J 
- 
4 
41 
Fig. 30.—Shagbark Hickory (Carya alba, Walnut Family, Juglandacee). 
A single leaf. Staminate flower-cluster. Staminate flower, under side, 
enlarged. Twig bearing a single fruit. Nut. (Britton and Brown.)— 
A large tree becoming 36 m. tall; bark shaggy in narrow plates, gray; 
young twigs and leaves slightly hairy becoming smooth; flowers green- 
ish; fruit greenish brown; nut almost white. 
in that the nutritive part is contained within the seed, 
but differ from them in that the seeds ripen in a rather thin- 
walled pod which opens at maturity by splitting in halves 
from end to end. 
The very large amount of nutriment in proportion to 
bulk, together with the small percentage of water and oil 
(see chart) renders beans and peas among the very best 
foods for storage, and particularly adapts them for use upon 
long voyages. That they are highly nutritious is shown 
by the large amount of proteid they contain. This, however, 
is found to be of a sort resembling the proteid of cheese; and 
is not so easily digestible as that found in cereals. 
35. Earth-vegetables we shall find to be a convenient 
numerals being added to distinguish them. Thus in the above refer- 
ence to the pictures of kidney-bean, Fig. 39 is understood as applying 
to Fig. 391 and Fig. 391, 
