Vol, 



Dec. 1819. 



No. 260. 





Published the LaH Day of every Months 

 [PRICE 2s. «d,] 



THE 



PHILOSOPHICAL MAGAZINE 

 AND JOURNAL: 



COMP»BMBNDINO 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 



GEOLOGY, 



AGRICULTURE, 



MANUFACTURES AND COMMERCE. 



NUMBER CCLX. 

 For DECEMBER 1819. 



BY ALEXANDER TILLOCH, 



M.a.I.A. M.G.S. M.K.A.S. MUNICH, F.8.A. EDJN. ANUPEKTII, &C. 



LONDOISI: 



PRINTED BY RICHARD AND ARTHUR TAVLORj SKOE-iANE ! 



And sold by Cadkll and Davies ; Longman, Hurst, Rets, 

 Orme, & Brown ; Highley; Sherwood and Co.; Harding ;| 



_ Underwood; SiMPKtNand Marshall ; London: Constable! 

 and Co. Edinburgh : Brash and Rj^id; Duncan; nnd Pen- 

 man, Glasgow: and Gilbert vnd Hodges, Dublin. 



