Of the Hair-like Infeffi. 239 
Motion upwards in the like Order has been 
defcribed already, N° IV. /. 
A fmall Quantity of this Matter having 
one Day been put into a jar of Water, it fo 
happened that one Part thereof went down 
immediately to the Bottom, whilft the other 
Part continued floating upon the Top. All 
Things remained a good while in this Con¬ 
dition, until at lafl each of thefe Swarms of 
Animalcules grew weary of its Situation, and 
had a Mind to change its Quarters. Both 
Armies, in Ihort, began their March at the 
fame Time againft the Side of the Jar; and 
as one proceeded upwards, and the other 
downwards, after fome Hours, they were 
near meeting about the Mid-Way; as the 
Fvoute each of them appeared to take, foon 
after they began to move, made it very eafy 
to forefee they would. The Deflre of know¬ 
ing in what Manner they would behave on 
this Gccaflon, engaged the Obferver to watch 
them with a careful Eye, and as they ap¬ 
proached frill nearer, he beheld, to his great 
Surprize, the Army that was marching up¬ 
wards, open to the Plight and Left, and leave 
a convenient Space for the Army that was 
marching downwards to pafs between its 
Wings. Thus without Confufion or Inter¬ 
mixture each held on its Way: the Army 
that was going upwards marching in two 
Columns to the Top, and the other pro¬ 
ceeding with great Regularity and Order in 
one 
