Vol. 41. 



February 1813. 



Puhlished the Last Day of every Month y 

 [PRICE 2s. 6d.] 



THE 



PHILOSOPHICAL MAGAZINE: |^ 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS» 



GEOLOGY, 



AGRICULTURE, 



MANUFACTURES AND COMMERCE. 



NUMBER CLXXVIII. 

 For FEBRUARY 1S13. 



GOJfrAOaJtfG THE FOLLOWING ENGRAVINGS: 

 Diagrams to illustrate Dr. Wollaston's Periscopic Cameraj 



Obscura and Microscope. 

 Count Rum ford's improved Coffee-pots. 



Br ALEXANDER TJLLOCH, 



M.K.I.A. V.S.A. BDIN. AND PCKTH, &C. 



LONDON: 



PKlNTEt) BY RICHARD TAYLOR AND CO., SHOE LANS: 



Andsoldby Richardsons; Cadell and Davies; Longman, 

 Hurst, Rees, Ohme & Brown j Murray; Highley; Sheb-| 

 ■WOOD and Co.; HAROitJuj London; Constable and Co. 

 Edinburgh: Brash and ReiD, and D. Nivkn, Glasgow : 

 and Gilbert and HoDCRs, Dublin. 



