A i(0- J^ 



JOURNAL 



OF 



NATURAL PHILOSOPHY, 

 CHEMISTRY, 



AND 



THE ARTS, 



VOL. VIIL 



31HugtratetJ toit{j aBngtatiingsf* 



BY WILLIAM NICHOLSON. 



LONDON : 



PRINTED BY W.STRATFORD, CROWN-COURT, TEMPLE-BAK, FOR 



THE AUTHOR, No. 10, SOHO-SQUARE; 



AND SOLD BY 

 ALL THE BOOKSELLERS IN THE UNITED KINGDOM. 



180i. 



