TY - JOUR T1 - On the Mechanical Equivalent of Heat JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 140 SP - 61 EP - 82 PY - 1850/01/01/ UR - http://dx.doi.org/10.1098/rstl.1850.0004 M3 - doi:10.1098/rstl.1850.0004 AU - Joule, J. ER -