Accurate data for high temperature heat contents and heat capacities of substances are valuable for the study of materials and processes at elevated temperature. The heat contents and heat capacities of solids and liquids above 1000 K are determined experimentally by drop calorimetry and the use has been extended to higher temperatures by using modern techniques for measuring and controlling temperature. The general requirements for the drop method are described in terms of furnace assembly, temperature measurement, calorimeter and sample container. Heat capacities can be determined from relative heat content measurements. Shomate function and qusai-local linear regression (QLLR) are useful to accurately derive the heat capacities from the heat contents. Several applications of the heat content measurements are described.