48 ANIMALS AND VEGETABLES © IIL 
three pounds and a half of water, the number is 
lefs; they multiply lefs, and die fooner. On di- 
minifhing the veffels, the larger animalcula are 
not feen, and neither large nor fmall, if the in~ 
ternal capacity does not exceed feven or eight 
inches. 
The nymphs of gnats feem to fupport this 
fituation better than infufion animalcula. In five 
inches of air, many changed to the winged ftate: 
As the quantity leffens, they perifh proportion« 
ally fooner, and without changing. | 
The eels of white vinegar are particularly re< 
markable. They live and multiply prodigioufly, 
where the volume of air does not exceed three 
inches ; and die in feveral days only, when cons 
fined in a tube where the vacuum is lefs than an 
inch. I fpeak of white vinegar, for the effects 
are very different with red. In my experiments, 
the eels of the latter did not live five days in a 
veffel where the vacuum was eleven inches. This 
did not happen fo much becaufe the vinegar uns 
derwent an alteration, as that the eels of red vi- 
negar rather are of a different nature from thofe 
of white ; which I believe to be more ptobable, 
from the difference of figure 1 remarked in each 
{pecies. 
Tadpoles perifhed in fome days in nine inches 
of air; and in a few hours, if sa vacuum was 
but three inches. 
Caterpillasis 
