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part of mr. Leeuwenhoeks Letter. To witt concerning the constituent
parts of Blood and milk. these by making vse of a small peice of
Looking glasse plate (instead of the vsuall foot of the microscope) which
was very smooth & cleer and spreading a little of the Blood and .
milk in the top of it were plainly . . . and looking against the flame
of a Candle were very plainly to be seen.

To wit First that the Blood consisted of two substances the one
a conteining liquor . . . vndetermined . . . and indistin
guishable as to its parts flowing about and in compassing the other -
which consisted of an infinite number of exceeding small parts which -
were plainely perceiud to be globular, all wch. parts were very equal
as to bigness and were seen vpon the turning of the microscope to moue
to & fro very . . . swiftly and very freely. they seeming to crosse one ano
ther very much and to moue confusedly though all ending the same way.




next he exhibited . . . milk to be examined after the same manner when
in the like substances were very visible only wth this Difference that
whereas the globular parts of the blood were /all/ of very differing /equall/ magnitudes
those of milk were exceeding Differing. these were exceeding white . . .
like little pearles whereas those of the blood were red.



Then the Latter part of mr. Leewenhoeks Letter was read wherein
the writer gaue an account of his obseruations on Phlegme -
wherein he had Discouerd the same globules as in the blood but that the
vesicles as he conceiud of them had Receiud some kind of corruption
and greenesse, As also of a sort of exceeding small vermiculs in Pepper water not
one thousandth part as thick as a hair. but 3 or 4 times as long as thick
these shot very nimbly through the water and Length of their shoot was but about
1/2 a hairs bredth. In old pepper water also he had found eels noe thicker than the
former & but one hundredth part in length of the length of an eel in
vineger -

Ref: CELL/RS/HF_146  © Centre for Editing Lives and Letters