Vol. 7. 



!^ 



Published the First Day of every Mo7ith. — 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» 42.— J U N E 1830. 



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. 



HonDon : 



I-niNTED BY AND FOR RICHARD TAYLOR, RED LION COURT, FLEET STREET, 



Printer to the University of London. 

 Sold by Longman, Rees, Orme, Bro\vn, and Green ; Baldwin and Cradock ; 

 t:adcll; sTierw cod, 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'Artliur, Dublin. 



