A History of Science — Volume 3
Chapter 19
THE CONSERVATION OF ENERGY
(1) (p. 267). The Forces of Inorganic Nature, a paper by Dr. Julius Robert Mayer, Liebig's Annalen, 1842. (2) (p. 272). On the Calorific Effects of Magneto-Electricity and the Mechanical Value of Heat, by J. P. Joule, in Report of the British Association for the Advancement of Science, vol. XII., p. 33.