Elementary treatise on physics, experimental and applied

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1868 - 861 pages

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Page 724 - Towards the end of the last century, and at the beginning of the present...
Page 40 - Every particle of matter, in the universe, attracts every other particle with a force, which is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
Page 348 - By a unit of heat is meant the quantity of heat necessary to raise the temperature of one kilogramme of water one degree centigrade, or more accurately from 0 to 1.
Page 71 - ... is equal to the weight of a column of water whose base is the...
Page 112 - Fig. 91. diameter, the edges of which are made to fit tightly, and are well greased. One of the hemispheres is provided with a stopcock, by which it can be screwed on the air-pump, and on the other there is a handle. As long as the hemispheres contain air they can be separated without any difficulty, for the external pressure of the atmosphere is counterbalanced by the elastic force of the air in the interior.
Page 348 - ... water But as, from the conditions of the experiment, they have each been receiving the same amount of heat, it is clear that the quantity of heat which is sufficient to raise the temperature of mercury through a certain...
Page 246 - Specific gravity is the ratio of the weight of a certain volume of a substance to the weight of an equal volume of water. For liquids of limited solubility, the specific gravity will predict whether the product will sink or float in water.
Page 171 - So long as these sonorous waves are not obstructed in their motion, they are propagated in the form of concentric spheres ; but when they meet with an obstacle, they follow the general law of elastic bodies ; that is, they...
Page 300 - One of the bulbs is covered with muslin, and is kept continually moist by being connected with a reservoir of water by means of a string. Unless the air is saturated with moisture the wet bulb thermometer always indicates a lower temperature than the other, and the difference between the indications of the two thermometers is greater in proportion as the air can take up more moisture.
Page 452 - D is in the orange ray ; E, in the green ; F, in the blue ; G, in the indigo ; H, in the violet.

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