Memoirs and Proceedings of the Manchester Literary & Philosophical SocietyThe Society, 1892 |
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accepted apparatus appear atmosphere atoms attraction through space battery body British Association brother caloric Carnot's theory chemical Clausius combustion condensation conservation of energy contains conversion of heat converted definite degree determination dynamical theory elastic electric action electro-magnetic engine electrolysis electromotive force equivalent of heat experimental expressed Fahrenheit Faraday fluid FORCE AND HEAT friction gases heat developed heat evolved heat produced hypothesis important interest JAMES PRESCOTT JOULE Joule Joule's discovery Joule's law JOULE'S VIEWS latent heat living force magnetic magneto-electrical Manchester mathematical matter mechanical action mechanical effect mechanical equivalent mechanical philosophy mechanical power meeting Memoirs motion Oakfield observed obtained oxygen P. G. Tait particles phenomena pressure proportional published quantity of heat Rankine Rankine's received recognition Regnault's resistance Royal Society scientific Scoresby showing Sir William Thomson specific heats steam engine theory of heat thermal Thermo-dynamics tion velocity vis viva viva voltaic weight zinc
Popular passages
Page 112 - This I endeavoured to do, and, discussion not being invited, the communication would have passed without comment if a young man had not risen in the Section, and by his intelligent observations created a lively interest in the new theory. The young man was William Thomson...
Page 69 - That the quantity of heat produced by the friction of bodies, whether solid or liquid, is always proportional to the quantity of force extended.
Page 192 - I shall lose no time in repeating and extending these experiments, being satisfied that the grand agents of nature are, by the Creator's fiat, indestructible', and that wherever mechanical force is expended, an exact equivalent of heat is always obtained.
Page 111 - It was in the year 1843 that I read a paper ' On the Calorific Effects of Magneto-Electricity and the Mechanical Value of Heat ' to the chemical section of the British Association assembled at Cork.
Page 125 - ... spent in conducting heat through a solid, what becomes of the mechanical effect which it might produce? Nothing can be lost in the operations of nature — no energy can be destroyed. What effect then is produced in place of the mechanical effect which is lost? A perfect theory of heat imperatively demands an answer to this question; yet no answer can be given in the present state of science.
Page 75 - ... oxygen ; so that the whole heat of the system must still be referred to the chemical changes. But if the animal were engaged in turning a piece of machinery, or in ascending a mountain, I apprehend that in proportion to the muscular effort put forth for the purpose, a diminution of the heat evolved in the system by a given chemical action would be experienced.
Page 193 - The contact theory,' he urged, ' assumes that a force which is able to overcome powerful resistance, as for instance that of the conductors, good or bad, through which the current passes, and that again of the electrolytic action where bodies are decomposed by it, can arise out of nothing : that without any change in the acting matter, or the consumption of any generating force, a current shall be produced which shall go on for ever against a constant resistance, or only be stopped, as in the voltaic...
Page 194 - ... takes place. So we can change chemical force into the electric current, or the current into chemical force. The beautiful experiments of Seebeck and Peltier show the convertibility of heat and electricity ; and others by Oersted and myself show the convertibility of electricity and magnetism. But in no case, not even in those of the Gymnotus and Torpedo, is there a pure creation or a production of power without a corresponding exhaustion of something to supply it.
Page 124 - In the present state of science, however, no operation is known by which heat can be absorbed into a body, without either elevating its temperature or becoming latent, and producing some alteration in its physical condition ; and the fundamental axiom adopted by Carnot may be considered as still the most probable basis for an investigation of the motive power of heat ; although this, and with it every other branch of the theory of heat, may ultimately require to be reconstructed on another foundation,...
Page 7 - We might reason, d priori, that such absolute destruction of living force cannot possibly take place, because it is manifestly absurd to suppose that the powers with which God has endowed matter can be destroyed...