Of Rain-Water, &c. 83 
the Water is dried almofl away, and they 
are near expiring, their Mouths may be feen 
opening to a confiderable Width. 
CHAP. Y. 
Of Rain-Water and other Waters. 
M R. Leeuwenhoek fays, that at firft 
he could difcern no living Creatures 
in Rain-Water; but, after flanding fome 
Days, he difcovered innumerable Animalcules 
many tboufand of Times lefs than a Grain of: 
Sand, and in Proportion to a Mite as a Bee 
is to a Horfe. 
In other Rain-Water, which had likewife 
flood fome Time, he found the fmallefl Sort 
he had ever feen ; and in a few Days more; 
met with others eight Times as big as thefe, 
and almofl round. 
In another Quantity of Rain-Water, that 
had been expofed like the former, he difco¬ 
vered a Kind of Animalcules with two little 
Horns, in continual Motion. The Space be¬ 
tween the Horns was flat, tho’ the Body was 
roundifh, but tapering a little towards the 
End, where a Tail appeared four Times as 
long as the Body, and the Thicknefs of a 
Spider’s Web. He obferved feveral Hun¬ 
dreds of thefe within the Space a Grain of 
Sand would occupy. If they happened on 
G 3 the 
