Vol. 66 



No. 327 



Published the Last Day of every Month.— Price 2s. 6d. 



THE 



PHILOSOPHICAL MAGAZINE 



AND JOURNAL: 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 

 AGRICULTURE, MANUf^TURES, 

 AND COMMERCE. ,i«^l 



NUMBER CCCXXVIL 

 For J UL V 1825. 



By RICHARD TAYLOR, I'.L.S. 



MEMBBK OF THE >'sTKON0MICAr. SOCIETY OK LONDON ; OP THE METK0H0LO- 

 GICAL ^^CIETY; AND OP THE ROVAL ASIATIC SOCIETY 

 OF OaF.AT BRITAIN AND IRELAND. 



LONDON: 



I'niNTF.D DY niCHAED^TAYt.OR, SHOE-I.AKE : 



Sold by Cadell; Longman, Hurst, Rees, Drnie, Brown and Green; Baldwin, 

 Cradock, and Joy ; Hishley ; Sherwood, Gilbert, and Piper ; Hardingt Under- 

 wood; Simpkin and Marshall ; London :— and by Constable and Co. Edin- 

 burgh ; ancf Penman, Glasgow. 



