THE 



PHILOSOPHICAL MAGAZINE 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 



AGRICULTURE, MANUFACTURES, 



AND 



COMMERCE. 



BY ALEXANDER TILLOCH, 



HONORARY MEMBER OP THE ROYAL IRISH ACADEMY, 8rC. 3CC. &C. 



« Nee aranearum sane textus ideo melior quia ex se Cla gignunt, nee noster 

 viltoj quia ex alienis libamus ut apes." Josr. Lips. Monit. I'e lit. lib, i. cap. I. 



VOL. XXV. 

 Tot JUNE, JULY, AUGUST, and SEPTEMBER 1806. 



LOND ON: 



Printed by R. Taylor and Co^ 98, Shoe Lane, Fleet Street: 



A-A sold by Messrs. Richardson; Cadell and Davics ; LoHOMAM, 



Hurst, Rees, and Orme; Symonds; Murray; Hioblet : 



Vernor and Hood; Harding; London: Belj. and 



Bkaefute, Edinburgh; Brash and Reid, and 



D. Neviw, Glacgow; and Gilbert 



and Hodges, Dublin. 



1B06. 



