———————————————————————————+—————————+——————+—————————+—————————— | Proteins| | Carbo | Energy | | Fats |hydrates | in CONDITIONS +————+————+ +————+————+ Calories |Low |High| |Low |High| ———————————————————————————+————+————+——————+————+————+—————————— Man at light indoor work | 60 |100 | 60 |390 |450 | 2764 Man at light outdoor work | 60 |100 | 100 |400 |460 | 2940 Man at moderate outdoor | | | | | | work | 75 |125 | 125 |450 |500 | 3475 Man at hard outdoor work |100 |150 | 150 |500 |550 | 4000 Man at very hard outdoor | | | | | winter work |125 |180 | 200 |600 |650 | 4592 U. S. Army rations | 64 |106 | 280 |460 |540 | 4896-5032 U. S. Navy rations |... |143 | 292 |557 |... | 5545 Football team (old régime) |... |181 | 292 |557 |... | 5697 College football team (new)|125 |125 | 125 |500 |... | 3675 ———————————————————————————+————+————+——————+————+————+—————————— TABLE XII RATIONS VARIED FOR SEX AND AGE ———————————————————————————+—————————+——————+—————————+—————————— | Proteins| | Carbo- | Energy VARIATIONS OF | | Fats |hydrates | in SEX AND AGE +————+————+ +————+————+ Calories |Low |High| |Low |High| ———————————————————————————+————+————+——————+————+————+—————————— Children, two to six | 36 | 70 | 40 |250 |325 | 1520-1956 Children, six to fifteen | 50 | 75 | 45 |325 |350 | 1923-2123 Women with light exercise | 50 | 80 | 80 |300 |330 | 2272 Women at moderate work | 60 | 92 | 80 |400 |432 | 2720 Aged women | 50 | 80 | 50 |270 |300 | 1870 Aged men | 50 |100 | 400 |300 |350 | 2258 ———————————————————————————+————+————+——————+————+————+—————————— The unit of measurement for the calories of energy is the amount of heat required to raise the temperature of one kilogram of water from zero to 1° centigrade or 4° Fahrenheit. In estimating the number of calories of energy given off by the different foods, Dr. Hall represents 1 gram of carbohydrates as 4.0 calories 1 ” ” fats ” 9.4 ” 1 ” ” proteins ” 4.0 ” To determine the relative energy which a food represents, it is only necessary to multiply the number of grams of protein in that food by 4, the fat by 9.4, and the carbohydrates by 4, and add the results. Thus according to the food required for the average man at light work given on page 225: