THE 



PHILOSOPHICAL MAGAZINE: 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 



AGRICULTURE, MANUFACTURES, 



AND 



COMMERCE. 



BY ALEXANDER TILLOCH, 



M.R.I.A. F.S.A. Edin. and Perth, &c. 



" Nee aranearum sane textus ideo melior quia ex se fila gignunt, nee noster 

 vilior quia ex alienis libamus uNapes." Just. Lips. Monk. Folit. lib. i. cap. i. 



VOL. XXXIII. 



For JANUARY, FEBRUARY, MARCH, arid APRIL, 1809. 



L OND ON: 



PRINTED BY RICHARD TAYLOR AND CO., SHOE LANE: 



And sold by Richardson?; Cadell and Da vies; Longman, Hurst, 



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