LETTER 18. PEPPER-WATER 145 
On the 7th ditto, about 8 o’clock in the morning, the 
animalcules were as heretofore. The little eels or worms 
were a bit bigger, but the very smallest animalcules I 
could not now make out. Ditto, in the evening about 
8 o’clock, I now saw again the smallest animalcules of 
all, but few in number. The round animalcules very 
plentiful; and the animalcules which were twice as 
long as broad, together with the little eels, I saw in 
numbers unspeakably vast, for the amount of water. 
The 8th ditto, about 8 in the morning, the animalcules 
as before. The same day, afternoon and evening, the 
animalcules seen in no less number. 
The 9th ditto, in the morning, the animalcules as 
before. Ditto, in the afternoon, the animalcules in no 
less number, excepting that the round animalcules 
now seemed fewer to my eye. 
Having been, from the 10th to the 17th of this month, 
in Brabant and elsewhere for a holiday, I now observed 
that the water was very small in amount, and thick 
with all manner of very small particles; and I saw that 
the animalcules lay alongside one another in great plenty, 
without any motion, save 2 or 3 animalcules which I saw 
moving feebly. Thereupon I again added a little well- 
water to the pepper and the water that remained over: 
and I then viewed the water, but notwithstanding could 
perceive no further movement in it, after several 
observations. 
The 18th ditto, in the morning, examining this water 
again, I saw the animalcules alive and moving in as 
great numbers as ever heretofore, though their motion 
was not so quick; excepting only the little eels, none of 
which I could discern. Ditto, in the evening, the motion 
in the animalcules was as quick as ever before. 
The 19th ditto, the animalcules as before. 
The 20th ditto, the animalcules as before. 
The 21st ditto, the animalcules aforesaid, that were 
almost round, were in incredibly great plenty, and more 
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