C ] 
inward Preflurc in the Pliial being greater than the 
ambient Preflure in the Digefter, wherein were but 
Four-fifths of Water, the Cork was thereby forced 
outward j and that the fmall Difference between the 
proportionate Quantity of Water and Air in the Phial 
and in the Digefler, being only as Four-fifths to Five- 
fixths, was the Reafon not only why the Bottle was 
not broken, but alfo of the Faintnefs of the Ex- 
III. ^art of a Letter from John Green, M, Z). 
Secretary of the Gentlemens Society at 
Spalding in Lincolnflhire, to C. Mortimer, 
M, 2). Sec. R. S. ferving to ineJofe a Rela- 
tion of <1 Girl three Tears oldy who remained 
a garter of an Hour under Water without 
H E inclos’d is what I receiv’d this Day from 
a Gentleman who lives on the Spot, and what 
you in yours fo much defir’d. The Reafon of the 
Child’s being able to abide fo long under Water is 
pretty evident : The Child, moft likely, was infirm, 
weak, and fickly, from the Time of her Birth, fo 
that the Foramen Ovale was not grown up. I re- 
member about three Years ago to have feen aSubjedf, 
an old Woman 8o Years old, who had the Foramen 
Ovale fo large, that you might eafily thruft your mid- 
dle Finger through it j but fhe was attended with the 
SIR, 
Spalding, Feb. i8. 1737-8. 
above- 
