Chicken is one of the most digestible of meats, contains considerable
phosphorus and is particularly valuable as food for invalids. Turkey
is somewhat less digestible than chicken. Ducks and geese are
difficult of digestion, unless quite young, on account of the fat they
contain.

GAME.

Game, if well cooked, is fairly digestible.

SWEETBREAD.

Sweetbread, which is thymus gland of the calf, is a delicate and
agreeable article of diet, particularly for invalids. Tripe, heart,
liver and kidneys are other forms of animal viscera used as
food--valuable chiefly as affording variety.

FISH.

The chief difference in fish is the coarseness of fibre and the
quantity of fat present. Fish which are highly flavored and fat, while
they may be nutritious, are much less easy of digestion than
flounder, sole, whitefish, and the lighter varieties. The following
fish contain the largest percentage of albuminoids:--Red snapper,
whitefish, brook trout, salmon, bluefish, shad, eels, mackerel,
halibut, haddock, lake trout, bass, cod and flounder. The old theory
that fish constituted "brain food," on account of the phosphorus it
contained, has proved to be entirely without foundation, as in reality
many fish contain less of this element than meat. The tribes which
live largely on fish are not noted for intellectuality. Fish having