THE 



PHILOSOPHICAL MAGAZINE; 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, 



THr I>IBERAL AND FINE ARTS, 



GEOLOGY, 



AGRICULTURE, 



MANUFACTURES AND COMMERCE. 



BY ALEXANDER TILLOCH, 



A4.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 ut apes." Just. Lips. Monit. Ptitt. lib. i. cap. i. 





- ___P^ VOL. XLI. 



For JANUARY, FEBRUARY, MARCH, APRIL, MAY, met 

 JUNE, 1813. 



LONDON: 



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