June 1823, 



No. S02. 



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 CCCII. 

 For JUNE 1823. 



By ALEXANDER TILLOCH, LL.D. 



H.R.I.A. M.G.S. M.A.S. F.S.A. EDIN. AND PERTH; CORRESPONDING MEMBER OF THE 

 ROVAL ACADEMY OF SCIENCES, MUNICH; AND OF THE ACADEMY OF SCIENCES, 

 I.1IERATDKE AND ARTS, LEGHORN, ETC. 



A.yD RICHARD TAYLOR, F.L.S. 



MEMBER OF THE ASTRONOMICAL SOCIETY OF LONDON. 



ALt'Ri: f M-AMMVM. 



LONDON: 



PRINTED BY RICIIAUD TAYLOU, SHOE-LANE." 



Sold by Cadell ; Longman, Hurst, Rees, Ornic, and Brown; Biildwin, Cradock, 

 and Joy; Ilighley; Sherwood, Neely, and Jones; Hardinj;; Underwood; 

 Simpkin and Marshall; London: — and by Constable and (.'o. Edinburgh; 

 and Penman, Glasgow. 



