Physiological economy in nutrition, with special reference to the minimal proteid requirement of the healthy man / an experimental study

by R. H. Chittenden

Tuesday, May 24, 1904.

Breakfast.—Orange 100 grams, baked potato 138 grams, butter 5 grams, coffee 150 grams, sugar 14 grams.

Lunch.—Celery soup 150 grams, farina croquette 91 grams, syrup 48 grams, boiled onions 110 grams, potato 200 grams, stewed prunes 113 grams.

Dinner.—Tomato soup 150 grams, farina croquette 107 grams, syrup 48 grams, potato 200 grams, spinach 180 grams, cream pie 140 grams.

Food.		Grams.	Per cent Nitrogen.			Total Nitrogen.
Orange		100	×	0.20	=	0.200	grams.
Baked potato		138	×	0.25	=	0.345
Coffee		150	×	0.06	=	0.090
Sugar		14	×	0.00	=	0.000
Butter		5	×	0.15	=	0.008
Boiled onions		110	×	0.30	=	0.330
Celery soup		150	×	0.48	=	0.720
Potato		200	×	0.26	=	0.520
Farina croquette		91	×	0.74	=	0.673
Syrup	48 + 48 =	96	×	0.024	=	0.023
Stewed prunes		113	×	0.17	=	0.192
Spinach		180	×	0.54	=	0.972
Tomato soup		150	×	0.19	=	0.285
Potato		200	×	0.46	=	0.920
Farina croquette		107	×	0.76	=	0.813
Cream pie		140	×	0.93	=	1.302
	Total nitrogen in food					7.393	grams.
	Total nitrogen in urine					6.610

Fuel value of the food

2254 calories.

NITROGEN BALANCE.—Bellis.

		Nitrogen Taken in.		Output.
				Nitrogen in Urine.		Weight of Fæces (dry).
May	18	10.030	grams.	8.35	grams.
	19	6.383		9.60
	20	6.769		10.67
	21	9.596		8.46		51.0	grams.
	22	6.876		7.71		46.0
	23	7.288		5.98		27.2
	24	7.393		6.61		57.5
						181.7	grams contain 6.38% N.
		54.335		57.38	+	11.592	grams nitrogen.
		54.335	grams nitrogen.		68.972	grams nitrogen.

Nitrogen balance for seven days	=	-14.637	grams.
Nitrogen balance per day	=	-2.091	grams.