THE 



PHILOSOPHICAL MAGAZINE: 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 

 AGRICULTURE, MANUFACTURES, 



AKD 



COMMERCE. 



BY ALEXANDER TILLOCH, 



MEMBER OF THE tONDON PHILOSOPHICAL SOCIETY, ETC. ETC. 



" Nee aranearum fane textus id«o laelior, ^uia ex fe fila gignunt. Nee noftet 

 vilior quia mc alienis libamus ut apes." Just. Lips. Men!:. Pilit. lib. i, cap. i. 



VOL. XIV. 





LONDON: 



Printed for Alexander Tillochj 



And SolJ by Meffrs. Richardson, Cornhill ; Cadell and Davik«, StiaHj; 



LoNCMAN and Rkis, Pater-nofter Row; Dpbrett, Piccadilly; 



MuK kAY r.nii HiOHLtY, No. 32, Fleet-ftieet; Symonus, 



Pater-nofter Row; Bel^-, No. 148, Oxford-ftreet , 



Vfrnor and Hood, Poultry ; Harding, No. 36, 



St. James'i-llrcet ; Bkll and Bradfute, 



Edinburgh; Br Aiii and Reiu, Glajgowj 



and W. GiLUFRT, Dublin. 



[Tayhr and Wilkt, Prinltrt, Chaitar^-Lant.'^ 



