TABLE XIII. 
Diet 107 and 8 cc. of milk treated in various ways. 
Age in weeks np 
: Total 
No. of Milk : 
rats treatient 4 5 6 7 8 9 10 11 12 gain for 
Average weight in grams 8 weeks 
10 Unheated 53 70 80 82 86 86 88 91 95 42 
10 Heated dry 6 hrs. 54 69 80 83 87 88 89 91 96 42 
10 Heated dry 24 hrs. 54 68 76 77 79 77 78 78 80 26 
10 Heated dry 48 hrs. 53 67 75 78 82 85 85 86 90 37 
10 Heated in fluid 
state 6 hrs. 54 66 71 67 63 60 57 57 60 6 
The results in Table XIV are those of an experiment sim- 
ilar to the one just described, but in place of 8 cc., each rat 
received only 7 cc. of milk, this séries of experiments having 
been completed before it was decided that 8 cc. would be the 
most satisfactory amount. In both experiments all the rats 
came from mothers on Diet 13 M. 
TABLE XIV. 
Diet 94 and 7 cc. of milk treated in various ways. 
Age ‘in week ; 
No. 4,: F Be uh wee Total 
Milk Milk : 
of 4 5 6 7 8 9 10 11 12 gain for 
rats oC Treatment 8 weeks 
Average weight in grams 
3 0 42 43 44 38 321 
3 7  Unheated 45 59 70 71 71 68 64 64 64 19 
4 7 Heated dry 6 hrs. 45 57 72 78 74 71 67 64 62 17 
4 7 Heated dry 24 hrs. 46 59 75 78 74 71 67 63 59 13 
4° 7 Heated dry 48 hrs. 40 50 61 66 69 68 64 57 57 17 
4 7 Heated in fluid 
state 6 hrs. 40 61 68 65 59 532 
132 grams = average weight at death, the average age being 53 days. 
253 grams = average weight at death, the average age being 62 days. 
There is apparently a measurable destruction of vitamin B 
when the milk is heated at 100° for 6 hours in the fluid state. 
The average growth curve for the ten rats receiving 8 cc. of 
the reconstructed milk heated six hours at 100° C. corresponds 
very closely to the average curve of the rats receiving 6 cc. of 
unheated milk (Tables V and VI). This indicates that ap- 
proximately one-fourth of the total B in the milk was destroy- 
ed when the fluid milk was heated for six hours at 100° C. 
19 
