JOURNAL 



«F 



NATURAL PHILOSOPHY, 

 CHEMISTRT, 



AND 



THE ARTS. 



VOL. XX. 



ailugtrateu toitlj CnstatJingis. 



BY WILLIAM NICHOLS-ON. 



LONDON: 



?RUVTED BY W. STRATFORD, CROWN COURT, TEMPLE BAR i FOR 



W. NICHOLSON, 



CHARLOTTE STREET, BLOOMSBURY. 



AND SOJ,n BY 



1808. 



