TABLE XV. . 

 Rats from mothers on Diet 13. 



* 33 gms.=average weight at death, the average age at death being 60 days. 



TABLE XVI. 

 Rats from mothers on Diet 13 M. 



* 35 gms.=raverage weight at death, the average age being 67 days. 



TABLE XVII. 

 (Results of Tables XV and XVI combined.) 



* 35 gms.=average weight at death, 64 days being the average age. 



The conclusions to be drawn from these regarding the 

 heat destruction of vitamin B in the dry state, confirm those 

 of the previous experiment in which the heated milk was fed 

 separately. The average gain in weight for eight weeks on 

 a control diet containing unheated milk and on the diets con- 

 taining the milk heated for 6, 24 and 48 hours is the same. 

 There is evidently no destruction of the vitamin by this treat- 

 ment or the amount of destruction is too small to be detected 

 by either of the methods employed in the present work. 



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