[ i*6 ] 
an infinite number of others, which are 
fueceffively fmaller, and placed parallel 
to each other. 
The fafciculi are enveloped by cellular 
membrane, as is alfo each conflituent 
fibre. Where the fibres are very fmall, 
the cellular membrane is very thin and 
delicate, and is moiftened by a fubtile va¬ 
pour. In proportion as the parts are 
larger, the cellular membrane becomes 
thicker and more obviouS, and an oily 
fluid is fecreted by the arteries in lieu of 
vapour. 
Betwixt thefe fafciculi are conflantly 
found partitions • of cellular membrane, 
which keep them farther removed from 
each other, and difpofe them in a parallel 
or inclined direction. They are fur- 
rounded by two denfe membranes, of 
which the inner is continued from the 
partitions, and the outer ferves to fepa- 
rate them from the adjacent flefh. 
The 
