FEBRUARY 1831. 



Published the First Day of every Month. Price 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. 



NO 50. F E B R U A R Y 1831. 



BY 



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



AND 



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



Lcm&on : 



PRINTED MV AND *OR RICHARD TAYLOR, RED LION COURT, FLJSBT STREET, 



Printer to the University of London. 



Sold by Longman, Rees, Onne, Brown, and Green ; Baldwin and Cradock ; 

 Cadell; Sherwood, Gilbert, and Piper; Simpkin and Marshall ; Under- 

 wood; and S. Highley, London : and by Adam Black, Edinburgh ; Smith 

 and Son, Glasgow : and Hodges and M* Arthur, Dublin. 



