Advanced Reading Book, Literary and ScientificT. Laurie, 1859 - 424 pages |
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Page 46
... sound as at present ; and where the air is very thin , as upon the tops of high mountains , the sound is much weakened . I fired a little cannon at the top of Mont Blanc last summer , and found the sound much weaker than when a similar ...
... sound as at present ; and where the air is very thin , as upon the tops of high mountains , the sound is much weakened . I fired a little cannon at the top of Mont Blanc last summer , and found the sound much weaker than when a similar ...
Page 47
... sound , strikes against a wall , it is reflected back and constitutes an echo . The reflected wave of sound moves with exactly the same velocity as the direct one . Now , suppose a gun to be fired at a distance 2200 feet from the side ...
... sound , strikes against a wall , it is reflected back and constitutes an echo . The reflected wave of sound moves with exactly the same velocity as the direct one . Now , suppose a gun to be fired at a distance 2200 feet from the side ...
Page 48
... sound of the waterfall was so loud that he could imagine himself close beside it . During the day , the sound was much feebler . You will perhaps think that this was quite natural owing to the greater stillness of the night , but the ...
... sound of the waterfall was so loud that he could imagine himself close beside it . During the day , the sound was much feebler . You will perhaps think that this was quite natural owing to the greater stillness of the night , but the ...
Contents
LESSONS IN NATURAL HISTORY | 1 |
THE MATERIALS USED FOR PERFUMERY | 7 |
THOMSON | 10 |
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Advanced Reading Book: Literary and Scientific (Classic Reprint) UNKNOWN. AUTHOR No preview available - 2016 |
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