The Story of the Earth's Atmosphere [NOOK Book]

Overview

This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing ...
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The Story of the Earth's Atmosphere

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NOOK Book (eBook - Digitized from 1897 volume)
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Overview

This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.
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Product Details

  • BN ID: 2940025587941
  • Publisher: Butterworth-Heinemann
  • Format: eBook
  • Edition description: Digitized from 1897 volume
  • File size: 267 KB

Read an Excerpt


These same minute dust particles, by their scattering action on the small waves of light at the violet end of the spectrum, have been shewn by Lord Rayleigh to be the cause of blue sky, while its gradual deepening into black as we ascend is readily seen to be the result of their gradual diminution in number. CHAPTER III. THE PRESSURE AND WEIGHT OF THE ATMOSPHERE. One of the first facts which is brought to our notice in these days when those physical laws, which the ancient philosophers discovered towards the end of their lives, are taught us from childhood, is that the air has weight and exerts pressure. The story of the discovery of the barometer or weight measurer is a romantic chapter in the history of science. About 1643, some Florentine gardeners found that they were unable to pump up water higher than thirty-three feet. Up to thdt time it was an accepted dogma that" Nature abhorred a vacuum," and this apparent lapse on the part of Nature was looked upon as inexplicable. When Galileo was informed of it, soured as he was with a world which had rejected some of his greatest discoveries, he cynically remarked that Nature evidently abhorred a vacuum up to thirty-three feet. His pupil, Torricelli, however, was not content with this perfunctory explanation, and applyinghis genius to the question, conjectured that the column of thirty-three feet of water exactly balanced a similar column of air stretching to the limits of the atmosphere. Remembering that mercury was about thirteen times as heavy as water, he inferred that if this were true, a mercury pump would only raise mercury to a height of about 30 inches. He thereupon filled a long glass tube with mercury, and having stopped upone end, placed his thumb over the open end and inverted it over a basin of the liquid ...
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