Of the Louse. i8i 
Preffure or otherwife y fince, if roughly 
handled, they may be feen to thruft out 
their Stings 5 and as he felt little Pain or 
Uneafmefs in the Sucker, or Piercer, though 
feven or eight were feeding on his Hand at 
once. The Females lay Eggs or Nits, whence 
young Lice come forth, perfect in all their 
Members, and undergo no farther Change 
but an Increafe of Siz;e. 
Mr. Leeuwenhoek, being defirous to 
learn the Proportion and Time of their In¬ 
creafe, put two *■ Females into a black Stock¬ 
ing, which he wore both Night and Day y 
and found that in fix Days one of them had 
laid fifty Eggs, and upon diiTedting it, faw as 
many more in the, Ovary; whence he con¬ 
cludes, that in twelve Days it would have 
laid an hundred Eggs. Thefe Eggs hatch¬ 
ing in fix Days (which he found to be their 
natural Time) would probably produce fifty 
Males and as many Females: and thefe Fe¬ 
males coming to full Growth in eighteen 
Days, might each of them be fuppofed, af¬ 
ter twelve Days more, to lay alfo an hundred 
Eggs y which Eggs in fix Days farther (the 
Time required to hatch them) might pro¬ 
duce a younger Brood of five thouland -f*. 
So that in eight Weeks a Loufe may fee 
five thouland of its own Defendants y an 
* Arcan. Nat, Tom. I. p..78. 
f Ibid, 
Increafe 
