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 node* 

 vilior <juia ex alienis libamus ut apes." Just. Lifs. Monit. P§lit. lib. i. cap. I, 



VOL. X. 





LONDON: 



FRINTED BY DAVIS, WILKS, AND TAYLOR, CH ANC ER Y-L AVU, 



For Alexander Tilloch ; and fold by Meffrs. Richardsok, 



Cornhill; Cade ll and Davie s, Strand ; De b re tt, Piccadilly; 



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



Pater-nofier Row; Bell, No. 148, Oxford-ftreet ; 



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



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



Edinburgh; Brash and Reid, Glafgow; 



and W. Gilbert, Dublin. 



