New YorkK AGRICULTURAL EXPERIMENT STATION, 457 
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DEFECTS OF PRESENT PARIS GREEN LAW. 
In its present form the Paris green law of this State is seri- 
ously defective in several respects, most prominent of which 
are the following: 
ist. The present law wholly fails to protect consumers from 
adulteration of Paris green by water-soluble arsenic compounds, 
the most common of which is uncombined arsenious oxide or 
common white arsenic. 
2d. The total amount of arsenic required in Paris green by 
the present law, viz., the equivalent of 50 per ct. of arsenious 
oxide is needlessly low. In our examination of Paris green as 
sold in this State during the past two years, the lowest amount 
of arsenic found was 55.34 per ct., over five per ct. above the 
present required standard. 
3d. The law fails to require that the arsenious oxide in Paris 
green should be in combination with copper. This omission 
offers opportunity for serious abuse. Sample No. 50 offers a 
good illustration of this. In that case there is not one-fourth 
as much copper as should be present to combine with the 
arsenic. a 
In order to remedy these defects, the section of the law that 
so completely fails to define Paris green, sae be changed so 
as to cover the following points: : 
Ist. Paris green should be required to contain an amount of 
arsenic in combination with copper equivalent to 54 per ct. of 
arsenious oxide. ~ a Sfetre. sae 
2d. Paris green should be legally declared adulterated if it 
contains arsenic in water-soluble forms equivalent to more than 
three per ct. of arsenious oxide. 
