Advanced Reading Book, Literary and ScientificT. Laurie, 1859 - 424 pages |
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Page 47
... 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 of a house or of a mountain which reflects ...
... 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 of a house or of a mountain which reflects ...
Page 48
... reflected , and this occurred so often , that before it reached the place where M. de Humboldt was stationed , the sound was greatly enfeebled . At night the rocks became cooled , there was no longer that great difference of temperature ...
... reflected , and this occurred so often , that before it reached the place where M. de Humboldt was stationed , the sound was greatly enfeebled . At night the rocks became cooled , there was no longer that great difference of temperature ...
Page 52
... reflected back along the same line . But if the beam of light fall obliquely upon R E , like L B , it will be reflected obliquely along the line B L ' ; and it will be so reflected as to make the angle at i equal to the angle at r . The ...
... reflected back along the same line . But if the beam of light fall obliquely upon R E , like L B , it will be reflected obliquely along the line B L ' ; and it will be so reflected as to make the angle at i equal to the angle at r . 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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