METHODS OF HAT DESTRUCTIOX. 



237 



In tests numbers 13, 14, and 15 squill-powder was laid down. 

 In all other cases the solution was used. 



As a result of our investigations, we have no hesitation in 

 coming to the conclusion that Squill-solution is the most effective- 

 rat-poison, and reconunend its use in preference to Barium 

 Carbonate for the following reasons : — 



(1) That for I'odents it is three times as toxic. 



(2) That it is even less harmfid to most domestic animals. 



The one point against the use of Squill lies in the fact that at 

 present it is somewhat more expensive than most other poisons. 

 The plant glows, however, in extraordinary abundance on both 

 the African and European coasts of the Mediterranean, and 

 therefore no difficulty should be experienced in obtaining a large 

 supply at a i-easonable cost. 



Virus. 



The discovery some time back of a bacillus pathogenic to 

 rodents led to a new method for the destruction of lals and mice. 

 Following this discovery, the virtdence of the organism was. 



