A FEW COMMON FOODS. 
149 
flour, from the seeds of corn; and tous-le-mois, 
from the root-stocks of the canna. 
8 . To force a man to live on nothing but these 
starch-foods would be to 
condemn him to death by 
slow starvation ; for, of 
course, he would not find 
in them the flesh-formers 
that are necessary. But, 
as they are very digestible 
foods, they are often good 
for invalids. 
9. The animal foods 
mostly eaten are beef, 
mutton, and pork; poul- 
try, fish, milk, and eggs. 
Though it is well that 
this kind of food should 
form a part of our diet, 
it is possible to keep up 
life and strength without 
• . i i • r* A highly magnified view of a fibre of 
It), Dy cl proper cnoice 01 Striped Muscular Tissue, with its inclos- 
fruits and vegetables. 
Animal food is good 
for us because of the 
large share of flesh-formers in it. It also has the 
heat-giver, fat, as well as a large quantity of 
water. 
10. With the help of the microscope we find that 
Portion of a Voluntary Muscle— show- 
ing its plan of structure, a , A fibre. 
b, The minute threads of which a fibre is 
formed, c, Ends of the fibres. 
ing sheath of Sarcolemma. In this case 
the fibre has been torn, and the torn ends 
separated, but the delicate and elastic 
sheath still stretches between them. 
