( icoi ) Numb. 150. 
PHILOSOPHICAL 
TRANSACTIONS. 
Auguft 16. 1669. 
The Contents. 
Jf$ Invention for E/limating the Weight Water in Water 
with ordinary Ballances and Weights. Jin BxtraifefaLet' 
ter , containing an Accomp of a faff age iy fea to the Eift- Indies, 
Seme Confederations ahut Slate, obfervations concerning the 
eddXmnof fome Shell- fnailes 5 and the Darting of Spiders, 
An accomft of fome Books X GEO KG. S INC LA Rl 
ARS NOVA itUAGNA GRAFITATIS ef lE- 
riTATlS. II OBSEKFATIONES M E D I-, 
C iy£ , € Mufae THOMt/E B A RTHp LI'KI. III. 
OTTON. r A CHEN II H TP Po CRATES 
CHTMICUS^ IV. TH. B A RT H O L I N I Differ- 
tatiode CTG Nl A N ATOM E^ mncau0ak CASP, 
B ARTHOLINO J. V. t/EGI'DII STRAUCH II 
BREVIARIUM C H R 0 N O L O G ICU M. VL 
ABREGE C HRONOLOGI SUE de L^HlSToh 
RE SACREJR et PROFANE, park F. LAB- 
BE. 
An Invention 
For Eftimating the Weight of Water ia Water with ordinary 
BaUances and Weights. 
THe Author of this laveation is the Noble Robert Bojle % 
who was pleas'd to comply with our defires of communi- 
cating it in Engliihco the Carious in England as by iafe- ting 
the fame in the Latin Tranflatioa of his HyJro/^atical Para^^^&x-s 
A aaaa ie 
