PHILOSOPHICAL 
TRANSACTIONS, 
GIVING SOME 
ACCOUNT 
/ 
O F T H E 
Prefent Undertakings, Studies, and Labours, 
OF THE 
INGENIOUS. 
IN MANY 
Coniiderable Parts of the WORLD. 
VOL. XLVII. For the Years 175-1 and 175-2. 
LONDON: 
Printed for C. Davis, Printer to the Ko yal 
Society, ovcr-againft Gray’s- Inn-Gate in Holbcurn. 
M.dcc.liii. 
