Animalcules in Waters . 95 
rowly, It was difcovered to be a young one 
in the Birth ; for though it had but four very 
fmall Horns when firft feen, after fixteen 
Hours its Horns and Body were grown much 
larger; and in four Hours more it was quite 
excluded its Mother s Body. Agai'nft this, 
on the upper Side, appeared a little round 
Knob, which gradually increafed in Bignefs, 
and in a few Hours became pointed at (b). 
Thirteen or fourteen Hours after, it was 
grown much larger, and alfo had two Horns. 
In twenty-four Hours four Horns were feen 
upon it, one whereof was fmall, the fecond 
larger, and the other two very large, ex¬ 
tending and contracting more vigorously than 
their Fellows. Three Hours .afterwards this 
Animalcule likewife fell off from its Mother* 
and fhifted for itfelf. 
The above Account Is the Subfiance of 
Mr. Leeuwenhoek’s Letter to the Royal 
Society , Phil. Pranjx\ Numb. 283.—And in 
Numb. 288. we meet with a farther De- 
fcription of the fame Animalcule by an Png- 
life Gentleman, whom Mr. Leeuwen¬ 
hoek’s Relation had put upon hunting after 
it. He fays, he difcovered one of them in 
fome clear Water taken out of a Ditch, but 
with the utmofl Attention could find no more 
therein-. It appeared the fir ft Day as in Fig. 
IV. but he tells us it varied every Moment, 
and the Knob {a) } which looks like the 
Vo l* L H Gut 
