Vol. 62. 



JutY 1823. 



published the Last Day of every Month. — Price 2s. 6d 



THE 



iPHILOSOPHICAL MAGAZINE 

 AND JOURNAL: 



, COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 



AGRICULTURE, MANUFACTURES, 



AND COMMERCE. 



NUMBER CCCIII. 

 For J U L Y 1 823. 



WITH A PLATE 

 ■ Illustrative of Professor Hare's Comrriunications on Electricity, 

 and on the Self-acting Blowpipe. 



By ALEXANDER TILLOCH, LL.D. 



K.K.I.;». M.G.S. M.A.S. r.S.A. EDIK. AND PERTH; CORRESPONDING MEMBER OF THB 



KOVAL ACADEMY OF SCIENXES, MUNICH; AND OF THE ACADEMY OF 



SCIENCES, UTEttATUKE AND ARTS, lEGHORN, ETC. 



And RICHARD TAYLOR, F.L.S. 



IIEMBSK or THE A8IR0K0HICAL SOCIETT OF LONDON, AND OF THE ASJATIC SOCirXT 

 OF GKIAT BRITAIN AND IRELAND. 



AT.1(KC J\ri.A»l.«l.\M. 



LONDON: 



' PAINTED BT BICUARD TAYLOR, 8II0E-I.ANI: : 



Sol.i by Cadell ; Longman, Hurst, Rcca, Orme, and Brown ; Baldwin, Cradock, 

 and Joy; Highley; Sherwood, Ncely, and Jones; llardins;; Underwood; 

 Siuif)kin and Marsliull; London: — and by Constable and Co. Edinburgh; 

 and Penman, Glasgow. 



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