Natural Philosophy

J.B. Lippincott, 1883 - 350 σελίδες

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Σελίδα 272 - I went into the cube and lived in it, and using lighted candles, electrometers, and all other tests of electrical states, I could not find the least influence upon them, or indication of anything particular given by them, though all the time the outside of the cube was powerfully charged, and large sparks and brushes were darting off from every part of its outer surface.
Σελίδα 19 - Newton's three laws: a body at rest remains at rest, and a body in motion remains in uniform motion in a straight line unless acted upon by an external force...
Σελίδα 59 - A wheel and axle is used to raise a bucket from a well. The radius of the wheel is 15...
Σελίδα 131 - Nothing can be more surprising,' writes Sir John Herschel, in reference to this subject, 'than to see two persons, neither of them deaf, the one complaining of the penetrating shrillness of a sound, while the other maintains there is no sound at all.

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