282 Mifcellaneoits Difcoveries . 
each of thefe Forms, which are only difter- 
ent Coverings or DrefTes for it. 
19. The Tail of the Male Silk-worm be¬ 
ing Squeezed, Animalcules were found in the 
Semen* four Times as long as broad ; their 
Backs thicker than their Bellies, like the 
Shape of a Trout. Their Length was fup- 
pofed to be about half the Diameter of a 
Hair. This I experienced myfelf, on the 
8th Day of Augufi , in the Year 1742, when 
taking a Male Silk-worm, that was juft then 
come forth in its Moth-jiate , and giving its 
Tail feveral little gentle Squeezes, in about 
a Minute’s Time a fmall Drop of a brownifh 
white Liquor was fquirted brifkly from it on 
a Talc I held to receive it: and diluting this 
with a little Water warmed in my Mouth 
for that Purpofe, I was very much furprized 
and pleafed to obferve the numberlefs Ani¬ 
malcules it contained, fwimming about, alive 
and vigorous.- 
N. B. Whoever would make this Experi¬ 
ment, muft do it before the Moth has been 
coupled with the Females j for nothing is to 
be got from it afterwards, as I have found 
by feveral Trials, 
20. The Probofcis of a Butterfly , which 
winds round in a fpiralForm, like the Spring 
of 
* Vide Leeuwen. Arc, Nat . Tom. 1 .. Par. II. p. 422. 
