38 SEMINAL VERMICULI, if, 
ennui of my reader, I fhall not detail them. 
There is one circumftance which ought not to be 
pafled in filence; that although thefe animalcula 
can fupport more cold than feminal vermiculi, 
their motion does become languid; and, on in- 
creafing it confiderably, they perifh like infeéts 
which yield to the greateft degree of cold. 
When I found thefe methods of conciliating 
Buffon’s experiments and my own, with. regard 
to the phenomena from cold, I attempted to find 
the fame refpeCting thofe exhibited by heat, but 
that was impoflible. My obfervations have been 
dire€tly oppofite to his. Thofe he made are com- 
prehended in a few words: ‘* The motion of 
‘¢ vermiculi ceafes when they are expofed toa 
“< fmall degree of heat.’’ I entreat the reader ta 
examine mine, that he may be enabled to com- 
pare and form an opinion. 
Two watch-glaffes were put on water contained 
in aveffel, one containing a portion of recent fe- 
men, full of vermiculi; the other, an equal quantity 
of femen, old and {warming with putredinous 
animalcula. ‘To know the fucceflive degrees of 
heat, I had put the ball of a thermometer inta 
each glafs. The water was gradually heated on 
a flow fire. As the thermometers rofe, I took 
fome drops of femen from the glafles for examin- 
ation with the microfcope. ‘The putredinous ani- 
malcula were very vivacious at 99°; at 104°, 
their 
