 107
Chapter 7 Father of the Screw 127
Glossary of Tools 145
Acknowledgments 153
Notes 155
Text Illustration Sources 163
Index 165
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First Chapter

Chapter 1

The Carpenter's Toolbox

This all starts with a telephone call from David Shipley, an editor at the New York Times. Would I write an article for a special millennium issue of the Sunday magazine? he asks. The end of the millennium is on many magazine editors' minds, and I have had a number of such requests. Shipley explains that the theme of the issue is The Best of the Millennium. That sounds interesting. "What do you want me to write about?" I ask.

"We're hoping that you can write a short essay about the best tool," he answers.

I am a bit let down. The best tool is hardly as weighty a subject as the best architect or the best city, topics I could really sink my teeth into. still, I have been working on a long biography and would welcome a break. Writing about the best tool of the millennium might even be fun.

While David Shipley is speaking, I compose the essay in my head. There is so much to choose from: paper clips, fountain pens, eyeglasses. I have recently seen a portrait in the Pennsylvania Academy of the Fine Arts of Benjamin Franklin wearing round spectacles, a reminder that Franklin was the inventor of the bifocal. Yet eyeglasses are much older than the eighteenth century. The first reference to eyeglasses is in a sermon given by a Dominican friar in Florence in 1306. He mentions that eyeglasses were invented twenty years earlier, and that he has even spoken with the inventor, although he neglects to give his name. Medieval eyeglasses were only for farsighted people and were used for reading and writing. They were the first practical application of the new science of optics, paving the way for such far-reaching inventions as the telescope and the microscope. A key influence on literacy, astronomy, and biology, eyeglasses surely qualify as "the best tool of the millennium." This is going to be easy.

However, when I mention my idea to David, it becomes clear that he has something else in mind. He means tool in the literal sense -- a handsaw or a hammer. So, not eyeglasses. He must hear the disappointment in my voice, and he points out that I once wrote a book about building my own house. That might make a good starting point, he suggests helpfully. All right, I say, I'll think about it.

In my case, "building my own house" meant actually building it. My wife and I, with the occasional help of friends, mixed concrete, sawed wood, plastered walls, and installed plumbing. We did everything ourselves except the electrical wiring. Ever since my boyhood experiences with recalcitrant train sets, I have been thwarted by electricity. Despite my father's patient explanations -- he was an electrical engineer -- and a college physics course, I never grasped the relationship between voltage, current, and resistance. Electricity, in fact, was a problem in our house-building project -- there was none. We were building on a rural site about eight hundred feet from the road, and although we planned to bring in power, initially we could not afford the cost of a temporary line. Renting a gas-powered generator would be expensive, too -- and noisy. I decided to build the framing and exterior of the house by hand. Once the basic structure was finished, which promised to take a year or two, we would bring in a line and hire a professional to install the electrical wiring.

Does one of my carpenter's tools qualify as the millennium's best? I discount power tools. I had used a portable circular saw, a drill, and a sander for finishing and cabinetwork, but these are chiefly loborsaving devices. Not that productivity isn't important. Ken Kern, the author of The Owner-Built Home, estimates that cutting all the two-by-fours for the frame of a small house would take seven full days using a handsaw, and only thirty minutes using a power saw. I appreciate the ease of cutting wood with power tools, but the result, while more quickly arrived at, is no different than if I use a handsaw. In any case, I enjoy working with my hands. One of the rewards of building something yourself -- a house or a bookshelf -- is the pleasure of using tools. Hand tools are true extensions of the human body, for they have evolved over centuries of trial and error. Power tools are more convenient, of course, but they lack precisely that sense of refinement. No doubt, if I spent my life hammering nails, I would feel differently about the, virtues of a nail gun, say. Yet increasing the productivity of carpenters does not seem to me in the same category as the invention of entirely new devices such as eyeglasses.

That leaves my box of hand tools. The tools required for the construction of a small wood-frame house fall roughly into four categories: measurement, cutting and shaping, hammering, and drilling. My measuring tools include a try square, a bevel, a chalk line, a plumb bob, a spirit level, and a tape measure. A little reading informs me that almost all these tools predate our millennium; indeed, most predate the first millennium of the Christian age. A Roman builder, or mensor aedificorum, was familiar with the try square, the plumb line, and the chalk line -- all tools that were developed by the ancient Egyptians. The level, or libella, also an Egyptian invention, consisted of a wood frame resembling the letter A, with a plumb bob suspended from the apex. To level, the string was lined up with a mark in the center of the crossbar. Not as compact as my spirit level, perhaps, but obviously just as serviceable since A-levels continued to be used until the mid-1800s. The spirit level, with its sealed tube containing an air bubble floating in alcohol, was invented in the mid-1600s. It was first exclusively a surveying instrument -- it took another two hundred years to find its way into the carpenter's toolbox. For measuring length, the Roman mensor used a regula, or a wooden stick divided into feet, palms, twelfths or unciae (whence our inches), and digiti or finger widths. I have a yardstick, too, but most of my measuring is done with a retractable steel tape. That, at least, would impress ray Roman counterpart, whose only compact measuring device was a one-foot bronze folding rule. Oak yardsticks were used in the Middle Ages, and folding rules, in ivory, brass, or boxwood, reappeared in the eighteenth century I can't find the origins of the tape measure, but I would guess that it was developed sometime in the late 1800s. I would be lost. without my twenty-five-foot retractable tape measure, but it does not seem to me to qualify as the best tool of the millennium.

