A 



JOURNAL 



OF 



NATURAL PHILOSOPHY, CHEMISTRY, 



AND 



THE ART S. 



MARCH, 1802. 



ARTICLE I. 



Defcription of an Engine which operates by the Prejfure and De± 

 J cent of a Column of Water againjl a Pifton ; nearly in the 

 fame Manner as the double Steam Engine operates by Means of 

 Steam. Communicated by the Inventor Mr. Richard 

 Trevithack, of Camborne, near Truro, in Cornwall. 



JLN a late converfation with the inventor of the engine which Application of 

 forms the fubjea of the prefent memoir, the method of apply- fa^notwatniA 

 ing a column of water as a firft mover, by its alternate action a firft mover, 

 upon a pifton in a cylinder, was mentioned by me as likely to 

 prove advantageous in a variety of fituations, and probably to 

 afford as beneficial a refult with regard to power, as any of 

 the other ways of applying a fall of that fluid. It was with 

 no fmall gratification, that I found this fkilful engineer had 

 amply confidered the fubjecl, and had carried it into full effect. 

 I immediately faw, that the communication of refults fo inte- 

 refting and authentic, would be highly acceptable to my 

 readers, and honourable to the Journal. Upon my requeft, 

 he with great readinefs and liberality fupplied me with the 

 drawing exhibited in Plate IX. and had fhe goodnefs to dic- 

 tate the materials, whence the following defcription was 

 made. 



Vol. I.— March. M The 



