4 ANiMALCULA OF INFUSIONS. I, 



Vegetable feeds, being the mofl: fit for produc- 

 ing animalcula, v/ere preferred to other fubftan- 

 ces, and thofe that never failed to produce them 

 though they had experienced the influence of 

 heat. White kidney beans, vetches, buck-wheat, 

 barley, maize, the feeds of mallovi^s and beets 

 were infufed ; and, that the experiment might be 

 the more accurate, I endeavoured as much as 

 pofTible to take each fpecies of feed from the 

 fame plant. As the yolk of an egg in macera- 

 tion abounds with animalcula, one was alfo infuf- 

 ed, 



Expsriment has demonftrated, that the heat of 

 boiling: water is not always the fame, but great, 

 er, if the atmofphere is heavier ; and lefs, n 

 lio-hter : therefore, water will acquire more heat 

 at one time than another, which will be propor^ 

 tioned to the ftate of the atmofphere. In this, 

 and my other experiments, the feven different 

 kinds of feeds, and the yolk, were all boiled an 

 equal -time, that they might acquire the fame de- 

 CTree of heat. Here the experiment was diverfi- 

 fied, by boiling a certain quantity of each infufiou 

 half an hour ; another quantity, an hour ; a third, 

 an hour and a half ; and a fourth, two hours. 

 Thus, four clalTes of infufion, and the egg, could 

 be formed. The fame water, in which the feeds 

 had boiled,' was taken for the infufions, and 

 what bad boiled half an hour alone taken for 



the 



