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This difcovery appear’d to me very wonderful^ 
and I am apt to think, that it will be very difficult 
to penetrate any deeper into the hidden Strudure of 
the mufcular Fibres, and the manner by which they 
receive their Nourishment. I muft confefs that this 
Observation gave me an inward pleafure and fatis- 
fadion, which made me amends for fome Reflections 
lately thrown upon me by a certain Foreign Gentle- 
man, who, if this ffiould come to his knowledge, 
would perhaps write to me again, as he did once be- 
fore, that I related things which no Eye had ever feen. 
Having committed thefe things to paper, my 
Thoughts ran again upon the mufcular Fibres* and 
confidering what I had faid formerly concerning 
them, that they were compofed of long, fmail Fila-^ 
ments, now 1 was not fatisfy’d therewith, and there- 
fore endeavour’d to difeover, whether thefe fmail Fi- 
laments, which compofe a carnous Fibre, might not 
really be fo many fmail Veffels. With this defign, 
I took part of the fleffi of a Whale, which I had* 
kept fome Years by me, and cut it into very thin 
Slices diredly acrols the Fibres, and having moiflned 
thefe thin Slices with fair Water, I placed them upon 
feveral Glaffes, and before feveral Microfcopes, when 
I obferv’d that what I had formerly taken for fmail 
Threads or Filaments, were in reality exceeding 
fmail Veffels. I then cut part of the Whale’s Fleffi 
lengthwife, in order to difeover the Veffels, which 
convey the nutritious Juice out of the Membranes in- 
to the mufcular Fibres, which Veffels then appear’d 
to me in great plenty and very diftindv 
I afterwards took another piece of the fleffi of a 
very fat Ox, which I cut thro’ tranfverfly, and 
looking upon it with fome of my bed Microfcopes, 
X a I could 
