es I viewed feveral times, in order to fee, if it were polH- 
ble, whether they were living Creatures, or whether there 
wereany thereabouts^ but with all my circurafpeftioi I 
could difcover nothing till the aSch of the faid Month of 
OQokry at which time I did perceive five and twenty Ani- 
mdcnla proceeding from the laft mentioned Particles, and 
fwimming or running about the fides of the Glafs ^ and 
then I did alfoobferve two forts of thefe AnimalcuU^ and 
xhe fmalleft fort appeared to me, fometimes (hining and 
fometiraes not, which appearance I did imagin might pro- 
ceed from the light reflededfrcrathc fmoothback ot thofe 
Creatures, and this laft fort had quite a different motion 
in Swimming, from thofe other which were a little big' 
ger^'inthe remaining Particles that ftuck to the fides of the. 
Tube I could perceive no alteration. 
• I farther obferved the faid Water feveral days follow- 
ing, and was amazed to lee the fmalleft fort of thefe Am- 
mdcula in fuch mighty numbers where-ever I caft my Eye, 
either fwimming or running about the fides of the Tube ^ 
and whereas I held the Glafs Tube full of Water in my 
hand, and confequently put the Water in a gentle kind of 
motion, I could perceive that the Stream (A I may fo call 
it^ would often be too ftrong for thefe Animdcula^ and 
carry them along with it ^ and the chiefeft difference I 
could find between thefe Animdcula and the inanimate 
Particles, which I told you I obferved in the Water alfo, 
and which were very like the other, was, that the former 
made fmall angles in their fwimming, whereas the latter 
always moved in a right Line. 
I have alfo obferved, that when I put Water into a 
Glafs Tube that had never been wet, abundance of Air- . 
bubbles appeared, which ftaid on the Glafs a little while 
and then vaniftit- 
That I might be better fatisfied in this matter^ on the 
6th of November I took a new Glafs Tube, and tho I had 
moft carefully fhut it up and cover d it clofe, I could fee 
abundance of fmall Particles in it. On 
