( 1 }° ) 
Fibres, that they were in a manner invifible even 
through my bed Microfcopes. 
The very fmall Velfels, which compofe this Mem- 
brane, (as it is call’d) are doubtlefs framed to con- 
vey fome nutritious Juices, yet they are fo fmall, 
that the Globules of Blood cannot pafs through 
them. 
That this might be the better underftood, I caufed 
a fmall piece of the Membrane to be defigned, as at 
Fig. i. J.B.C. D . which, with the adjoining flefhy 
Parts, is cut thro* tranfverfly, and fince it was im- 
pofiible for the Defigner to draw the extraordinary 
number of Veftels, which compofed it, on account of 
their being fo exceeding fmall, he has reprefented 
them only by Points. 
Altho’ in my former Letters I gave fome Draughts- 
of the Carnous Fibres cut thro’ crofs-way along with 
the Membranes, yet for the fatisfadion of thofe who- 
have not feen my other Letters, I have given them 
here another Draught of the fame. See Fig. i. be- 
tween E, F G. and H, L 
Thefe carnous Fibres, when wet, lay fo clofe to 
each other, that the fpace between E, F. G. and H. 
was quite fill’d upj. but when dry’d, the Fibres 
were fo fhrunk, that one might fee fuch Spaces be- 
tween them as are here delineated. 
Now as we fee, upon the drying of the Membranes 
A . F. G. and D. E . G. with the Mufcular Fibres: 
between them, what a number of fmall Ramifica- 
tions proceed from the Membranes, as is here re- 
prefented between the mufcular Fibres } we mud not 
imagine, that thefe Ramifications proceed only from 
the points here reprefented, but that they are con- 
tinued the whole length of the Fibres, and fubdi- 
viding 
i 
