i. SEMINAL VERMICULI. 39 
their motion began to grow languid; at. 106° 
and 108°, all perifhed. Seminal vermiculi are 
of a more -hardy conftitution : they were active 
at.111°; fome began.-to perifh at 120°; and at 
131°, there was not one alive:  fo-that the dit- 
ference which occafions the deftruction of the-one 
and the other is about 22 degrees. .The vermi- 
culi were thofe of human femen. .The fame ex- 
periments were made on the femen of. the horfe, 
the bull, and the dog. There was fome-. little 
difference: thofe of the horfe and dog perifhed 
-at 126°, thofe of the bull at 133°. 
- A number of capillary tubes were next filled 
with femen, partly full of feminal vermiculi, and 
partly of putredinous feminal animalcula. I fealed 
them hermetically, and put them at the bottom 
of a veflel of water, which was gradually warm- 
ed, A.thermometer was alfo immerfed. When 
the water had attained 99° of heat, “I ‘began ‘to 
examine the tubes one after another, as the 
heat increafed. The feminal vermiculi of man, 
and the other animals, died at 122° and 124°; 
and the. putredinous . anumaleula .at 106°-and 
108°, 
’ Thefe fa&s demonfirate, that- animalcula, ori- 
ginating in putrid femen, are of a contlitution 
better calculated to refift heat, which many other 
animals fupport,.and which. die only at the fame 
degree that -animalcula. from, putrid fubftances 
a 
C 4 ¢ die, 
J 
