Vol. 64. August 1824. 



No. 316. 



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, MANUFACTURES, 



AND COMMERCE. 



NUMBER CCCXVI. 

 For AUGUST 1824. 



By ALEXANDER TILLOCH, LL.D. 



M.R.I. A. F.S.A. EMN. AND PERTH; CORRESPONDING MEMBER OF THE ROYAL 



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



LITERATURE AND ARTS, LEGHORN, ETC. 



And RICHARD, TAYLOR, F.L.S. 



MFMBER OF THE ASTRONOMICAL SOCIETY OF LONDON; OF THE METEOROLO- 

 GICAL society; and of the royal Asiatic society 



OF GREAT BRITAIN AND IRELAND. 



LONDON: 



FRINTI'.O BY RICHARD TAYLOR, SHOE-LANE : 



Sold by Cadell ; Longman, Hurst, Rees, Orine, Brown and Green ; Baldwi n, 

 Cradock, and Joy; Ilighley; Sherwood, Jones, and Co.; Harding; Under- 

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

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