t* ANIMALCULA OF INFUSIONS. 55 



This was not enough. I was eager to fee what 

 happened as the water gradually froze. — A large 

 drop of infufion being prepared, it was adjufted 

 to the microfcope. The circumference, that is, 

 the thinned part, froze firll. The animalcula 

 retreated from the edge to the interior of the 

 fluid. As the freezing advanced, they fllU re- 

 ceded, until collefted in a mafs in the middle of 

 the drop, where it was yet fluid. When this 

 alfo froze, the hfe and motion of the animalcula 

 ceaied. 



On repeating the experiment, they again fled 

 to the centre, and died there as the drop hardened 

 into ice. Two other glaifes being filled with fi- 

 milar infufions, they took an hour to freeze ; and 

 this infinite army of animalcula had fo concen- 

 D 4 trated 



fome fpecies that have furvlved the congelation of infu- 

 fions ; — a fad which it has not been my fortune to witnefs : 

 and I mufl fuppofe, he convinced himfelf tiie infufions 

 were perfedtly frozen. Quaedam (/. e. Animalia Infuforia) 

 rigorem frigoris fuftinent aquaque gelu foluta, eodem nu- 

 mero, vigoreque priftino circumnatant, alia gelu afFe»5la 

 periere. Thus does he exprefs himfelf, in his freatife on 

 Infufion Animalcula, Leipfic, 1773, 1774. 1 regret that 

 this work did not come to my knowledge until too late 

 to ufe it in the te;;t of my manufcrlpt, which was al- 

 ready tranfcribed. The iofs can only be repaired by 

 notes ; particularly as the author ar^d myfelf have fre- 

 quently remarked the fame fa.6ts, ox difcu/Fed analogous 

 problems. 



