96 ANIMALS AND VEGETABLES fil. 
The greateft elevation occafioned by the death of 
three vipers, was an inch and three lines; and 
the leaft elevation, by the death of one viper, 
fix lines. The death of one fnake raifed the 
water four lines ; and of five fnakes, an inch and 
feven lines. 
The fame is the cafe with fmall lizards and 
- fifhes. The elevation of the water is in propor- 
tion to their numbers. 
I have repeated all thefe experiments in every 
feafon, and have uniformly feen the water with- 
in the receiver rife; with this fingle difference, 
that the elevation is more accelerated in warm 
than in cold weather, as well as the death of the 
animals fubjected to experiment. I have alfo 
conftantly obferved, that elevation is fo much 
the lefs as the animals are fmaller. Vipers, 
fnakes, and bats, raifed it more than frogs, newts, 
and lizards; and lizards raifed it more than 
leeches. This even takes place according to the 
difference of fize in the fame fpecies. The.death 
of a barbel, weighing a pound, raifed the water 
above an inch: that of one weighing only two 
ounces, did not raife it two lines. It feemed to. 
me, that, in confequence of this proportion, the 
death of the fmalleft animals fhould raife it very 
little, or hardly at all: which would happen if 
their death was not occafioned ‘by the diminithed 
elatticity 
