JOURNAL . 



OF 



NATURAL PHILOSOPHY, 

 CHEMISTRY, 



AND 



THE ARTS. 



• VOL. XXIX. 



3ltlusttateD initfj (iBngraiaingiS. 



BY WILLIAM NICHOLSON. 



LONDON: 



FnnrrEO BY \v. stratford, crowh coimr. templs ulri for 



W. NICHOLSON, 



No. IS, BLOOMSBURY SQUARE; 



AND SOLD BY 



J. STRATFORD, No. 112, Holboun Hill. 



181L 



