Vol. 33. 



January 1809 



129. 



• - 



Published lift Last Day of every Monlb, 

 [PRICE 2s. Q ] 





If -•; 



55 





THE 



PHILOSOPHICAL MAGAZINE 



CO MP HE H ENDING 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 



AGRICULTURE, MANUFACTURES, 



AND 



COMMERCE. 





JEfa. 



NUMBER CXXIX. 

 For JANUARY 1809. 



CONTAINING -LLC WING ENGRAVINGS: 



M. James Elmes's Portable Bridj 



Mr. Knight's new Method of training Fruit Trees j— and 

 iell's Figure:? of the Comet of 1807. 



BT ALEXANDER TIL L O C H t 



M.R.I. A. F.S.A. EDIN. AND PERTH. &C. 



..' 



LONDON.- 



PRINTED BY RICHARD TAYLOR AND CO,, SHOE LANE: 



\ndgoldby Richardsoksj Cadsll. and Daviesj Longman, 

 Hurst, Bees, and Orme; Vernor, Hood, and Sharpe; 

 Murray} Highleyj Sherwood andCo.j Harding; London : 

 Bell and Bradfutb, and Constable and Co. Edinburgh: 

 Brash andREiD, and 1). NlVEtf, Glasgow: and Gilbert and 

 Hodges, Dublin. 



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