142 LEEUWENHOEK AND HIS “ LITTLE ANIMALS ”’ 
animalcules even yet alive, though in much less number 
than heretofore. 
On the 3rd of August, about 7 o’clock in the morning, I 
saw some few animalcules still alive; while the water was 
fermenting, as if it had been beer that stood and worked. 
In the afternoon, about 4 o’clock, examining it again, I 
still saw a few animalcules alive. In the evening, at 
about 9 o’clock, however, I saw very few animalcules 
living. 
On the 4th ditto, about 6 o’clock in the morning, I 
could discover no living animalcules, how attentively 
soever I looked; but I thought I saw some floating dead. 
The evening of the same day, about 9 o’clock, I discovered 
4 or 5 very little animalcules, and among them one some- 
what bigger, and very round. Such an animalcule I have 
never seen in well-water. 
The 5th ditto, in the morning, I saw again 4 or 5 very 
little animalcules, among them one that exceeded the 
others a bit in length: and amidst the very many par- 
ticles, I judged that I could distinguish little forms which 
agreed in their shape with the foresaid living animalcules, 
but I could discern no life in them. On the afternoon of 
the same day, about 3 o’clock, I saw several most extra- 
ordinarily small animalcules (nay, even smaller than 
those in the well-water), together with many animalcules 
that were somewhat bigger. These last * were well-nigh 
round, and their motion was mostly all a-rolling, where- 
withal they didn’t much hurry themselves. ‘Together 
with these was a sort” that were of the same size, but 
they were somewhat elliptical. And lastly, I also saw 
some® (though very few) which were a good 20 times 
bigger than the biggest sort spoken of above. These were 
1 Probably small flagellates (? Monas sp.). 
? Unidentifiable. Perhaps more elongated specimens of the same Monas. 
* Perhaps Euplotes or an allied hypotrichous ciliate. (The movements 
described indicate that it cannot have been a Cyclidiwm.) “ A good 20 times 
bigger’? means “ having about thrice the diameter” of the former sort. 
