The following are several pages taken from the above mentioned book. A similar explanation is more or less copied in “Power’s Principles of Refrigeration” of which I have a 1921 copy. Take special note of the beautiful illustration below. Clicking on it should provide a larger version. I’ve seen outlines comparing mechanical refrigeration to water pumps in the sense that they both require work to lift, pump or otherwise increase a potential, but never to the great painstaking detail as is laid out in the following pages.
The book was short, but a joy to read. The whole thing was written in this very simple, straight forward language; gradually building on ideas throughout it’s pages.
M.C. Pletcher
musings on entropy 
Questions or Comments?