WOODY TISSUE. 
83 
elongated cells of cotton, in which the peculiar characters 
I have described, are delineated, they may be contrasted 
with the figures of true woody fibre, and also with 
wool (Fig. 71), and silk (Fig. 72), and itwill be 
fig. 71 . FIG. 72 . 
Wool of sheep. Filaments of silk. 
seen that these textile materials are readily distinguish- 
able by the microscope. 
Mummies have, at various periods, been brought to 
this country and unrolled, and it has been a matter of 
G 2 
