I. • ANIMAI.CULA OF INPUSIONS. ^1, 



CHAP. IV. 



INFUSION ANIMALCULA AND THF.IR GERMS EXPOSED 

 TO VARIOUS DEGPvEES OF COLD. 



Animalcula were traiifpoited from the heat 

 of the atmofphere to the cold of an Ice-houfe. It 

 mufl have been a fevere change, in the heats of 

 Auguft, to be removed from 84° to 36°. The 

 only alteration I could perceive v/as fome relaxa- 

 tion of motion ; but they did not feem to fuffer 

 farther, though they remained there feveral days* 

 The experiment was diverfified by expofmg 

 them to the cold of freezing, which I did by 

 burving the veffels of infufions in ice. Confider- 

 able part of the animalcula died on the fourth 

 day : of twenty-two infufions, thofe of feven only 

 were alive. Thefe feven were kept buried in ice, 

 and vifited from time to time. In eleven days, 

 the animalcula of two had periflied, but thofe of 

 the other five were dill living at the end of two 

 months ; nay, one fpecies feemed m.ore numer- 

 ous. Befides the feven infufions already full of 

 animalcula, two, which were yet fterile, from 

 being lately made, had at the fame time been 

 put among the ice. In fome days, I know not 



D 3 how 



