An adiabatic calorimeter for measuring the specific heats of liquids in the range 0 to 100 C

A calorimeter of the adiabatic type is described, capable of measuring the specific heats of liquids within small temperature intervals (2 or 3° C) over the range 0 to 100° C. An accuracy of ±0.5% can be maintained throughout the full working range, with a small increase in precision between 10 and 30° C. Features of the design include: an electrically heated annular metal jacket; stirring of the calorimetric fluid (125 ml.) by an oscillation of the calorimeter about its vertical axis (this has certain advantages over the conventional motor-driven shaft and paddle); a calorimeter heater design giving wide dispersal of heat without local overheating; ease of assembling and dismantling. Primarily designed for measurements on liquid dairy products, it can be used for other liquids. Typical results with the former are illustrated.