Page:A Letter on the Subject of the Cause (1797).djvu/47

 cold water, the ſteam is as perfectly condenſed as it can be; and the help of a pump joined to this eduction pipe, and a proper valve to open and ſhut alternately between the pump and the cylinder, draws out the condenſed water, and that thrown in by the injection; and alſo the uncondenſible or permanent gas that would impede the working of the Engine. Thus Newcomen’s Engines can be made to act in all reſpects equal, or nearly equal to thoſe made by the Plaintiffs; and from their infinite ſuperiority, in point of ſimplicity and expence, I deem them, in general, more eſtimable.

In order fully to aſcertain the utility or inutility of Condenſers, I have built an Engine for the uſe of my own manufactory, in which I determined to try a condenſer without an Air-Pump; and force out the condenſed water, and uncondenſed vapour, or air, by the influx of the ſteam, as in Newcomen’s. But in this I utterly failed, and with all the ſtratagems my abilities could ſuggeſt, and ſpending money for two months, I could not make the Engine work five minutes together without ſtopping of her own accord. And I conclude that this method is