PHILOSOPHICAL 
TRANSACTIONS: 
Giving fome 
ACCOUNT 
O F T H E 
Trefent Vnderta^ngs, Studies and Labours 
o F T H E 
INGENIOUS, 
In many 
Coniiderabie Parts of the World. 
VOL. XX. For the Year i6p8. 
L 0 N D 0 N: 
Printed for S. Smith and B. Walfird, Printers to the 
Royal Society, at the Prince's Arms in St. Paul's 
Church-yard. MDCXCIX. 
