II. A Letter from Mr. Ant. Van Leeuwen- 
hoek, F. S. containing his Obferyati^ 
ons upon the Hair mentioned in the foregoing 
Letter^ 3cc. 
Delft, Nov. 22. 1707. 
Honourable Gentlemen^ 
I N your Letter of the 24th of O&ober laft there was 
inclofed a fmall Lump of a hairy Subftance, which 
was difcfaarg’d by a Woman about 50 Years old or up- 
wards, after (he had taken a Dofe of Spanifi Flies given 
her for an Ulcer in the Kidneys. 
I viewed part of the hairy Subftance thro’ a Micro- 
fcope, and judged it to be the Hair or white Wooll of a 
a Sheep 3 which Wooll was broken into fuch fmall or 
fhort Particles, that fome of ’em were no longer chan 
fix Diameters of the breadth of a Hair^ which 1 fuppofe 
could not- proceed from the Body of a Man, but that it 
was rather found in the heel of ones Stocking. And the 
oftner I repeated my Obfervations, the more I was con- 
firm’d in my Opinion 5 for I could not only difcover the 
fhort broken woolly Particles, but Ifaw alfoagreat num- 
ber of the Ends grinded to pieces, as it were 5 inforauch 
that not only the Bark fif I may fo call it) or outfide of 
the woolly Particles were rubb’d off, but the inward lit- 
tle Hairs, of which the Wooll is compofed, were fo di- 
vided from one another, that they appeared .with their 
ends like little Bruihes. 
More- 
