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THE 



S PHILOSOPHICAL MAGAZINE: 



COMPREHBITOING 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 



AGRICULTURE, MANUFACTURES, 



AND 



COMMERCE. 



. < II I I ■! I I * ' 111 life 



NUMBER CXXXIX. 

 • For NOVEMBER 1809. 



CONTAINING THE FOLLOWING ENGRAVINGS: 

 . I'iate to Uluslrate Messrs. Allen and Pepys' new Experi- 

 ments on Respiration. Engraved by Porter. 



A I'iate to illustrate M. Hacy's Grystallography. 



w 



BT ALEXANDER TILLOCH, 



M.K.I. A. P.S.A. EDIN. AND PERTH. &C. 



LONDON.- 



PRINTBD BTt RICHARD TAYLOR AND CO., SHOE LANE: 



Andsoldby Ricuardsons; Cadell and Davibs; Longman, 

 HuHST, Rbes, and Orme; Vernor, Hood, and Sharpb; 

 MuRPAY; HiGULEY; Sherwoob and Co.j Harding; London 

 Bbll and Bradpute, and Constable and Co. Edinburgti:! 

 Brash andREiD, and D. Nivem, Glasgow : and Gilbert and 

 Hodges, Dublin. 



