TOXIC POISONING FROM MILK PRODUCTS. 139 



for a development of some of the organisms .which ordinarily 

 do not grow. But beyond such general suggestions nothing 

 is known as to why poisonous products do occasionally de- 

 velop in milk. Nor is there any method of guarding against 

 them. The fact that we do not know the source of the 

 organisms or the conditions under which they grow makes 

 it quite impossible to give, at the present time, any practi- 

 cal suggestions for allaying the danger of an occasional 

 poisoning from milk such as has been here described. The 

 general suggestion of cleanliness and the use of cream for ice 

 cream purposes only when fresh is, of course, a useful one, 

 but fails to solve the problem, and no suggestion can yet be 

 made for efficiently guarding against these poisonous prod- 

 ucts in ice cream and cheese. 



