Vol. 62. 



October 1823. 



No. S06. 



i 



PublisJied the Last Day qfeveiy Month- 



\TUY. 



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aiS 



IPHILOSOPHICAL MAGAZINE 



AND JOURNAL: 



.■-=-■■■ ■■ 'f^.'^- 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, 

 M THE LIBERAL AND FINE ARTS, 



AGRICULTURE, MANUFACTURES, 

 AND COMMERCE. 



I 



NUMBER CCCVL 

 For OCTOBER 1823. 



WITH A PLATE 

 Illustrative of M. Becquerel's Experiments on the Develop- 

 ment of Electricity by Pressure. 



By ALEXANDER TILLOCH, LL.D. 



M.K.I.A. M.G.S. M.A.S. F.S.A. EDIN. AND PERTH; CORRESPONDING SIEMBER OF THB 



KOVAL ACADEJiy OF SCIENCES, ItONICH; AND OF THE ACADEMT OP 



SCIENCES, LITERATURE AND A»IS, LEGHORN, ETC. 



And RICHARD TAYLOR, F.L.S. 



MEMBER OF THE ASTRONOMICAL SOCIETY OF LONDON, AND OF THE ASIATIC SOCIETY 

 OF GREAT BRITAIN AND IRELAND. 



AIXKI: (vtAMM.NM. 



LONDON: 



rHINTED BY niCHARD TAYLOU, SHOE-LANE : 



Soltl hyCadcll; Longman, Hurst, Roes, Ornic, Brown and Green; Baldwin, 

 Cradock, and Joy ; Hijjhlcy; Slierwood, Jones, and Co. ; Harding;; Under- 

 wood ; S'ntpkin and Marshall ; London : — and by Constable and Co. Edin- 

 burgh ; and Penman, Glasgow. 



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