I own several saws. The handsaw, too, is an ancient tool: archaeologists have found metal-toothead Egyptian saws dating back to 1500 B.C. They have broad blades, some as long as twenty inches, curved wooden handles, and irregular teeth. The blades are copper, a soft metal. To keep the blade from buckling, the Egyptian saw was pulled -- not pushed. Pulling is less effective than pushing, since the carpenter cannot bear down on the cutting stroke, and sawing wood must have been a slow and laborious process. The Romans made two important improvements. They used iron for the blades, which made them stiffer, and they set the teeth of the saw to project alternatively right and left, which had the effect of making the saw-cut -- or kerf -- slightly wider than the blade, allowing smooth movement.

The Romans also invented the stiffened backsaw, whose blade is reinforced at the top. This prevents straight-through cuts, but the tool is useful for cabinetwork, especially when used in combination with a miter box. The most ingenious Roman addition to cutting tools is the frame saw. A relatively inexpensive narrow blade is held in a wooden frame and is kept taut by tightening a cord. Wooden frame saws worked so well that they remained the most common type of saw well into the nineteenth century (the principle of the frame saw survives in the modern hacksaw). In the mid-seventeenth century, a new type of saw was introduced in Holland and England. It had a broad, unstayed blade and a wooden pistol-grip handle. The rigid blade, originally made by rolling steel strips, makes a more accurate cut than a frame saw, and there is no frame to interfere with deep cuts. This effective tool became the basic modern handsaw. My workhorse is a twenty-six-inch Disston crosscut handsaw, with a skew-back blade, first introduced in 1874 by Henry Disston, a Philadelphia saw-maker. The open handsaw is a definite contender for best tool, but while it is certainly an elegant solution to an old problem, I think that David expects something a little more momentous.

The chief shaping device of the carpenter is the plane. The box plane is nothing more than a holder for a chisel blade, but it marks an important moment in the evolution of hand tools. Unlike an adze or a chisel, which depend on the skill of the craftsman, the effectiveness of a plane is built-in; that is, the carpenter does not need to control the blade, he provides only the motive force. One historian has called the plane "the most important advance in the history of woodworking tools." That makes it sound like a worthy candidate for best tool of the millennium. Unfortunately, I find that the plane, too, is a Roman invention.

Chisels have more ancient origins. Bronze Age carpenters used chisels with both integral handles and socketed wooden handles in house and furniture construction. The first, mallets, which resembled bowling pins, were pounded across the grain and had a short working life. Eventually, a handle was fitted to a separate head, whose harder end-grain made a more durable hammering surface. Heavy, long-handled mallets are called mauls. Eighteenth-century carpenters used a huge maul, known as the Commander, to drive together the joints of timber-framed houses and barns. The Commander has a head six inches in diameter and a foot long. I didn't have anything that big, but I did use a steel sledgehammer to coax stubborn joists and studs into place.

The most unusual hammer I own comes from a hard ware market in Mexico City. Made in China, it is a "combination-ease opener," that is, a packing-crate opener. Like the specialized shingler's hammer, which combines a hammer and a hatchet, the ease opener incorporates several tools: a hammer, a nail puller, a hatchet, and a crowbar. Mine must have been made in one of Mao's backyard furnaces, for shortly after I bought it, one of the metal claws broke off as I was pulling nails. Nevertheless, I still have it. While I am unsentimental about most possessions, I have never thrown away a tool.

I have always thought of combination tools as particularly modern gadgets -- I am embarrassed to recollect that I once gave my father a screwdriver with a built-in flashlight as a Christmas present. In fact, the combination tool is ancient. The two oldest woodworking tools are the ax, for felling trees, and the adze -- with its blade turned ninety degrees -- used for dressing timber. A combination ax-adze was used by the Minoan civilization of Crete, which also invented the double-headed ax. The ax-adze was popular with Roman carpenters. The Romans, who invented forged iron nails, used another dual-purpose tool: the claw hammer. Pulling nails exerts heavy pressure on the handle, which risks being pulled out of its socket, or eye. Medieval English claw hammers sometimes had two metal straps that reinforced the connection to the handle. An American was responsible for the modern form of the claw hammer. In 1840, a Connecticut blacksmith, inspired by the adze, added a tapered neck that extended down the hammer handle, resulting in the so-called adze-eye hammer, which survives to this day.

