138 LEEUWENHOEK AND HIS ‘‘ LITTLE ANIMALS ”’ 
I observed that when I added rather much of the water 
containing the pounded pepper, it came to pass that the 
foresaid animalcules died forthwith; but when I added 
somewhat less of the same water, then the little creatures 
remained alive. 
On June 2nd, in the forenoon, after I had made divers 
observations since the 26th ultimo, but without being 
able to discover any living creatures, I now saw a few 
particles which had, indeed, the figure of some of the 
little animals, although I could distinguish no life in 
them, how attentively soever I looked. On the 2nd 
again, at night, about 11 o’clock, I discovered a few very 
little living animalcules. 
The 3rd ditto, I discovered therein many more 
animalcules, which were all very small, and about 2 or 8 
times as long as broad.’ All through this water little 
bubbles kept rising, as if ’twere fresh beer that stood 
fermenting. 
The 4th ditto, in the morning, I found therein a great 
many animalcules. The same day, in the afternoon, 
examining the water again, I saw such a great many 
living creatures in one drop of it, that they amounted 
to at least 8 or 10 thousand; and to my eye they were, 
when viewed through my microscope, like ordinary 
sand-grains to the naked eye. 
On the 5th ditto, I discovered, besides the multifarious 
very little animalcules aforesaid, some few (but not above 
8 or 10 in one drop of water) little oval animals,” whereof 
some exceeded the others quite 8 times in bigness,’ whilst 
the biggest of them were in shape like the oval 
animalcules that I have made mention of before (those 
that were in the water wherein the whole pepper lay).* 
* s00 lang als breet MS. “as broad as long” Phil. Trans.—an obvious 
mistake.—The organisms were evidently bacilli. 
* Probably Colpidium again. 
* 1.e., were twice as long. 
* i.e., they resembled the organisms previously identified as Colpidiwm. 
