A Treatise on Heat: The thermometer; dilatation; change of state; and laws of vapours, Part 1Hodges and Smith, 1849 - 282 pages |
Contents
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Common terms and phrases
3me Serie accordingly air thermometer alcohol amylic alcohol Annales de Chimie apparatus appears aqueous vapour ascertained atmospheric ball balloon barometer barometric boiling point boiling water Boutigny carbon carbonic acid Centigrade change of temperature Chim coefficient of dilatation coefficient of expansion column constant contained cylinder Dalton degrees determined dilatation of mercury Ditto Dulong ebullition effect elastic force envelope equal equation experiments expressed filled fluid formula gases Gay-Lussac Gay-Lussac's laws given graduated inch inches of mercury increase iron latter length liquid M. I. Pierre manometer mass measured melting ice Memoirs mercurial thermometer metal method millimetres observed occupied pendulum perature Physique platina pressure pyrometer quantity of heat ratio rature ratus Regnault represented scale screw solid bodies spheroidal standard substance sulphurous acid suppose surface Tempe tempera temperature corresponding tion tube ture V₁ vessel vulgar fraction weight
Popular passages
Page 31 - What is now required is the measurement of the distance which the index has been thrust forward from its first position; and this, though in any case but small, may be effected with great precision by means of the scale. This is independent of the register, and consists of two rules of brass, accurately joined together at a right angle by their edges, and fitting square upon two sides of the blacklead bar. At one end of this double rule a small plate of brass projects at a right angle, which may...
Page 89 - Upon the whole therefore I see no sufficient reason why we may not conclude, that all elastic fluids under the same pressure expand equally by heat — and that for any given expansion of mercury, the corresponding expansion of air is proportionally something less, the higher the temperature.
Page 103 - It is determined, we find, as a certain fraction of the length of a pendulum vibrating seconds in the latitude of London.
Page 144 - ... to double that pressure. M. CAGNIARD DE LA ToUR has shown that at a certain temperature, a liquid, under sufficient pressure, becomes clear transparent vapour or gas, having the same bulk as the liquid. At this temperature, or one a little higher, it is not likely that any increase of pressure, except perhaps one exceedingly great, would convert the gas into a liquid.
Page 125 - ... iron and sandstone in any great degree, as their expansion, so far as regards buildings, may be considered the same. Arguments from this source were employed against the arches of...
Page 144 - ... could never appear as liquids, or be made to lose their gaseous state at common temperatures. They may probably be brought into the state of very condensed gases, but not liquefied.
Page 147 - Donny concludes, from his experiments, that the mutual force of cohesion of the particles of water is equal to a pressure of about three atmospheres, and to this strong cohesive force he attributes the irregular jumping motion observed in ebullition, and also some of those explosions of steam-boilers which heretofore have perplexed engineers. It is well known that cases have occurred in which an open pan of boiling water has exploded, producing fatal...
Page 103 - There is no practical advantage in having a quantity commensurable to any original quantity existing, or which may be imagined to exist, in nature, except as affording some little encouragement to its common adoption by neighbouring nations.
Page 111 - ... whose vibration is neither retarded nor quickened, — all the particles above having just the same tendency to vibrate faster that those below have to vibrate slower. This point is called the centre of vibration, and it is obvious that the time of vibration of a compound pendulum is the same as that of a simple pendulum whose length is equal to the distance of the centre of vibration from the point of suspension. This distance is the virtual length of the pendulum. When the form of the pendulum...