Ancient Egyptian woodworkers used wooden pegs instead of nails. They made the holes with a bow drill. The bow drill, probably adapted from a fire-stick, has a cord wrapped around the drill and held taut by a bow. Holding the drill vertically, the carpenter moves the bow back and forth, like a cellist, pressing down on alternate turns. Because the carpenter exerts downward pressure with only one hand -- and the cord can easily slip -- the bow drill is ineffective for heavy drilling. (Bow drills continued to be used for delicate drilling until the nineteenth century.) Moreover, since each drilling stroke is followed by an idle return stroke, the bow drill wastes energy. Once again, it was the Romans who found a solution: the auger. The auger has a short wooden cross-handle, attached to a steel shaft whose tip is a spoon-shaped bit. The carpenter, holding the handle with both hands, can apply both great rotational force and heavy downward pressure. A particular variation of the auger, developed in the Middle Ages for drilling deep holes in ships' timbers, is called a breast auger. It is topped by a broad pad on which the carpenter rested the entire weight of his body.

The auger is a great advance, but it has one drawback: the bit tends to freeze in the wood between turns. The great breakthrough in drilling tools occurred during the Middle Ages with the invention of the carpenter's brace. The brace holds the same spoon-shaped bits as an auger, but the handle is shaped in such a way that it is possible -- for the first" time in history -- to drill holes with a continuous rotation. A rounded pad atop the brace enables the carpenter to push down on the bit as he turns with a smooth back-and-forth motion.

One of the earliest representations of a brace is contained in the right-hand panel of an altar triptych painted about 1425 by the Flemish artist Robert Campin and now hanging in the Metropolitan Museum of Art in New York. The subject is Saint Joseph in his workshop. Joseph is making mousetraps (this is an allegorical painting), and he is surrounded by tools -- a hammer and nails, a chisel, pincers, a straight saw, and an auger. He is holding a carpenter's brace and is drilling a hole in a piece of wood that he awkwardly balances on the arm of his chair.

What is striking about the tool that joseph is holding is that it is identical to the eighteenth-century wooden braces I have seen in collections of American tools, and basically not much different from the brace in my own toolbox (although mine is steel). Some tools, such as hammers and saws, evolve slowly over centuries; others, such as planes, seemingly spring to life fully formed. The brace seems to have been such a case -- it bears no resemblance to the auger or the bow drill. The brace has no antecedents because it incorporates an entirely new scientific principle: the crank. The crank is a mechanical device with a unique characteristic: it changes reciprocal motion -- the carpenter's arm, moving back and forth -- into rotary motion -- the turning bit. The historian Lynn White Jr. characterized the discovery of the crank as "second in importance only to the wheel itself." The crank made possible not only the carpenter's brace, but also hand-cranked mills and grinders, as well as a variety of water- and wind-driven machines such as stamping mills and pumps, and eventually steam engines.

There is no material or textual evidence that the crank existed in antiquity -- as far as we know, it is a medieval European discovery. The oldest representation of a crank is in a fourteenth-century medieval treatise that shows a design for a boat with a manual crank drive that resembles the kind of recreational foot-driven paddle-boat that is a staple of summer-cottage lakes and city parks. Bavarian book on military engineering published in 1405 includes a sketch of a milling machine turned by a hand crank. At about the same time, cranked lecterns (similar to modern dentists' adjustable tables) were used by scholars to swing books within convenient reading range." So, around 1400, cranks were-in the air. Whether the carpenter's brace came first or was inspired by one of these other gadgets, there is no doubt that this simple tool was the first practical application of the crank on a broad scale, The origin of the name brace, incidentally, is obscure. The tool was first called a piercer, for it was used to drill starting holes that were then enlarged with an auger. One historian speculates that brace may refer to the metal braces that were sometimes added to reinforce the crank shape.

The carpenter's brace is a good tool and it definitely belongs to our millennium. But, as far as my essay is concerned, there is a problem: the brace is, well, boring. Despite the importance of the crank, the carpenter's brace itself never really developed further. The only nonwoodworking application occurred in the sixteenth century, when surgical braces, called trephines, were used to cut out a disk of bone from the skull. Otherwise, the brace seems to have had an uneventful history. It was merely a better way of drilling holes.

I have spent a week thinking and reading without making much progress. Since I am embarrassed to admit to David Shipley that I can't come up with a subject, it's beginning to look as if I will have to write about the unexciting carpenter's brace. This is not going to be an easy assignment; what had seemed like fun is turning into a chore. Dejected, I mention my predicament to my wife, shirley. She thinks for a moment and answers, "There is one tool that I've always had at home. A screwdriver." I look at her skeptically. "Definitely, a screwdriver," she says. "Wherever I've lived, I've always had a screwdriver in the kitchen drawer. Preferably the kind that has several interchangeable heads, or whatever those end pieces are called." She adds conclusively, "You always need a screwdriver for something."

