( *<*1 ) 
others were driven away* The Animatculum made ufe 
of fome of thefe Particles, that were thus drawn to it 
by its circulating Inftrument, for Food and Nourifhment 5 
and other Particles being almoft qome to it, were with 
great Nimblenefs driven away \ and, as it were, reje&ed 
by the Animalculum : From whence I infer’d, that thofe 
Particles which were thus thruft away, were not proper 
for its Food. 
From this Difcovery we may conclude, that fince this 
kind of Animalculum cannot move from place to place 
in the Water, nor confequently feek its Food as other 
Creatures do, (that are endued with Motion) being 
fatten’d by the Tail or other Parts of the Body, it mutt 
necefiarily be provided with fuch Inftruments as are fit 
to move the Water, and by that means come at the 
Particles floating in it, which ferve for the Nourifh- 
ment, increafe and defence of its Body. 
If we obferve thofe AnimalcuU , which, with their long 
Tails, are fatten’d to fome part or other of the Weed, 
as we have difcovered a great many on the little Roots 
of the Duck -Weed $ we may obferve, that they do not 
only make a Circular Motion with the extream part of 
their Bodies, which Motion, in proportion to the faid 
part, is very great 5 but they can likewife draw in their 
Tail, and that with a very quick Motion ^ by which 
means they can move the Water out of its place, when 
they ftretch their Tails out again, and fo bringing frefli 
Water under them, they procure new Food. 
I likewife obferv’d a very few Animalcule whofe Bo- 
dies were fhort and thick, and which were much bigger 
than thofe other Animalcula that hous’d themfelves in 
a Sheath, and were fatten’d by their Tail, or extream 
Parts, to the little Roots of the Duck-Weed : And altho’ 
thefe fhort and thick Animalcula could move from place 
to place, yet they alfo had a Circular Motion in the 
fore part of their Bodies. From whence 1 concluded, 
• • that 
