Of the Semen Mafculinum. 103 
more than an hundred animalcula in the one thirtieth part 
of water, equalling the bignefs of a millet feed. Whence 
it appears, that if one thoufand are to be feen in the one 
thirtieth part of a millet feed, there may be feen thirty 
thoufand in one fuch whole feed; and confequently in a 
drop of water ninety-one times bigger, there may be feen 
25730,000. Befides he compared the water to the bulk 
of a grain of fand; that if the axis of a grain of fand be 
one, that of a drop of w&ter is at leaft ten, confequently a 
drop one thoufand times bigger than that grain of fand, and 
therefore there are 1,000,000 of animalcula in one drop 
of water, at the rate of one thoufand little animals in that 
quantity of water. 
8 In the fame manner he alfo computed that 4,096,000 
eggs were in the roe of a crab. Each of which received 
its nourifhment by a firing from the crab’s body. 
To view the animalcules in the milt or foft roes of 
fifhes, fqueeze out a little of it, and putting the quantity 
of a pin’s head upon a glafs, dilute it with river or 
rain-water, till they have fufficient room to fwim freely 
about, and fhew themfelves to advantage. 
N. B. the eggs b in the roe and animalcules in the 
milt of fifhes of one year old, are as large as in thofe of 
the fame fpecies of twenty years old. 
Some of the feminal matter taken from the tefticles of 
a dog c , abounded with animalcules in form of fig. 170. 
and feme of them remained alive after having been kept 
feven d days in a glafs tube. 
The teftreies of a hare, although four days e dead, 
were found to be exceeding full of animalcules, like 
H 4 thofe 
a Arc. Nat. Tom. i. Part ii. p. 339 ' b Ibid. Tom. iii. 
p xtiS. c Ibid. Tom. i. Part. ii. p. 160. Ibid, p.150, 
and 49. e Ibid. Tom. i. Part ii. p, 160. 
