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according acid acting action angle apparatus appears atmosphere attraction axis battery becomes body called cause centre charged closed colours column conductor connected consequently consists containing continuous copper cylinder density described determined diameter direction distance effect electricity equal experiment fall fixed force gases given gives glass gravity greater heat Hence inches increases indicated intensity iron latter length less light liquid lower luminous magnetic manner means measured mercury metal mirror motion move needle negative object observed obtained opposite parallel passes placed plane plate pole position pressure principal produced proportional quantity raised rays reflected refraction represented resistance respectively resultant rises round scale seen shown shows side solid sound specific substance suppose surface temperature tension tube turned unit vapour varies vertical vessel vibrations volume weight wire zero
Pàgina 724 - Towards the end of the last century, and at the beginning of the present...
Pàgina 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°.
Pàgina 71 - ... is equal to the weight of a column of water whose base is the...
Pàgina 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.
Pàgina 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...
Pàgina 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.
Pàgina 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...
Pàgina 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.