On the measurement of the variation of the specific heat of Aniline with temperature, using the continuous flow electric method

These experiments were undertaken in order to obtain reliable data on the variation of the specific beat with temperature of a liquid of low vapour pressure, in the neighbourhood of its freezing point. The employment of a continuous flow method required large quantities of the liquid, and aniline was chosen as it was thought that it could be procured in bulk, pure and dry. Unfortunately, this proved less easy than was anticipated and was one of the chief difficulties encountered. In addition, the viscosity of aniline increases very rapidly below about 10° C., which caused some uncertainty below this temperature. Most of the ordinary laboratory materials are slowly attacked by aniline ; the earlier apparatus was constructed without rubber, and this necessitated the use of a hermetically sealed calorimeter. Subsequently a good quality rubber was found that withstood the action of aniline, and this greatly simplified the mechanical difficulties.