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l>cr of eggs which they contain. The fume is the cafe with refpecl 

 to the minute animalcules of which I am now fpeaking : for the 

 eggs of the fmaller animalcules were of the fame fize with thofe of 

 th.e larger ones, thougli the eggs of one were foiu' times more in 

 nmnber than thofe of the other. 



Thcfe lafl; animalcules 1 placed in a glafs filled wdth water, in 

 which Mere fvvimming fome other animalcules of the fame kind, 

 which were about {even or eiglit davs old ; at which time I judged 

 thefe animalcules to be four times the fize they were w hen tirll 

 excluded from the efrcr. 



On the 13th of July I had fomc few animalcules in a beer glafs 

 full of water, none of which had any eggs adhering to them ; but 

 the next morning I faw a nimiber of eggs, of a greenifli colour, on 

 the body of one of them ; w hereupon I took this animalcule from 

 the others, and put it into a glals tube, about the thicknefs of a 

 common goofe quill, with intent to difcovcr in what fpace of time 

 young animalcules would be produced from thcie eggs. 



In the morning of the lOth of July, I perceived fome animal- 

 cules which had ilfued from the eggs, and others Hill lying within 

 the eggs : but whereas thefe eggs had before been joined together 

 in very regular order, now, on the contrary, the entire eggs and 

 the fliells of thofe from which young ones had ilfued, lay difperfed 

 in a very irregular maimer. 



In the mean time I had, on the 15t]i of July, obferved another 

 animalcule, having the lo^er part of its body tilled with eggs, 

 though the day before I had not {een a tingle egg on it : this, 

 therefore^ I placed by itfelf in a glal's, and, on the 1 8th of July I 

 faw all the young animalcules come forth from the eggs, and fwim- 

 ming about in the water. 



From thefe obfen'ations I was certain, that all thefe animalcules 

 brought forth their eggs in the fpace of a day or a night, and 

 placed them on the hind parts of their bodies, in the exact and re- 



