The man engaged in muscular work requires plenty of food; he can digest foods which the professional or business man, or the man of sedentary habits, cannot. He will probably be able to drink coffee and tea without any disturbance to nerves or to digestion. In his muscular work he liberates the waste freely and needs fats, starches, and sugars to supply the heat and energy. This is especially true of men who work in the fresh air; the muscular action liberates waste and heat and the full breathing freely oxidizes the waste, putting it in condition to be excreted through lungs, skin, kidneys, and intestines. He should have more meat, eggs, and nitrogenous foods, and he also needs more carbonaceous foods to supply heat and energy, as given in Diet V. Three hearty meals a day are necessary. His muscular movements keep the circulation forceful and the vital organs strong so that his diet may be almost as heavy as that of the football player. Meat or eggs, twice a day, with tea or coffee, and even _pie_ may be eaten with impunity. He needs a good nourishing breakfast of bacon and eggs or meat, also potatoes, or a liberal allowance of bread and butter, corn bread, muffins, etc. DIET V _Breakfast_ _Calories_ 4 tablespoonfuls fresh or stewed fruit with sugar 100 3 tablespoonfuls oatmeal with milk and sugar 200 1 portion ham four inches square with fat 200 2 eggs 140 2 cups coffee with cream and sugar 250 2 slices bread and butter 250 ———— 1140 _Luncheon_ 2 sandwiches (cheese) 300 1 sandwich (marmalade) 125 1 pint of milk 200 1 slice cake or pie 100 ———— 725 _Dinner_