33 



Milk Containing Medicines. 



Lewald's experiments have proved that medicinal substances 

 are rapidly conveyed by the milk ; so, for instance, lead, arsenic, 

 oxide of zinc, sub-nitrate of bismuth, tincture of iodine and iron, 

 antimony, and mercury salts. ' 



It has not been determined that milk suffers, under the influ- 

 ence of these substances, also a quantitative change ; but the expe- 

 rience of physicians has demonstrated that medicines administered 

 to the mother act, through the medium of milk, upon the suck- 

 ling. 



Milk as the Cause of Disease. 



It is a well-known fact that the use of milk, especially during 

 the hot season, when it undergoes changes quite rapidly, is attended 

 with some risk. Only later investigations have proved that milk 

 may also cause specific diseases. Milk has, in many cases, proved 

 to be the bearer of disease germs, and thus has caused the trans- 

 mission of contagious and infectious diseases. 



Without reference to special cases, we will, to avoid prolixity, 

 only describe the diseases and their causes. 



The milk may be the cause of infection : 



i*""^ » 



•vVS. 



?. 



®, 



V 



\®^ 



• ' • "o J-, >x 





Milk containing algse, obtained from 



a cow which drank stagnant 



water. According to Low. 



Bacteria. 



1. By direct communication of the infection, derived mainly 

 from impure water, used either for watering cattle or as adulter- 



