THE 
PHILOSOPHICAL MAGAZINE 
“AND JOURNAL: 
COMPREHENDING 
afte ye 
THE VARIOUS BRANCHES OF SCIENCE, 
THE LIBERAL AND FINE ARTS, 
~ 
GEOLOGY: 
AGRICULTURE, 
MANUFACTURES, AND COMMERCE. 
BY ALEXANDER TILLOCH, LL.D. 
M.R.I.A. M.G.S. M.A.S. F.S.A. EDIN. AND PERTH 5 CORRESPONDING MEMBER 
OF THE ROYAL ACADEMY OF SCIENCES, MUNICH; AND OF THE ACADEMY 
OF SCIENCHS, LITERATURE AND ARTS, LEGHORN, &c. &c. &c. 
“ Nec aranearum sane textus ideo melior quia ex se fila gignunt, nec noster vilior quia 
ex alienis libamus ut apes.”’ Just. Lirs. Monit. Polit. lib. i. cap. 1. 
ee 
VOL. LIX. 
For JANUARY, FEBRUARY, MARCH, APRIL, MAY, and 
Lisi TUNE, 1822. 
aye Mel 
> radi) 
Qe wt? LOND ON: 
"0 
PRINTED BY RICHARD AND ARTHUR TAYLOR, SHOE LANE: - 
And sold by Capert; Loncman, Hurst, Rees, Orme, and Brown; 
HicuLey; Suerwoop and Co.; Haxvinc; UNpERWoOD; SIMPKIN 
and Maxsuaczt, London: Consrasie and Co, Edin- 
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