[ 426 ] 
and efteemcd fome of the molt accurate that are 
extant. 
The honourable Robert Boyle , at the end of his 
Medicina hydroftatica , fftft pubiifhed at London in 
l 6 9 °> 8 °- fubjoined a tabic of the fpecihc gravi- 
ties of feveral bodies, accurately taken from his 
own hydroftatical experiments. Belides which, 
there are alfo in the fame tracf, and in other 
parts of Ins works, feveral experiments of this 
excellent author’s, which he has given occafionally, 
together with the ufes refulting from them. To 
fuch of thefe in the following collection, as were 
taken from the table juft mentioned, I have barely 
annexed his name, but to fuch of the others as oc- 
curred, I have alfo added the volume, page, and co- 
lumn, of the la to, folio edition of his works in 1744, 
where the fame are to be found. It may be noted, 
that in the firft edition of the Medicina hy dr oft a- 
tic a, there were feveral errors of the prefs. Such 
ot them as I could difeover by calculation, I have 
corrected in the following pages. 
There is a table pubiifhed under the name of 
7 - C 4 in the 199 th number of the Thilojophical 
Tran) actions, A°. 1693 • an d this is evidently a 
fupplement to that above-mentioned of the Thilo- 
fdphical Society meeting at Oxford. The experi- 
ments were, according to the initials J. C. made by 
the fame curious perfon Mr. John CaJ'well , and are 
therefore of the fame eftimation as the others. 
•» 
Mo Homberg , of the Royal Academy of Sciences at 
Tar is, read a memoir in 1699, wherein he took no 
tice 
