APRIL 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. 

 N 52. A P R I L 1831. 



BY 



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



AND 



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



Lou&on : 



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



Printer to the University of London. 



Sold by Longman, Rees, Orme, 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. 



