19 168+136 96 97 57.5 60.5 19C 100+115 98 90 -22 -15 20 105+115 122+118 106 116 0 55 20C 150+120 154+154 118 140 30 48.5 21 152+111 154+155 64 66 20 38 21C 140+136 174+150 86 93 70.5 88 23 150+119 157+157 85 80 49.5 62.5 23C 122+115 141+141 81 88 4 64 27 108+ 92 114+ 95 110 112 -25 25.5 27C 115+105 101+118 72 98 2 39.5 28 150+148 176+168 81 83 29.5 77.5 28C 178+148 172+157 95 94 64.5 83.5 any very consistent tendency toward improvement. The question, whether or not the results are affected by the differences in time interval, will be considered later. In weight, the test group showed an average gain of 11.013 pounds, with a median of 9.1 (Table XV). The average gain of the control group was 9.113 pounds and the median 6.8. The gains in the test group are less variable than those of the control. The average of the gains of the test group in excess of those of the control is 1.9 pounds, and the median is 2.2 pounds; while the unreliability of the difference is +- 1.46 The average, then, is only 1.30 P. E. and the median 1.51 P. E. If we turn to Table III and compare the results there set forth with the results at the end of the second period, we find the gains of the test group exceed those of the control in the following manner. TABLE XV Weight, Second Retests, 15 Pairs N[16] Test Group (A) Control Group (B) Test 1 Test 3 Gain Test 1 Test 3 Gain A-B