( •?<* ) 
fo exceedingly fmall, that it was impo liable for the 
Painter to reprefent them any otherwife than by 
Points. 
In this Figure are reprefented what we call the 
Membranes, but which indeed are nothing elfe but a 
Congeries of fmall VeiTels, which not only furround 
the Fibres, but enter into their very Subfiance.. 
Thefe, in the drying and fhrinking of the Object up- 
on the Plate, had been torn off from the Fibres, as 
may be feen at P, P, P. 
‘ When this was done, I put a fmall Drop of Wa- 
ter, about the fize of a Pin’s head, on this fmall Por- 
tion of Fibres, into which it immediately infinuated. 
and fwell’d them to. the fame bignefs, as when they 
were tirft laid upon the Plate : After which,. 1 defir’d 
the Painter to draw them, as they then appear’d to 
him, but to omit reprefenting the fmall Veflels, and 
only to defign the Circumference of every Fibre, 
which he did, as appears at Q, R , 5 , T , Fig. 5. 
I then clove a grain of Millet thro* the middle, and 1 
placing one half of it upon the Glafs, befide the por- 
tion of Fibres reprefented in Fig. 4. I defir’d the 
Painter to obferve the difference in bignefs between 
the half grain of Millet-feed, and that portion of Fi- 
bres y who told me, that the half grain appear’d 
larger than the portion of Fibres, and fo faid Iikewife 
a fecond Perfon that view’d them. By which one 
may eafily imagine, in how fmall a fpace that number 
of Fibres is comprehended, each of which confifls 
of fo many Velfels. I caus’d the Painter to repre- 
fent the half grain of Millet at Fig. 6 . 
I Iikewife made my Obfervations upon the Mufcu^ 
lar Fibres of a Pike, a Roach, Schar, and Flounder, 
in 
