PHILOSOPHICAL 
TRANSACTIONS, 
GIVING SOME 
ACCOUNT 
OF THE 
Prefent Undertakings, Studies, and Labours^ 
OF THE 
INGENIOUS, 
IN MANY 
Confiderable Parts of the WORLD. 
VOL. LIX. For the Year 1769. 
LONDON: 
Printed for LOCKYER DAVIS, 
Printer to the Royal Society, 
near Graf s-Inn Gate^ in Holbourn, 
M.DCC.LXX. 
