September 1824. No. 317 



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



THE 



PHILOSOPHICAL MAGAZINE 



AND JOURNAL: 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, 



Tx.E LIBERAL AND FINE ARTS, 



AGRICULTURE, MANUFACTURES, 



AND COMMERCE. 



82 



NUMBER CCCXVII. 

 For SEPTEMBER 1824. 



By ALEXANDER TILLOCH, LL.D. 



M.R.I.A. F.S.A. EDIN. AND PERTH; CORRESPONDING MEMBER OP THE ROYAL 



ACADEMY OF SCIENCES, MUNICH; AND OF THE ACADEMY OF SCIENCES, 



LITERATURE AND ARTS, LEGHORN, ETC. 



And RICHARD TAYLOR, F.L.S. 



MEMBER OK THE ASTRONOMICAL SOCIETY OF LONDON; OF THE METEOROLO- 

 GICAL SOCIETY ; AND OF THE ROYAL ASIATIC SOCIETY 

 OF GREAT BRITAIN AND IRELAND. 



LONDON: 



PRINTED BY RICHARD TAYLOR, SHOE-LANE : 



ijSold byOaddll Ldngman, Hurst, Rees, Orme, Brown and Green; Baldwin, 

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

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