Vol. 61, 



March 1823. 



No. 299. 



PublUhed the Last Day of every Month.-Prke 2s. Gd, 



THE 



PHILOSOPHICAL MAGAZINE 



AND JOURNAL: 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE 



THE LIBERAL AND FINE ARTS, 



AGRICULTURE, MANUFACTURES, 



AND COMMERCE. 



NUMBER CCXCIX. 

 For MARCH 1823. 



By ALEXANDER TILLOCH, LL.D. 



«.nl A MO.S. M.A.S. r.S.A. EDIN. AND PERTH; CORRESPONDING MEMBM OF THE 

 aOVAL ACAUEMT OF SCIENCES, MUNICH J AND OF THE ACADEjrr OF SCIENCES, 

 UTERATURK AND ARTS, LEGHORN , ETC. 



A.yD RICHARD TAYLOR, F.L.S. 





LONDON: 



PRINTED BV niCHAKD TAYl.OH, SHOE-LANF. : 



Sold by Cadell ; Lonpnan, Hurst. Recs, ( )rnie ami Brcwn ; Baldwin, Cradock, 

 and Joy; HigWey; Shenvood, Neely, and Jones; llai-dmg: I mlfrwood; 

 Siinpkin and Marshall; London: and by Constable and Co. lulinburtrji ; 

 and Penman, Glasgow. 



