THE 
PHILOSOPHICAL MAGAZINE: 
COMPREHENDING 
THE VARIOUS BRANCHES OF SCIENCE, 
THE LIBERAL AND FINE ARTS, 
GEOLOGY, 
AGRICULTURE, 
MANUFACTURES AND COMMERCE. 
BY ALEXANDER TILLOCH, ° 
MRA. F.S.A. Epin. anp Pertu, &c. 
er EE RS as ne 
<¢ Nec atanearum sane textus ideo melior quia ex se fila gignunt, nec noster 
witior quia ex alicnis libamus ut apes.” Jusr. Lars. Monit, Polit. ib. i. cap. 16 
ee 
VOL. XLII. 
for JULY, AUGUST, SEPTEMBER, OCTOBER, NOVEMBER, 
Shira Cis and DECEMBER, 1818. 
: 
‘YR We 
LONDON: 
PRINTED BY RICHARD TAYLOR AND CO., SHOE LANE: 
Aad sold by Ricuarpsons; CapeLt and Davies; Lonoman, Hurst, Rees, 
Orme, and BrowN; Murray; Hicurey; Suerwoop and Co.; 
Harvinc; London: Consrasre and Co. Edinburgh; 
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& Girgert & Hopees, Dublin. 
