THE 



PHILOSOPHICAL MAGAZINE 



COMPREHENDING 



G E O L O G Y, 



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 arinfarum lane textus idco melior quia ex se fila gignunt, nee noster 

 vilior quia ex alienis libarnu^ ut apea." Jusr. LI^s. Aifomt. Ftiit, lib. i. cap. i. 



VOL. XL. 



For JULY, AUGUST, SEPTEMBER, OCTOBER, NOVEMBER, 

 and DECEMBER, 1812. 



LONDON.- 



PHINTfcn BY RICHARD TAYLOR AND CO., SHOE LANE: 



Ard »i)l(l by RiciiARDSoNs; Cadei.l and Davies ; I.oncman, Horst, Re«» 



ORMe, and Brow.s ; Murkat; Higiilet; Sjerwood and Co.; 



Harding; London; Constable and Co. Edinburgh: 



Bhasu and Run, and Niven, Glasgow: 



Ic CiLBj^ju;AJ^oBCK9, Dublin. 



