ABNORMAL MILKS. 59 



not show any unusual properties, but in a few hours 

 becomes so viscid that a spoonful of it may be lifted 

 several inches without breaking the connection be- 

 tween the two portions. The nature and cause of the 

 change are not known. The phenomenon generally 

 appears rather suddenly and does not last long, almost 

 always disappearing promptly on the advent of colder 

 weather. Cases are known in which the milk thus af- 

 fected has been used as food without any apparent 

 unfavorable effect. 



