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. 



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

 vilior quia ex alienis libamus ut apes." Just.Lifs. Manit. Pdit. lib. i. cap. I . 



VOL. III. 



LONDON: 



Printed for Alexander Tilloch ; and fold byMeflYs. Richardson, 



Cornhill ; Cadi ll and Davies, Strand ; Dbbrftt, Piccadilly j 



Murray and Higiiley, -No. 32, Fieet-ftreet ; Symonds, 



Paternofter-Row ; Bell, No. 148, Oxford-ftreet ; 



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



St. James's- ftreet; Westley, No. 159, Strand; 



J. Remnant, High-ftrcet, Bloomfbury ; 



and W. Remnant, Hamburgh. 



