Page:A Letter on the Subject of the Cause (1797).djvu/22

 Engines; there being no method pointed out by which it may be injected, or diſcharged, during the alternate ſtrokes of the Engines: but we are told the Steam muſt be condenſed in veſſels, called Condenſers, which may be wholly diſtinct from, and unconnected with the Steam Cylinder, or may occaſionally communicate therewith. But there is no deſcription of or even, alluſion to, an internal application of cold water, for the purpoſe of condenſation, and how this operation finally ſo eſſential in other Engines, is to be performed by a new method, it becomes every inventor to declare; and alſo to ſhew what condenſers are, as I confeſs I cannot comprehend whether they are Tubes, Boxes, Ciſterns, or what elſe; there being no one ſentence to juſtify a ſpecific concluſion on the ſubject.

Article, ſets forth that Pumps are to be uſed for extracting the uncondenſed Vapour, but as in all the foregoing inſtances, the leaſt trace of their ſituation, dimenſions, conſtruction or action is not mentioned; every Engineer muſt diſcover the beſt he can, and apply it as his own ingenuity directs; the writer of the Specification having thought proper to reſerve this ſecret for his ſole uſe. Article