IV.. AND REVIVED: Ist 
ed by means_of the mixture I have often men. 
tioned. ‘The revival of the animals, after the ice 
melted, proved that they had fuffered no injury. 
I next fought for the refult of the experiment 
inverfed ; that is, what would happen on tranf- 
mitting wheel animals, from the degree of heat 
at which they were animated, to various degrees 
of cold always more intenfe. One morning, fome 
were taken in a watch-glafs to a north window, 
where the thermometer ftood at 25°, and I at- 
tentively obferved what pafled. When the water 
became fo cold that the hand could fcarcely be 
kept in it, the wheel animals interrupted the vor- 
tex and fell to the bottom, crawling languidly 
ever the fand. The water foon froze ; then they 
moved with difficulty, and foon ceafed. When 
more frozen, they contracted within themfelves, 
forming into globules which were clearly feen 
from the tranfparence of the ice. Thus they paf- 
fed the whole day and following night, which 
-was very cold. Next day, 1 removed them to a 
warm fituation, to fee whether thofe im the ice, 
under the figure of globules, would recover when. 
it melted. They did fo, even when remaining 
longer in the ice, and when the natural cold 
was increafed by means of fictitious to 11° un- 
der o. 
Reafoning from the experiments by cold ag 
from thofe by heat, it might be inferred, that 
K 4 revived 
