JOURNAL 



. OF 



NATURAL 'PHILOSOPHY, 

 CHEMISTRT, 



AND 



THE ARTS. 



VOL. XXJ. 



auufittateti toitf) OBnsratJingiGf. 



BY WILLIAM NICHOLSON. 



LONDON: 



7RIINTED BV W. STRATFORD, CROWN COURT, TEMPLE BAR ; FOR 



W. NICHOLSON, 



CHARLOTTE STREET, BLOOMSBURYj 



AND SOI-D BY 



J. STRATFORD, No. 1 12, Holborn Hill. 

 1808. 



