290 ANIMAL COMPETITORS 
should be remembered, however, that in most 
states laws exist relative to the putting out of 
poisons; and every man should inform himself 
as to these laws in his locality before beginning 
operations. 
Phosphorus and arsenic. The poisons most 
commonly used to destroy mammal pests in 
America are phosphorus, arsenic, and strych- 
nine. 
Yellow phosphorus seems to be the one 
most in use for the destruction of rats and 
other rodents, but there are several serious ob- 
jections to it. First, a fourth of a grain is a 
dangerous and sometimes fatal dose for a 
human being.‘ Second, its slow, irritant ac- 
tion causes needless torture to the animals 
killed—something we have no right to do. 
Third, it is very likely to cause disastrous fires. 
This substance is kept and cut under water and 
should not be touched with the hands. Its. 
efficiency depends upon the fineness of its divi- 
sion, which is accomplished by first dissolving 
1 Essence of turpentine is said to be a positive antidote for 
phosphorus poison, and a cure for external burns by this 
element. 
