the tuber the more starch it contains.

_Turnip and Cabbage_ are 92.5 per cent. water, and, consequently, poor
in nutrition, though they are very palatable. The solid portions of
cabbage, however, are rich in albumen.

It is evident that the quantity necessary to maintain the system in
proper condition must be greatly modified by the habits of life, the
condition of the organism, the age, the sex, and the climate. The daily
loss of substance which must be replaced by material from without, as we
have seen, is very great. In addition to the loss of carbon and
nitrogen, about four and a half pounds of water are removed from the
system in twenty-four hours, and it is necessary that about this
quantity should be introduced into the system in some form or other,
however much it may be adulterated. Professor Dalton states: "From
experiments performed while living on an exclusive diet of bread, fresh
meat, and butter, with coffee and water for drink, we have found that
the entire quantity of food required during twenty-four hours by a man
in full health and taking free exercise in the open air is as follows:

Meat, . . . . . . 16 oz., or 1.03 lb. avoir.
Bread, . . . . . . 19 " 1.19 " "
Butter or fat, . . . 31/2 " 0.22 " "
Water, . . . . . 52 fluid oz., 3.38 " "

That is to say, rather less than two and a half pounds of solid food,
and rather over three pounds of liquid food."

CLIMATE exerts an important influence on the quantity and quality of
food required by the system. In northern latitudes the inhabitants are
exposed to extreme cold and require an abundant supply of food, and
especially that which contains a large amount of fat. On this account
fat meat is taken in large quantities and with a relish. The quantity of
food consumed by the natives of the Arctic zone is almost incredible.
The Russian Admiral, Saritcheff, relates that one of the Esquimaux in
his presence devoured a mass of boiled rice and butter which weighed
twenty-eight pounds, at a single meal, and Dr. Hayes states that usually
the daily ration of an Esquimau is from twelve to fifteen pounds of
meat, one-third of which is fat, and on one occasion he saw a man eat
ten pounds of walrus flesh at a single meal. The intense cold creates a
constant craving for fatty articles of food, and some members of his own
party were in the habit of drinking the contents of the oil-kettle with
great apparent