Vol. 40. 



August 1812. 



No. 172. 



Fiiblished the Last Day of every Month^ 

 [PRICE 2s. 6d.] 



THE 



i PHILOSOPHICAL MAGAZINE 



COMPREHENDING 



GEOLOGY, 

 THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 



AGRICULTURE, 



MANUFACTURES AND COMMERCE. 



NUMBER CLXXII. 

 For A UGUST 1812. 



CONTAINING THE FOLLOWING ENGRAVING: 



A Plate to illustrate Mr. Tawney's New Thrashing 

 Machine. 



BT ALEXANDER TILLOCH, 



M.R.I. A. F.S.A. EDIK. AND PERTH, &C. 



LONDON: 



PRINTED BY RICHARD TAYLOR AND CO., SHOE LANE: 



I And sold by Richardsons; Cadell and Da vies; Longman, 

 Hurst, Reks, Orme & Brown ; Murray'; Highleyj Sher-| 

 wood and Co.; Harding; London: Constable and Co. 

 Edinburgh: Brash and Rbid, and D. Niven, Glasgow:, 

 and Gilbert and Hodges, Dublin. 





