LETTER 18. PEPPER-WATER 139 
On the 6th ditto, the animalcules were as before. 
On the 8th ditto, the little oval animals* were 
multiplied, swimming among the foresaid very numerous 
little animalcules*; and now they’ were very nearly all 
of one and the same bigness. 
The 9th of June, the oval animalcules were in yet 
ereater number, but the very little animalcules were now 
less. And now, using again a particular method in 
observing, I saw the little feet or legs* (wherewith the 
animalcules were provided underneath their body, which 
was flat) moving very plainly ; and with such a swiftness, 
that ’tis incredible. And methinks that ever and anon I 
could make out that each of the globules, whereof, as I 
have said, their body was for the most part composed, 
was not perfectly round, but every one of them stuck out 
in a point, in the same fashion as the shields or plates 
on the sturgeon or thornback do.’ The said animalcules 
were, to my eye, 8 times smaller than the eye of a louse.” 
On the 10th ditto I took a little of the last-mentioned 
water, and mixed it with a little water wherein 36 cloves 
had now lain for about 3 weeks; and I perceived that, 
no sooner did the multifarious little animals aforesaid 
come into this mixed water, than they were dead. 
On the 12th ditto, the said animalcules seen in no less 
number; and as the water was now so evaporated away 
and sucked up by the pepper, that the pepper itself began 
* Colpidium. 
* Bacteria. 
*¢.e., the colpidia. L. cannot have meant that the ciliates and bacteria 
were now equal in size. 
‘ i.e., the cilia (on the Colpidium). 
° ie., like the “ placoid scales ” of some Ganoid and Elasmobranch fishes, 
such as the sturgeon (Acipenser) and the thornback (Raja clavata). 
® This estimate accords with that given for the “ oval animalcules ’’ under 
date June 1 (2nd observation).—Oldenburg’s translation in the Phil. Trans. 
terminates at this point. All that follows has never previously appeared in 
print. 
