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THE 



PHILOSOPHICAL MAGAZINE 



COMPREHEKOINO 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 



AGRICULTORE, MANUFACTURES, 



COMMERCE. 



NUMBER CXXXVI. 

 For AUGUST 1809. 



CONTAINING THE FOLLOWING ENGRAVINGS: 

 I, 2. A Quarto and an Octavo Plate descriptive of Mr. TROtJGH- 

 ton's new dividing Iiiotrument. 



BT ALEXANDER TILLOCH, 



M.R.I. A. V.r.A. EDIN. AND PERTH, &C. 



LONDON: Ka 



PRINTED iX RICHAKD TAYLOR AMD CO., SHOE LANE: ' J^S 



And sold by RiCHAKnsoNi; Cadell and Davibs; Longman, 

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 Hodges, Dublin. 



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