...Hartley coaleryi in North- , umberland, as early as 1768, to draw coals out of a pit. It had a toothed ' I mentioned to you a method of still doubling the...and that tolerably easy, by using the power of steam rashing into a vacuum, at present lost. This would do little more than double the effect, but it would...

...late Dr. Small, of Birmingham, dated Glasgow, 28th May, 1769 ; of which the following is an extract. ' I mentioned to you a method of still doubling the...vacuum, at present lost. This would do little more The character of his engines being now fully established by the erection of several large ones in Cornwall,...

...he practised as a physician; he says, " 1 mentioned to you a method of still doubling the effect of steam, and that tolerably easy, by using the power...too much enlarge the vessels to use it all. It is pecu. liarly applicable to wheel engines, and may supply the want of a condenser, where force of steam...

...proposed to avail himself of this property to encrease the effect of his engine, and to save steam. " I mentioned to you a method of still doubling the...steam, and that tolerably easy, by using the power of the steam rushing into a vacuum, at present lost. This would do little more than double the effect,...

...his friend Dr. Small, who had settled at Birmingham, where he practised as a physician; he says, " I mentioned to you a method of still doubling the effect of steam, and that tolerably easy, by using (.lie power of steam rushing into a vacuum, at present lost....

...following is the passage in the letter to Dr. Small, above referred to. The letter is dated the 28th of May, 1769 :— " I mentioned to you a method of still...vacuum, at present lost. This would do little more than considered the discovery of expansion not less important, in an economical point of view, than that...

...the expansion of steam to Dr. Small, he thus writes in a letter dal -d the -28th of May, 176!) :— " I mentioned to you a method of " still doubling the effect of the steam." Mr. Walt then describes the principle, which is too well known to copy, and gives this result : —...

...you a method of still doubling the effect o: [lie steam, and that tolerably easr. by using ill • power of steam rushing into a vacuum. at present lost....but It would too much enlarge the vessels to use it nil. It is particularly applicable to v. li •<•! engines, and may supply the want of a conden.SLr...

...high-pressure expansive engine worth anything which was not either introduced by Englishmen from • " I mentioned to you a method of still doubling the effect of the steam, and that tolerably easy, Inusing the power of steam rushing into a vacuum, at present lost. This would do little more than double...

...his discovery of the expansion of steam to Dr. Small, he thus writes in a letter datod the 28th of May, 1769 :— " I mentioned to you a method of " still doubling the effect of the steam." Mr. Watt then describes the principle, which is too well known to copy, and gives this result : —...