JOURNAL 



OF 



NATURAL PHILOSOPHY, 

 CHEMISTRY, 



AND 



THE ARTS, 



VOL. VIL 



SllluSttateB toit{) (JEngtatJingsf* 



BY WILLIAM NICHOLSON. 



■ *" ' ■ ■ ■ I .11.-1 ■ » ' ' '■- 



LONDON: 



PRINTED BV \\\ STRATFORD, CROWN^OURT, TEMPLE-BAR, FOR 



THE A'XJTHOR, No. 10, SOHO-SQUARE; 



AND SOLD BY 

 G. AND J. ROBINSONS, PArERNOSTER-ROW. 



180*, 



