THE 



Ihilosophical magazine 



COMPREHENDING 



tHE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 

 AGRICULTURE, MANUFACTURES, 



AND 



COMMERCE. 



BY ALEXANDER TILLOCH, 



MEMBER OF THE LONDON PHILOSOPHICAL SOCIETTi 



" Nec aranearum fane textus Heo melior, quia ex fe fila gignunt. Nee noflfei- 

 vIIioT quia ex alienis libamus ut apes." Just. Lips. Moitit. Polit, lib. i. cap. t i 



VOL. IV. 



LONDON: 



rRlNTED BY J. DAVIS, CHANCERT-LANE, 



For Alexander Tilloch; and fold by Meffrs. RicHARDso.ir, 



Cornhill ; Cadell and Davies, Strand; Deer ett, Piccadilly | 



Murray and Highley, No. 32, Fleet-ftreet ; Stmonds, 



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



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



St. Jaracs's-ftreet; Westley, No. t 59, Strand j 



J. Remnant, High-ftrcet, Bloomlburyj 



aiMi W, REMNANT, Hamburgh, 



