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 \ibamus ut apes." Just. Lips, Monti. PoHt. lib. i. cap. i. 



VOL. XXXIII. 



For JANUARY, FEBRUARY, MARCH, APRIL, MAY, 

 and JUNE, 1809. 



LONDON: 



FRINTED BY RICHARD TAYLOR AND CO., SHOE LANE: 



And sold by Richardsons; Cadell and Da vies; Longman, Hcr$T| 



Rees, and Orme; Vernor, Hood, and Sharpe; Murrat; 



Highley; Sherwood and Co.; Harding; London; 



Bell and Bradfute, and Constable and Co. 



Edinburgh: Brasu and Reid, and Niven, 



Glasgow: & Gilbert &HoDGEs,Dublin. 



