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II. Microfcopical Oh/eryations o?i the 'B.lood VeJJels and 
Membranes of the InteJHnes. In a Letter to the 
Royal Society from Mr. Anthony Leeii-~ 
wenhoek, F. jR* S,. 
Delft iti Holland^ A^ril 20. 170^. 
J Take the Liberty to acquaint your Honours, that 
Profeflbr Bidloa came to my Houle March 7. deliring: 
me that he might view thro’ a Microfcope a little piece 
of Gut, which, he faid, was part of the Bowels of a 
Woman 5 whereupon I- having feparated a fmall Particle 
thereof from the reft, we difeovered in' one of the thine 
Membranes, of which, for the moft part, the Gut is 
compofed, a great number of little Fibres and Veflels, 
which lay in great Multitudes over and acrofs each other, 
as alfo fome Particles of Fat, which lay like Bunches of. 
Grapes upon the faid Fibres^ 
After that the faid ProfefTor Bidloo was gone, F was 
deftred, that in cafe I had difeovered any thing remarka- 
ble in that little piece of Gut, I would give a brief Ac- 
count of it. 
Whereupon the fame Evening .1 writ to the Perfens 
who defired that of me, that t was conftdering whithtr * 
or no thofe Particles of Fat,, which we had difeovered, 
might not be fuppofed by many People to be Glands or ' 
Kernels, and that the fame were to be found likewife in 
the Skin y and the rather^ becaufe that I have difeovered 
in the Skin and Guts of Animals none of thefe Glands, 
of which People talk fo much, but. Particles of Fat im 
great number. 
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