THE 



PHILOSOPHICAL MAGAZINE 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 

 AGRICULTURE, MANUFACTURES, 



AND 



COMMERCE. 



BY ALEXANDER TILLOCH, 



MEMBER OF THE LONDON PHILOSOPHICAL SOCIETY, ETC. ETC. 



" Nee aranearum fane textus ideo melior, quia ex fe fila gignunt. Nee nofter 

 vilior quia ex alienis libamus ut apes." Just. Lips. Monti. Polit. lib. ». cap. i. 



. \ VOL. VIII. 





LONDON: 



PRINTED BY DAVIS, TAYLOR, AND WILKS, CHANCERY-LANE, 



For Alexander Tilloch ; and fold by Meflrs. Richardson, 



Cornhill; Cadell and Davies, Strand ; Debrett, Piccadilly ; 



Murray and Hichlev, No. 32, Fleet-ftreet ; Symonds, 



Pater-nofter Row; Bell, No. 148, Oxford-ftrect ; 



Vernor. and Hood, Poultry ; Hardinc, No. 36, 



St. James's-ftreet ; Bell and Bradfute, 



Edinburgh; Brash and Rud, Glafgow; 



and W. Giljert, Dublin. 



