Voi, 55. Feb. 1820, No. 262. 



Published the Last Day of ever ij Month^ 



CPRICE 2s. 6d.] ^^^ 





THE 



PHILOSOPHICAL MAGAZINE 1 

 AND JOURNAL: 



COHFRBHBNOING 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL ANP FINE ARTS, 



GEOLOGY, 



AGRICULTURE, 



MANUFACTURES AND COMMERCE. 



NUMBER CCLXIL 

 For FEBRUARY 1820. 



WITH A PLATE BY PORTER 

 Illustrative of the Annular Eclipse of the Sun on the Vtli 

 of September next. 



BY ALEXANDER TILLOCH, 



llf.I».I.A. M.G.S. M.ll.A.S. MUNICH, F.«.A. EDJN. AND PElU'tr, &0. 



LONDO N: 



PRIKTEfr^Y-UCHA&O AND ARTHUR TAYLQA,.SHOE.LAN^ : 



And sold by CaIiell and Da ties ; Longman, Hujist, IIees, 

 Orme, & Brov/k; Hiohley; Sherwood and Co. ; Harding;! 

 Underwood; SiMp'riNand Marshall ; London: Constablh' 

 arid Co. Edinburgh r Brash and Reid; Duncan; and Pen- 

 MAK, Glasgow: and Gilbert and Hodges, Dublin. 



