The difficulty of obtaining 24-hour amounts of urine, and the total amount of feces, separately, in babies explains why so few metabolism experiments have been performed during the first year of life. Schabad recently described1 all the kinds of apparatus which have been used with varying success up to date. The article is very exhaustive and includes his own among other apparatus. These devices are either cumbersome, or difficult to make and procure, and I venture to describe a very simple apparatus which I have used successfully during the past year in collecting the total amount of urine and feces passed by male babies during periods of three days each.
The necessary materials are a small Bradford frame, a towel, two cloth straps each 12 or 14 inches long by 1½ inches wide, safety pins, an ordinary test tube of good glass, zinc oxid surgeons' plaster, and a rubber tube