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Posted July 17, 2012
This book is very well written and explains ancient mathematics as well as very expensive and rarely read book only found in University Libraries. I do however feel that he occasionally includes folklore which can easily be proved false. For example on page 257 he describes the "well known" story of how Eratosthenes was the first to measure the Circumference of the earth. He almost discovers the truth where he writes that the measurement is easier using the north star. The circumference of the Earth was measured at least 2500 years before Eratosthenes was born. Here is the proof.
The distance between alexandria and Syene was said to be 7.2 degrees in latitude.
Looking it up on google earth, I cannot disagree therefore the distance is 432 arc minutes.
Syene is 150 nautical miles east of Alexandria so the straight line distance would have been about 458 nautical miles. The Egyptian Stadia was 500 reman or 0.101236 nautical miles, the greek stadia was 600 attic feet or 0.09998 nautical miles. if the Egyptian scribes has correctly stated the NORTH- SOUTH distance between the cities as 4320 greek stadia or 4270 Egyptian stadia, Eratosthenes would have instantly known that the measurement had been made at least 2500 years earlier.
Posted June 12, 2011
MUST READ! "How Mathematics Happened" is exactly how we need to teach children about math. This was a fascinating book that had great math problems ranging from changing base 10 to base 60 to geometric algebra proofs . Rudman spells out exactly how counting and measuring were was created and how the ancient people's mind set led them to form a mathematical system that is founded on different bases, different algorithms for division and multiplication, and different representation. His final chapter is what needs to be read by all in education business. He understands that by having our young children taught by people that do not like (or understand) math causes them once in high school students to hate math too. Rather than force a humanities teacher to change his/her lessons to support Math in Science, maybe we should teach math the ones that want to learn it. Computers/calculators take care of the arithmetic now, so why waste brain power and time on memorizing tables when we could be exploring abstract thought. As I say to many students, "I am a Mathematician, not an Arithmetician." Rudman understands this difference and his book will spells the differnce out very well.Was this review helpful? Yes NoThank you for your feedback. Report this reviewThank you, this review has been flagged.
Posted July 16, 2008