‎"JOULE, JAMES PRESCOTT.‎
‎New Determination of the Mechanical Equivalent of Heat. Received November 15, 1877, - Read January 24, 1878.‎

‎(London, Harrison and Sons, 1879). 4to. No wrappers as extracted from ""Philosophical Transactions"" 1878 - Vol. 169 - Part II. Pp. 365-383 and 1 lithographed plate. Clean and fine.‎

Reference : 42340

‎First appearance of an importent paper, having the same title as his famous paper from 1845, in which he discusses problems relating to his discovery of the first law of thermo-dynamics and the principle of the conservation of energy.""In December of 1840 he presented a paper to the Royal Society on the production of heat by the electric current. His course of thought led him to the consideration of the relatio between heat and and mechanical work. The results of his investigations were embodied in a series of papers which culminated in his great memoir on the mechanical equivalent of heat, published in 1850. Joule was one of the founders of the principle of the cosservation of energy. Some of his work was done in collaboration with Lord Kelvin.""(Source Book in Physics p. 203).‎