I had forgotten the screwdriver. I go back to my standard reference on hand tools, William Louis Goodman's History of Woodworking Tools, published in 1964. Goodman was a thirty-year veteran of teaching wood shop in an English boys' school. He was also a tool collector. I have the impression that he was someone who not only knew a lot about the origin of the Saxon adze, but could also give a handy personal demonstration of its proper use.

I look up screwdriver in Goodman's index -- nothing. That's odd. Flipping through the book, I find an entire chapter on the carpenter's bench, a meditation on the origin of the glue pot, but nothing about screwdrivers. Then a chart catches my eye: "Woodworkers' Tool Kits at Various Periods. It lists the times when various carpentry tools were invented and confirms what I already know -- most hand tools originated during the Roman period. The Middle Ages added the carpenter's brace; the Renaissance, some specialized planes. The next period, "1600 to 1800," saw the invention of the spokeshave, a sort of pulling knife used to make wheel spokes and chair spindles. Finally, in "1800 to 1962," I find the screwdriver. It is one of the last additions to the woodworker's toolbox.

Usually, my 1949 edition of the Encyclopaedia Britannica is informative, but the entry "Screwdriver" is a simple definition -- no history. The "Tools" entry does not even mention screwdrivers. I check the on-line Britannica, which is more helpful: "The handled screwdriver is shown on the woodworker's bench after 1800 and appears in inventories of tool kits from that-date." At least it isn't another Roman invention. I'm not convinced that the screwdriver is any more earthshaking than the carpenter's brace, and it is a laughably simple tool. Still, I am puzzled by its late appearance. It is definitely worth looking into.

Copyright © 2000 by Witold Rybczynski

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  • Anonymous

    Posted April 17, 2002

    One Good Read

    Being charged with the task of first identifying and then composing an essay on the best tool of the millenium for The New York Times would have been enough to send most sane writers scurrying to employment offices in search of a new profession. A daunting task to say the least, the assignment merely elicits disappointment from Witold Rybczynski, when he is informed by his editor that 'tool' means hand tool and not 'tool' as in item of modern convenience, such as, say eyeglasses. Upon completion of an essay that, while interesting and informative, lacked the joie de vivre a reader might have hoped for and expected in reading an essay whose theme was based on the best of 1,000 years, the author found himself in possession of a millennium worth of research material and, what oftentimes seems like at least a thousand hours of experiences and stories. Thus, 'One Good Turn' was written with an altogether different and better premises altogether. Not a predictable, humorless elaboration of The New York Times essay, 'One Good Turn' is as organically arrived at as its topic was historically, and is as simply remarkable as its subject's original and various manifestations and uses. 'One Good Turn' is not only about the natural adaptation of the screwdriver and the screw. It is about discovery and the natural process of the journey. Rybcznski is a writer clearly in command of his craft. In his capable hands, we are taken on a discursive and pleasantly distracting tour of personal stories, deceptively peculiar details, amazing, actual events, and historical vignettes -- all of which come alive and provide current connection for the reader. Who else could so seamlessly and enjoyably take us from a story about building his own home, to describing a 'beautifully illustrated' manual for Medieval households, to the story of Henry Ford and two inventors, one of whom has been reduced to historical trivia along with his superior invention, to the story of a mathematician who despised practicality for its own sake and only 'strove after those things which, in their beauty and excellence, remain beyond all contact with the common needs of life'? These seemingly incongruous chronicles do, however, create a sweeping, yet well-structured tale and bring us back to the common needs of life B historically and presently. Plainly poetic and gracefully realized, 'One Good Turn' illustrates the nature of human ingenuity, and the uneven path that often leads to the course of creation. Oftentimes, the destination is not as important as the journey. But readers of this misleadingly complex and simply ingenious rarity of a book will be well rewarded in both.

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  • Anonymous

    Posted January 3, 2002

    One Good Turn definitely deserves another read

    I picked this little bargain book up in the airport the other day while waiting for my long delayed flight to take off. Little did I know that this book was going to be so delightful. I enjoyed it for two primary reasons: first, I have been in the building engineer field for 16 years, and defintely have the tool/gadget fetish. The content of this little screwdriver bible fulfills that need. Secondly, I was drawn to this book since I once, several years ago, attempted to get information on the various types of screws and their history, to little avail. Essentially that type of document in one place did not exist, until now. This book is a definite must for gadgeteers and engineers alike, but can also be enjoyed by anyone who loves a mystery. It is well researched, well written and can be read in just a couple of hours. I'm definitely looking at other titles that this author has published. What are you waiting for, go get a copy and read it!

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