JOURNAL 



OF 



NATURAL PHILOSOPHY 

 CHEMISTRY, 



AND 



THE ARTS, 



VOL. XIII. 



SlUustraten toitfj oBngraioingflf* 



BY WILLIAM NICHOLSON. 



LONDON: 



rxmt-EO SY w. stratford, crown court, te-mple bar, rtte, 



THE AUTHOR, 



■VND SOLD SV HIM AT NO, 10, SOHO-saUARE; 



AND BV 



H, i;>, SYMOXDS, PATERNOSTER-ROW. 



J me. 



