• - ( 49 4 ) 
grew for the fpace of fix Days; afrer which they laid 
themfelves up in their Bags. Thus they remain’d for 
two Days more without Motion, and then came forth in 
the Shape of Flies. (Fig. 5.) The Water at that time 
was all gone, and there remain’d no more of the Fruit 
than the Seeds, the Veflels which compofed theTunicks 
of the Ovarys, the outward Rind, and the Excrement 
of the Maggots; all which together weigh’d about an 
Ounce. So that there was loft of the firft weight of 
the Fruit when it was cut, above twenty Ounces. 
We may Judge from this, and other Cafes of the Hke 
nature, how much Vegetable Life is dependent on Fer- 
mentation, and Animal Life on Putrifadtion. 
VII. The Art of Living under Water : Or, a Vi ) - 
courfe concerning the Means of furnifhing Air 
at the Bottom of the Sea, in any ordinary Vepths. 
By Edm. Halley, LL. D. Secretary to the 
Royal Society. 
T Here have been many Methods propofed, and En- 
gines contrived, for enabling Men to abide a com- 
petent while under Water: And the Refpiring frefh Air 
being found to be abfolutely neceftary to maintain Life 
in all that breath, feveral ways have been thought of, 
for carrying this Pabulum Viu down to the Diver , who 
muft, without being fomehow fupplied therewith, return 
very foon,' or perifti. 
We have heard of the Divers for Spunges in the 
Archipelago , helping themfelves by carrying down Spunges 
dipt in Oyl in their Mouths : but confidering how Email 
a Quantity of Air can be fuppofed to be contained in 
% v. the 
