Daily diet same as Oakman’s, except that on the 12th 190 grams stewed tomatoes and 190 grams macaroni were uneaten; on the 13th at breakfast 25 grams of coffee were left, and on the 14th at breakfast 25 grams coffee were not taken. Corrections in intake of nitrogen made accordingly. [Illustration: COFFMAN STELTZ _Photographs taken at the close of the experiment._] NITROGEN BALANCE.—_Cohn._ Nitrogen Output. Taken in. Nitrogen in Urine. Weight of Fæces (dry). Jan. 12 7.793 grams. 6.49 grams. 13 9.957 9.10 29.0 grams. 14 7.412 7.33 8.5 15 8.320 8.04 44.0 16 7.282 8.58 19.0 17 8.349 7.44 5.5 ------ ------ ------ 106.0 grams contain 6.48% N. 49.113 46.98 + 6.87 grams nitrogen. ------ ---------------------- 49.113 grams nitrogen. 53.85 grams nitrogen. Nitrogen balance for six days = -4.737 grams. Nitrogen balance per day = -0.789 gram. Daily diet same as Oakman’s, except that on the 15th inst. at supper 60 grams fritters were uneaten, and on the 13th at breakfast 30 grams coffee, and at dinner 22 grams apple sauce were uneaten. Corrections made accordingly. NITROGEN BALANCE.—_Broyles._ Nitrogen Output. Taken in. Nitrogen in Urine. Weight of Fæces (dry). Jan. 12 7.475 grams. 5.38 grams. 13 9.495 6.99 14 6.814 7.47 15 8.036 9.67 35 grams. 16 6.695 7.65 14 17 7.762 5.28 20 ------ ------ ------ 69 grams contain 6.61% N. 46.277 42.44 + 4.56 grams nitrogen. ------ ---------------------- 46.277 grams nitrogen. 47.00 grams nitrogen. Nitrogen balance for six days = -0.723 gram. Nitrogen balance per day = -0.120 gram. Daily diet same as Oakman’s, except that each day coffee was omitted from breakfast and dinner. Corrections made accordingly. SECOND NITROGEN BALANCE. Commencing February 29, a second nitrogen balance was attempted with very different results. This balance period extended through seven days and was characterized by an average daily intake of 9.50 grams of nitrogen, an increase of 1.3 grams of nitrogen per day over the preceding period, together with an average fuel value of the food equal to 2500 calories per day.