THE 



PHILOSOPHICAL MAGAZINE: 



COMPREHENDING 



THE VARIOUS BRANCHES OF SCIENCE, 



THE LIBERAL AND FINE ARTS, 



AGRICULTURE, MANUFACTURES, 



AND 



COMMERCE. 



BY ALEXANDER TILLOCB, 



HONORARY MEMBER OF THE ROYAL IRISH ACADEMY, &C. &C. &C,' 



" Nee aranearum sane textus ideo melior quia ex se fila gignunt, nee nostef 

 vilior quia ex alienis libamus ut apes." Just. Lips. Monti. Folit. lib. i. cap. I, 



I 



LOND ON: 

 Printed for Alexander Tilloch, 



By R. Taylor, Black' Horse- Court, Fleet-street: 



And sold by Messrs. Richardson, Cornhill ; Cadell and Davies, Strand; 



Longman and Rees, Pater-noster Row; Debrett, Piccadilly j 



Murray, Fleet-street ; Symonds, Pater-noster Row ; 



Bell, Oxford- street ; Vernor and Hood, 



Poultry; Harding, St. James's-street j 



Bell and Bradfute, Edinburgh; 



Brash and Reid, Glasgow; 



and Gilbert and Hodges, 



Dublin, 



