Vol. 10. 



July 1831. 



No. 55. 



Piihlished 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"55.— JU LY 1831. 



WITH AN ENGRAVING 



Illustrative of Mr. Sturgeon's Experiments on the Thermo- 



Magneiism of Homogeneous Bodies. 



BY 



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



AND 



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



ri-AMMAM 



lonDovi : 



MIINTEU BY AND TOK. KICHABD TAYLOR, llED LION COURT, FLEET STREET, 



Printer to the University of London. 

 Sola by Longman, Rees.Ornie, Brown, and Green; Baldwin and Cradoek ; 

 CadcU- Sl.crwood, Gilbert, and Piper; Sinipkm and Marsl.al ; Lnder- 

 wood • 'arul S. Highley, London :-and by Adam Black, Edmbu.gh ; bnuth 

 and Son, Glasgow: and 1 lodges and M'Aitluir, Dublin- 



