Vol. 54. 



Sept. 1819. 



Published the Last Day of every Month. 

 [PRICE 2s. 6d.] 



THE 



PHILOSOPHICAL MAGAZINE 

 AND JOURNAL: 



COMPEEHENDINO 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 



GEOLOGY, 



AGRICULTURE, 



MANUFACTURES AND COMMERCE. 



NUMBER CCLVII. 

 For SEPTEMBER 1819. 



WITH AN ENGRAVING BY PORTER 



Illastrative of Mr. Hare's Calormiotor, a new Galvanic 

 Instrujnent. 



BY ALEXANDER TILLOCH, 



M.n.I.A. M.a^S. M.R.A.S. MUNICH, F.S.A. EDIN. AND PERTH, ,&C. 



LONDO N: 



PRINTED nv RICHARD AND ARTHUR TAYLOR, SHOE-LANE : 



And sold by Cadell and Davies ; Longman, Hurst, Rees, 

 Ormc, & Brown; Highley; Shf.rwood and Co.; Harding ;ffl 

 UNDtRW'ooD; SiMPKiNandMARSHALL ; London: Constable K^^ 

 and Co. Edinburgh: Brash and Rein; Duncan; and Ten- ^^5^ 

 MAN, Ghisgow: and GibUERT and Hodges, Dublin. 



"-t^V- 



