OFFICIAL INSPECTIONS 47. 1$ 



has been held by the executive of the Maine Insecticide Law 

 that the plainly printed statement of the chemical analysis in 

 these terms conforms to the requirements of the law, although it 

 would have been better if it could have been stated in terms of 

 arsenic. A little more than 75 per cent of arsenious oxide is 

 arsenic, and a little more than 65 per cent of arsenic oxide is 

 arsenic. 



Paris Grefn. 



Several samples of Paris green were examined in 1912 and 

 like all of the other greens which we have examined they carried 

 more arsenious oxide than could be combined with the copper 

 present. That is, the total arruount of arsenic exceeded in every 

 instance the minimum required under the law. This follows, 

 as pointed out in earlier publications, from the fact that white 

 arsenic is the cheapest ingredient that goes into the makeup of 

 Paris green, and hence the manufacturers will always use as- 

 much of it as possible and still have a green of good color. 



The injurious effect to foliage resulting from the use of 

 Paris green is due not to the arsenic that is in combination with 

 the copper but the free water soluble arsenic. Under the statute- 

 a very liberal amount, equivalent to 3.5 per cent of arsenious 

 oxide, or 2.65 per cent arsenic is permitted in the case of water 

 soluble Paris green. 



Ansbacher's Paris Green was full weight, a half pound pack- 

 age carrying 8.1 ounces. Its total arsenic was 42.75 or con- 

 siderably in excess of the minimum; the arsenic in the water 

 soluble form w^as 2.86 per cent, or .2 per cent in excess of the 

 m.aximum allowed by the law. 



Herrmann's Hi-Grade Pure Paris Green, made by Morris. 

 Herrmann & Co., of Chicago, carried 42.82 per cent of arsenic- 

 and 3.14 per cent of arsenic in the water soluble form. It was^ 

 therefore, adulterated under the law because it contained too 

 much free arsenic. The goods were full weight, as the half 

 pound package contained 8.4 ounces of Paris green. 



The Lion Brand Strictly Pure Paris Green made by the Jas. 

 A. Blanchard Co., of New York, was not registered ; was short 

 weight, a pound package carrying 15.1 ounces; and it carried 



