PHILOSOPHICAL 
TRANSACTIONS, 
GIVING SOME 
ACCOUNT 
OF THE 
a % ' r - * 
Prefent Undertakings, Studies, and Labours, 
* ■ • * - ^ r *. . . 
OF THE 
INGENIOUS, 
IN MANY 
♦ 4 * * , m „ 
Coniiderable Parts of the WORLD. 
* • * 
— : 
VOL. LXIL 
H ^ «• . *• \ f » . / 
LONDON 7 
Printed for LOCKYER DAVIS, in Holbourn , 
Printer to the Royal Society. 
M.DCC.LXXIi. 
’• ^ "■* ' - • a* *• 
