C 56 ] 
E.E.E. The tranTparent diaphragms, 
E.F. F. Appearance of the parenchyma with 
fewer, but apparently regular veficles of air. 
G. Conferva Plinii A. dried between two pieces of 
glafs, and thereby contracted at the joints. The 
parenchyma of the plant had fluck thefe pieces 
of glafs fo faft together, that they were with 
difficnlty feparated. 
H. Conferva Plinii D. dried between two pieces 
of glafs. The apparently longitudinal fibres are 
nothing but foldings of the membranous tube ; . 
for, on moifiening the plant, and moving the 
pieces of glafs in different directions, thefe fold- 
ings increafe or decreafe arbitrarily. 
I. K. L. Appearances of Conferva Plinii, taken 
from three different places in the canals about 
Pifa, afterwards fleeped for fifteen days in com- 
mon water, then extended upon paper to dry, 
and put a fecond time into water for an hour. 
M. Appearance of a thread of the natural paper of 
Cortona, with the diaphragms NN appearing 
opaque. 
O. A thread of the fame paper, fteeped for an hour 
in common water. 
IX, Expe- 
