A Text-book of Physics, Volume 1

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C. Griffin, limited, 1902 - 228 pages
 

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Page 3 - matrix) upon all the gold, to the action of the same upon all the wood ; that is, as the weight of the one to the weight of the other. And the like happened in the other bodies.
Page 54 - hours, and it would oscillate about that position in not less than 17 hours. Or, if the gravitation is less in the crossed than in the parallel position, and in a constant ratio, the difference is less than 1 in 16,000 in the one case and less than 1 in 2800 in the other.
Page 49 - kind with gravitation. The evidence of ordinary weighings may, perhaps, be rejected, inasmuch as both sides will be equally affected as the balance is commonly used. But a spring balance should show if there is any large effect when used in different positions above different media, or in different
Page 52 - period of the hanging sphere—ie, if the larger sphere revolved in 240 seconds. But in the conditions of the experiment the vibrations of the small sphere were very much damped, and the forced oscillations did not mount up as they would in a freer swing. The disturbances, which were mostly of an
Page 53 - represent vibrations set out to a horizontal time scale. The upper curve is a regular vibration of range ± 3, the lower a disturbance beginning with range ±10. The first has period 1, the second period 1-25. Now, cutting the curves into lengths equal to the period of
Page 54 - seconds, regulating the speed if necessary, and an observer at the telescope gave the scale reading at every signal, that is, 10 times during the period. The values were arranged in 10 columns, each horizontal line giving the readings of a period. The experiment was carried on for about
Page 49 - If we enclose a magnet in a hollow box of soft iron placed in a magnetic field, the lines of force are gathered into the iron and largely cleared away from the inside cavity, so that the magnet is screened from external action.

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