Heat-Engines and Saline Solutions.

Abstract

MR. MACFARLANE GRAY (p. 414) appears to call in question my assertion that in a vapour-engine a saline solution may take the place of a simple liquid when it is desired to replace water by a substance of less volatility, and that the advantage which Carnot proved to attend a high temperature can thus be attained without encountering an unduly high pressure. He contends that “the saline mixture is not the working substance. Carnot's law refers to the working substance only, and not to anything left in the boiler.”