in Semine Mafculino. 1 59 
as if in Purfuit of Prey, with greater Velo¬ 
city ; though (being viewed in a capillary 
Tube) their whole Courfe was no longer 
than the Diameter of a Hair. 
If you would view the Animalcules in the 
Milt or foft Row of Filhes, fqueeze out a 
little of it, and putting the Quantity of a 
Pin’s Head upon a tingle Itinglafs, dilute it 
with Rain or River Water, till the little Crea¬ 
tures have futiicient Room to fwim about 
freely, and fhew themfelv.es to Advantage; 
which tfiey can by no means do mllefs it 
be made very thin. Or, after you have 
mixed fome Water with it, apply it to the 
Micro/cope in one of your fmallefl capillary 
Tubes; which Way Mr. Leeuwenhoek 
informs us he found the oioft ufeful for the 
Examination of the Semen of different Crea¬ 
tures. [N. B. * The Eggs in the Row, and 
Animalcules in the Milt, of Fillies of one 
Year old, are as large as in thole: of the fame 
Species of twenty Years old.] 
Upon opening the Seminal Vejfels of a 
Cock, fqueezing out a frnall Drop of the Se¬ 
men, and viewing it with a Microfcope , Le¬ 
gions of Animalcules appeared therein, Swim¬ 
ming in Crowds together, and crofting one 
* 4 rc . Nat, Tom. III. p. 188. 
M3 
another 
