THE 



PHILOSOPHICAL MAGAZINE 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 



AGRICULTURE, MANUFACTURES, 



AND 



COMMERCE. 



BY ALEXANDER TILLOCH, 



EJOKORARY MEMBER OF tSe ROYAL IRISH ACADEMY, &C. &C. ScC, 



«' Nec araneariim sane textus ideo melJor quia ex se fila gignunt, nee noster 

 vilior quia ex allenii libamus ut apes." Just. Lips. Monk. FoHu lib. i. cap. I. 



VOL. xxr '-^'' "^^^ ^ 





L ON D O N: 



Printed by R. Taylor and Co., 38, Shoe Law, Fleet Street: 



.nd sold by Messrs. Richardson; Cadell and Davies; Longman, 



Hurst, Rees, and Ormk; Svmonds; Murrav; Highley ; 



ViRNOR and Hoon ; Harding; London: Bell and 



BRADFUTr, Edinburgh; Brash and Reid, and 



D. Nevin, Glasgow; and Gilbert 



and Hodgeb, Dublin. 



1805. 



