( « 6 3 ) 
that thofe Motions ferv’d Tome other purpofes than on- 
ly to draw their Food to era. 
I have formerly refle&ed, what could be the ufe of 
thefe indented Wheel-works, which are fo like the in- 
dented Wheels of a Clock, or Watch j bat when l con- 
sider farther of the Matter, I muft own that they are 
very neceflary to produce a great Motion in the Watery 
for if it were a round and a fmooth Wheel, fuch a one 
wou’d caufe but a very fmali Motion ^ whereas now 
each Tooth in the faid Wheel or Circle produces a great 
Motion, in companion of what a fmooth and plain 
Wheel wou’ddo. From whence appears the myfterious 
and unconceivable Order in the formation of fuch fmill 
Creatures, which are not to be perceiv’d by the naked 
Eye. 
In the beginning of Augufi I was in a Garden that 
had a Pond full of Fifh, upon the Water of which l 
obferv’d a thin Scum floating that was of a greenifh 
Colour, tho’ there was nothing Green in the Watery 
which feem’d ftrange to me, becaufe at other times I 
had obferv’d that the Water of the faid Fi(h-Pond was 
very clear, and fo was that which fed it$ and they told 
me moreover, that when it rain’d the faid Scum dif- 
appear’d. 
I took then a little piece of a Wooden Lath, and 
drawing it over the Superficies of the Water, I plac’d 
a fmali Drop of the Water upon a Green Wine Glafs, 
and then view’d the fame wi:h the Mifcrofcope, and 
difcover’d an inexpreffible Number of Animalcula , fo ex- 
ceeding fmali, that they almoft efcap’d my fight thro’ 
the Microfcope 5 infomuch, that no Body wou’d fcarce 
believe it but thole that have fc-en it : There were alio 
feveral forts of bigger Animalcitla , mixt wi h a great 
Number of little Air Bubbles of an exceeding finallnefs. 
A few Days after l defir’d ’em to bring me a little of 
the fame Water, that I might examine it more nicely ^ 
Y a but 
