Numb. 480. 
PHILOSOPHICAL 
TRANSACTIONS, 
GIVING SOME 
ACCOUNT 
O F T H E 
Prefent Undertakings, Studies, and Labours, 
OF THE 
INGENIOUS. 
IN MANY 
Confiderable Parts of the WORLD. 
LONDON: 
Printed for C. Davis, over-againft Grafs- Inn-Gate 
in Holbourn 5 Printer to the R o y a l Society. 
M. D C C. XL V I I. 
