I 7 6 



MILK AND ITS HYGIENIC RELATIONS 



of alimentary intoxication. Post-mortem examination gave no 

 evidence as to the cause of death. Later, Moro succeeded in 

 keeping guinea-pigs alive who were taken away from their mother 

 immediately after birth, but were given a low vegetable diet. He 

 then allowed the young ones to have mother's milk for periods of 

 o, I, 3, 5, 7 days, and so on. The young guinea-pigs were then 

 isolated and given a vegetable diet. Of those taken away 

 immediately after birth 80 per cent, died, of those left one day 

 30 per cent, died, of those left three days only 10 per cent, died, and 

 of those left for longer periods all lived. 



The weight-curves of the animals which survived are given in 



We/. 



2/0 

 200 

 190 

 180 

 170 

 ISO 

 ISO 

 14-0 

 130 

 120 

 110 

 100 



80 

 60 



40 

 30 

 SO 





 10 



Breast-milk 21 days 



7 - 



12345678910 IS 



20 25 30 35 40 



Days after birth. 



4-5 50 



GO 



DIAGRAM 7. Showing the value of breast-feeding for young guinea-pigs. 



The weight-curve of those deprived entirely of mothers' milk is represented 

 by crosses. 



Diagram 7. It should be noted that the result showed a progressive 

 improvement with the length of time they were allowed to be with 

 their mother, the superiority of the curve persisting up to the 

 sixtieth day of life, when the experiment was discontinued. 



These experiments show that guinea-pigs will not live upon a 

 cows' milk diet alone, but that they must have vegetable food. 

 I can also personally confirm this fact, from some experiments 

 carried out by me at the Lister Institute in 1908. (Unpublished.) 



Some experiments were carried out by Schroeder on guinea- 

 pigs bred under his own supervision. It was not possible to obtain 

 a sufficient quantity of young guinea-pigs at the same date, and 

 the experiments ranged over ten months, during which time some 



