REPORT OF THE DIRECTOR. Ores 
and make suggestions for improvements. At the same time 
the experiments bring new and valuable information regarding 
economical feeding of cows for the production of milk and 
butter. The experiments of the previous years have pointed 
quite clearly to the value of rations with a narrow nutritive 
ratio, that is with large proportions of protein, for the produc- 
tion of milk and butter. Wherever a wide ration has been 
found in use an increase of the nitrogenous feeding stuffs has 
been proposed, and usually with profitable results so far as the 
short experiments indicated. It is encouraging to observe that 
these facts are apparently becoming more familiar to dairy 
farmers. Ina number of cases, during the experiments of the 
past year, the ration in use was found to be so well balanced 
that but little change could be suggested, and the results of 
the tests as regards improvement in production of milk or 
butter were consequently less marked than in former years. 
FOOD AND NUTRITION OF MAN. 
The inquiries on the food and nutrition of man carried on 
by the Station in cooperation with the United States Depart- 
ment of Agriculture for several years past have been continued. 
These include analyses of food materials, studies of dietaries 
of different classes of people, digestion experiments with men, 
determinations of the fuel values of food materials, and expe- 
riments with men in the respiration calorimeter. With the 
exception of the dietary studies, investigations in each of these 
lines have been made during the past year. The determina- 
tions of the composition, digestibility, and fuel values of food 
materials were made in connection with the metabolism expe- 
riments with men in the respiration calorimeter. Twelve 
metabolism experiments were made during the past year, the 
details of which will appear in other publications. Some of 
the results of the work are given in the present report. Ar- 
rangements are now being made for similar experiments. with 
domestic animals. 
ANALYSES OF FOODS, FEEDING STUFFS, ETC. 
In connection with the inquiries of the Station, a large num- 
ber of chemical analyses are required. These include analyses 
of crops grown in the tests with fertilizers, and of foods and 
other materials used in the metabolism experiments with man. 
