fed in doses of 2 cc., 4. cc., 6 cc., 8 cc., 10 cc., 12 cc., 15 cc., per 
rat per day. These amounts were fed without regard to the 
weight of the rat and the same amount was fed throughout 
the experimental period. The data are summarized in Tables’ 
V and VI and Chart I, Figures I and II. 
TABLE V. 
Diet 94 and unheated milk. 
No: Milk Age in weeks Total 
of 4 5 6 7 8 9 10 11 12 £2" Remarks 
rats day “Average weight in grams wks. 
6 2 50 57 61 60 57 53* : see (1) below 
6 4 47 58 60 56 53 50* see (2) below 
ee: 
86 95 99 108 116 71 
6 10 45 56 67 76 85 94 99101 107 62 ee 
6 12 46 58 74 84 92 99 99103 113 67 . 
6 15 48 65 81 90 100 108 107111 110 62). 
K. = killed. D. = dead. 
* Since all rats did not live till the end of the experimental period, 
averages could not be given for the last three weeks. 
(1) 4 rats D. at 64, 65, 77, 77 days. 
' 2 rats K. at end of 12th wk. 
(2) 4 rats D. at 63, 66, 70, 74 days. 
2 rats K. at end of 12th wk. 
TABLE VI. 
Diet 107 and unheated milk. 
No. Milk Age in weeks Total 
of ie 4 5 6 7 8 9 10 it 12 £8" Remarks 
rats day Average weight in grams wks. 
10 0 51 54 52 47 37 see (1) below 
10 6 51 61 70 70 66 61 61 62 66 15 
10 8 51 65 78 84 84 83 83 86 91 40 
10 10 50 65 80 90 92 91 95 100 105 55 
10 12 50 67 85 97 102 105 110 115 120 70 
(1) 37 gms.=average weight at death. 
56 days=average age at death. 
It will be noted that in both experiments (Tables V and VI) 
the largest difference in weight gained for the same difference 
in milk fed comes between 6 cc. and 8 cc. In order to prove 
13 
