A 



JOURNAL 



OF 



NATURAL PHILOSOPHY, CHEMISTRY, 



AND 



THE ARTS. 



MA Y, 1802. 



ARTICLE I. 



Improvements in the Hydraulic Engine of Schemnit*z, ana 

 that of Mr. Goodwyn; with comparative Remarks on the 

 moft ufeful Applications of each, and fome Facts relative to the 

 Invention of the preffure Engine. In a Letter from M\\ 

 John Whitley Boswell. 



To Mr. NICHOLSON. 

 S I R, 



London, March 14. 1802. 



AVING, with much fatisfaction, found that the method Method of 



H 



of making the Schemnitz hydraulic engine work itfelf, which working engines 

 t r , , , , . .-.'• by the bucket 



I gave you lor your excellent Journal in J 800, (IV. 1 17.) and fyphon. 



has been iince found of confiderable utility in * other works of 



a fimilar nature, I am induced to fend for your approbation a 



draft of the f application of the fame principle to Mr. Good- 



* Vide Mr. Clofe's papers in the fame Vol. 



f The paper figned L in the quarto Journal, page 343, though 

 it profeffes to (hew how Mr. Goodwyn 's engine may work itfelf, 

 has only hinted at this method, but has not (hewn how it may be 



effeaed. 



Vol. II.— May, 1802. B wyn's 



