Vol. 7. 



May 1830. 



No. 41 



mM^im^i^ 



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°4I.— M AY 1830. 



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. 



HonDori : 



I'HINTED LV AND FOR lUCHAUD TAYl.OK, HEX) LION COURT, IXLtT STBEET; 



Printer lo Ihe University of London, 

 Anil sold by lialdwin and (Jradock ; Longman, Ilecs, Ornic, lirown, and 

 Cirecn; Oadell; Hiierwood, Gilbert, and Piper; Simpkin and Marsliall; 

 Underwood ; Mighley : — and iiy Adam LMack, Edinburgh ; Sinitli and Son, 

 Glasgow : and Ifodges and M'Arthur, Dublin. 



