132 STORRS AGRICULTURAL EXPERIMENT STATION. 
Child 6-9 years old requires 0.5 the food of a man at moderately active mus- 
cular work. 
Child 2-5 years old requires 0.4 the food of a man at moderately active mus- 
cular work, 
Child under 2 years old requires 0.3 the food of a man at moderately active 
muscular work. 
These factors are based in part upon experimental data and 
in part upon arbitrary assumptions. They are subject to re- 
vision when experimental evidence shall warrant more definite 
conclusions. 
In making dietary studies in this country blanks are usually 
prepared to be filled out with statistics of the amounts, kinds, 
cost, and estimated nutrients of the food purchased, wasted, 
and actually consumed, and information concerning the num- 
ber, sex, age, and occupation of the persons for whom the food 
is provided. If further data are gathered concerning the health, 
nationality, income and general conditions of the individuals of 
families, the results of such inquiries have a wider physiological 
and sociological bearing. These supplementary statistics have 
been collected in considerable detail in late studies in the United 
States. 3 
Within a short time past a considerable number of dietary 
studies have been made in Great Britain by use of the sched- 
ules now commonly employed in the United States. ‘These. 
schedules, which are the outcome of considerable experience, 
are prepared by the U. S. Department of Agriculture for use 
by those who cooperate with that Department in nutrition in- 
vestigations in different parts of the country. It is to be hoped 
that this cooperation, which has been so well developed in our 
own country and is already extending outside, may be still 
further increased, because a large number of observations of 
such sort as to be easily compared one with another are the 
best possible means for learning some of the most important 
facts which bear upon the nutrition of man. Awaiting such 
detailed, accurate and comparable information, we may make 
use of the information which has already accumulated and is 
of very great interest. 
Many interesting things come to light on comparing the 
dietaries of persons with different occupations and incomes 
and performing different amounts of muscular work. A com- 
parison of the dietaries of the inhabitants of different countries | 



2: 
