Page:A Letter on the Subject of the Cause (1797).djvu/94

 occaſioned this miſapplication, by calling ſuch, ſhoemakers, blockheads, fools, &c. for not diſcovering what has coſt him, with all his retinue, twenty three years, and is ſtill ſhort of perfection.

The following will appear to your Lordſhip a condenſation of my ideas, diffuſed through this letter, on the conſtruction of Steam Engines, and which my experience juſtifies.

No Steam Engine can poſſibly be made to work without a pump, if the ſteam is condenſed in any veſſel, where the piſton does not act; that veſſel being ſeparated from the ſteam cylinder.

No Engine can poſſibly work properly, except the dimenſions of the pump much exceed the cavernous parts, into which the ſteam has acceſs, between the ſteam cylinder and the pump.

All kinds of condenſers, and even eduction pipes, on the principle of Watt’s Engines, impede the working of the Engines, in a ratio as their proportion to the air pump.