MILK AND ITS HYGIENIC RELATIONS 



Kaiserin-Auguste-Viktoria-Haus, from Bolle's dairy, and from the 

 Viktoria Park dairy, with the following results : 



Kaiserin-A uguste- Viktoria-Haus . 



1. Direct into glass . . 0-263-0-694 mg. per litre 



2. Mixed milk . . . 0-64, 0-92, 1-005 m - per litre 



1. Direct into glass . 



2. Mixed milk 



Bolle's Dairy. 



0-35-1-0 mg. per litre 

 . 1-12-1-53 mg. per litre 



Viktoria Park Dairy. 

 i. Direct into glass . . . 0-25-1-2 mg. per litre 



These very considerable variations do not appear to be fully 

 explained. The authors make no mention of the period of lactation 

 at which the various samples of milk were taken. 



Langstein (1911) suggests that this increase in the iron content 

 of the milk by the iron derived from the vessels (if this really 

 occurs) may not be of any use to the infants, as the iron may not 

 be assimilable. 



The work of Krasnogorsky (1906) supports this supposition. 

 Krasnogorsky investigated the iron metabolism of several infants 

 fed naturally and on goats' milk. Several days were allowed to 

 elapse after the commencement of the dietary before the estima- 

 tions were begun, and when the same child was used for two 

 sets of experiments, a considerable interval occurred between the 

 experiments. 



The following table summarises the general outline of the 

 work: 



These figures demonstrate the immense superiority of the 

 milk of the same species as regards the power of absorption and 

 retention of the iron. 



A few experiments were also carried out on iron metabolism 



