Abstract
It was found that a Bunsen ice calorimeter modified by the addition of a silvered vacuum jacket was capable of yielding precise values of the total heats of substances. The falling body was contained in a metal capsule to eliminate errors due to radiation and convection during fall. Thermal contact was established in the calorimeter by a copper cup, containing water or mercury, and surrounded by water. The probable error of a single observation of the motion of the mercury thread caused by a hot body was about one part in one thousand. By this method the specific heat of molybdenum was found to be ${c}_{p}=.05973+.00001619t$ mean cal./gm \ifmmode^\circ\else\textdegree\fi{}C between the temperatures of 0\ifmmode^\circ\else\textdegree\fi{}C and 444.5\ifmmode^\circ\else\textdegree\fi{}C.
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