1. On the Economy of Single-Acting Expansive Steam-Engines, and Expansive Machines generally; being Supplements to a Paper on the Mechanical Action of Heat

Extract

The author, in the first place, states the equations, which, when used in conjunction with the Tables in the Appendix to the original paper referred to, serve to compute the action of Cornish pumping engines. They are similar in form to those of M. de Pambour, but differ in the expressions for the pressure and volume of steam, and for its expansive action, which the author in the original paper deduced from theory.