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absolute units adiabatic amount applied axis body British Association cable calculated called Cambridge Carnot cycle Carnot's theory centre charge q circuit coil College conductor constant cycle density direction discussion disk dynamical theory earth effect electricity and magnetism electrified electromotive force energy equation equipotential surface equivalent experimental experiments fluid Fourier function George Gabriel Stokes gyrostat heat engine idea induced distribution inverse isothermal James Thomson Joule kinetic laboratory lectures liquid Lord Kelvin mathematical matter ment mercury-in-glass thermometer metals method motion Natural Philosophy obtained paper Peterhouse physical point-charge potential pressure produced Professor Thomson quantity ratio referred refrigerator regarded resistance reversible engine rotation scale scientific specific heat sphere spherical surface Stokes stress substance taken temperature theorem theory of heat thermal thermodynamic thermometer tion tube University of Glasgow velocity volume whole wire zero
Page 116 - axiom " : " It is impossible, by means of inanimate material agency, to derive mechanical effect from any portion of matter by cooling it below the temperature of the coldest of the surrounding objects.
Page 230 - in the continuation of the different species of animals and vegetables that inhabit the earth, we discern neither a beginning nor an end ; in the planetary motions where geometry has carried the eye so far, both into the future and the past, we discover no mark either of the commencement or the termination of the present order
Page 116 - (Joule).—When equal quantities of mechanical effect are produced by any means whatever from purely thermal sources, or lost in purely thermal effects, equal quantities of heat are put out of existence or are generated." " Prop. II (Carnot and Clausius).—If an engine be such that when
Page 116 - worked backwards, the physical and mechanical agencies in every part of its motions are all reversed, it produces as much mechanical effect as can be produced by any thermodynamic engine, with the same temperatures of source and refrigerator, from a given quantity of heat.
Page 15 - Fresnel and Fourier to this list of scientific nobles : and by his own inspiring enthusiasm for the great French school of mathematical physics, continually manifested in his experimental and theoretical teaching of the wave theory of light and of practical astronomy, he largely promoted scientific study and thorough appreciation of science in the University of Glasgow.
Page 65 - An application to Terrestrial Temperature, of the principle set forth in the first part of this paper relating to the age of thermal distributions, was made the subject of the author's Inaugural Dissertation on the occasion of his induction to the professorship of Natural Philosophy in the University of Glasgow, in October 1846,
Page 238 - most a few weeks, a surface so cool that it can be walked over with impunity. Hence, after 10,000 years, or indeed, I may say, after a single year, its condition will be sensibly the same as if the actual lowering of temperature experienced by the surface had been produced in an instant, and maintained constant ever after.
Page 108 - La puissance motrice de la chaleur est indépendante des agents mis en œuvre pour la réaliser : sa quantité est fixée uniquement par les températures des corps entre lesquels se fait, en dernier résultat, le transport du calorique.
Page 262 - be magnified in the same proportion. "The magnified structure would be more coarse-grained than a heap of small shot, but probably less coarse-grained than a heap of cricket-balls.
Page 67 - When I entered upon the professorship of Natural Philosophy at Glasgow, I found apparatus of a very old-fashioned kind. Much of it was more than a hundred years old, little of it less than fifty years old, and most of it was worm-eaten. Still, with such appliances, year