Heat: A Mode of Motion |
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absorbed absorption Acetic ether action amount of heat Amylene aqueous vapour atmosphere atoms augmented beam bismuth bisulphide of carbon body boiling CALORESCENCE calorific carbonic acid cause cell CHAP chilled Chloroform cloud cold colour combustion condensation copper cube cylinder deflection degrees diathermic distance earth effect emitted energy ethereal waves expansion experiment experimental tube feet flame flask focus force Formic ether friction galvanometer gases glass hence hydrogen incandescent inch intercepted invisible rays Iodide iodine Joule light liquid luminous matter mechanical Melloni mercury metal molecular molecules motion needle nitrite of amyl observed obtained olefiant gas oxygen particles pass placed plate platinum polarisation pressure produced quantity of heat radiant heat radiation raise rock-salt screen sensible solar solid source of heat space spectrum spiral substance sufficient Sulphuric ether surface temperature thermo-electric pile thermometer thickness tion transparent velocity vessel vibrations visible waves weight wire
Popular passages
Page 93 - expanded by heat, it is equally evident that its parts must have separated from each other. The immediate cause of the phenomenon of heat, then, is motion ; and the laws of its communication are precisely the same as the laws of the communication of motion. ' Since all matter may be made to fill a smaller
Page 500 - would have to be made in air upon air!' ' The more the subject is considered,' adds the celebrated philosopher last named, ' the more it will be found beset with difficulties, and its explanation, when arrived at, will probably be found to carry with it that of the blue colour of the sky itself.
Page 463 - (Konigsberg), the amber-tree bloomed, and dropped its costly gum on the earth and in the sea; when in Europe and North America groves of tropical palms flourished, in which gigantic lizards, and, after them, elephants, whose mighty remains are still buried in the earth, found a home. Different geologists, proceeding from different
Page 347 - from the air which overspreads this country, and you would assuredly destroy every plant capable of being destroyed by a freezing temperature. The warmth of our fields and gardens would pour itself unrequited into space, and the sun would rise upon an island held fast in the iron grip of
Page 93 - by cooling, it is evident that the particles of matter must have space between them; and since every body can communicate the power of expansion to a body of a lower temperature—that is, can give an expansive motion to its particles—it is a probable inference that its own particles are possessed of motion
Page 467 - atoms, setting the oxygen free, and allowing the carbon and the hydrogen to aggregate in woody fibre. If the sun's rays fall upon a surface of sand, the sand is heated, and finally radiates away as much heat as it receives; but let the same beams fall upon a forest;
Page 509 - be in great part quenched by a Nicol's prism, while the light of a cloud, being unpolarised, cannot be thus extinguished. Hence the possibility of very remarkable variations, not only in the aspect of the firmament, which is really changed, but also in the aspect of the clouds which have that firmament as a background.
Page 94 - seems possible to account for all the phenomena of heat if it be supposed that in solids the particles are in a constant state of vibratory motion, the particles of the hottest bodies moving with the greatest velocity, and
Page 512 - peak and ridge is separated from the mountains behind it by a thin blue haze, which renders the relations of the mountains as to distance unmistakable. When this haze is regarded through the Nicol perpendicular to the sun's rays, it is in many cases wholly quenched, because the light which it emits in this direction is
Page 376 - The deflection produced by the breath, freed from its moisture, but retaining its carbonic acid, was first determined. Carbonic acid, artificially prepared, was then mixed with perfectly dry air, in such proportions that its action upon the radiant heat was the same as that of the carbonic acid of the breath. The percentage of the former being known,