Natural Philosophy for General Readers and Young People

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Longmans, Green, and Company, 1905 - Physics - 759 pages
 

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Page 117 - Hence, subtracting 510 from 585. the difference 75 represents the weight of the displaced water, that is, the weight of a volume of water equal to that of the...
Page 211 - Ut queant laxis resonare fibris Mira gestorum famuli tuorum Solve polluti labii reatum Sancte loannes.
Page 120 - The weights necessary for this purpose represent then the weight of a volume of water equal to that of the body.
Page 168 - D into the lower globe, and expels the air, which is forced into the upper globe. The air thus compressed acts upon the water and makes it jet out through the shortest tube, as represented in the figure.
Page 133 - ... and hence it follows, that the pressure of the atmosphere is equal to that of a column of mercury, the height of which is thirty inches.
Page 718 - ... from a very slow diminution in the eccentricity of the earth's orbit, caused by the attraction of the planets. For a further account of Halley's astronomical labours, we may refer to the History of Astronomy in the Library of Useful Knowledge, page 79. We must also ascribe to Halley the first correct application of the barometer to the measurement of the heights of mountains. Mariotte, who first enunciated the remarkable law that the elastic forces of gases are in the inverse proportion of the...
Page 372 - ... if the total quantity of heat which the earth receives from the sun in the course of a year were uniformly distributed over all...
Page 527 - 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...
Page 3 - Thomson gives this illustration : — ' Imagine a drop of rain, or a glass sphere the size of a pea, magnified to the size of the earth, the molecules in it being increased in the same proportion. The structure of the mass would then be coarser than that of a heap of fine shot, but probably not so coarse as that of a heap of cricket -balls.
Page 138 - The siphon barometer has no cistern, but consists of a bent glass tube (fig. 125), one of the branches of which is much longer than the other. The longer branch, which is closed at the top, is filled with mercury as in the cistern barometer ; while the shorter branch, which is open, serves as a cistern. The difference between the two levels is the height of the barometer.

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