August 1828. 



m^Mm^mm^^l^ 



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



THE 



PHILOSOPHICAL MAGAZINE 



AND 



ANNALS OF PHILOSOPHY: 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, THE LIBERAL 



AND FINE ARTS, AGRICULTURE, MANUFACTURES, 



AND COMMERCE. 



NEW SERIES. 

 N<> 20.— A UGUST 1828. 



BY 



RICHARD TAYLOR, F.S.A. F.L.S. M. Astr. S. &c. 



AND 



RICHARD PHILLIPS, F.R.S. L. & E. F.L.S. &c. 



Ecnticm : 



PRINTED BY AND FOR RICHARD TAYLOR, RED LION COURT, FLEET STREET : 



And sold by Baldwin and Cradock ; Longman, Roes, Orine, Brown, and 

 Green; Cadell; Sherwood, Gilbert, and Piper; Simpkin and Marshall; g^ 

 Underwood ; W. Phillips ; Harding; Highley: — and by Adam Black, Edin- 5 

 burgh ; Smith and Son, Glasgow: and Hodges and M'Arthur, Dublin. 



JffMTgfiWi 



^ffeMf^ffffi^Sfi 



