REPORT OF ANALYSES OF PARIS GREEN AND 
OTHER INSECTICIDES IN 1901.* t 
L. L. VAN SLYKE AND W. H. ANDREWS. 
SUMMARY. 
In accordance with the provisions of a law designed to pro- 
tect purchasers of Paris Green, samples were secured during 
1901 and the results are published in this Bulletin. 
In the 40 samples of Paris Green examined, the arsenious 
oxide varied from 56.13 to 62.87 per ct. and averaged 58.10 per 
ct. The water-soluble arsenious oxide varied from 0.88 to 2.64 
per ct. and averaged 1.28 per ct. 
The copper oxide varied from 26.53 to 31.14 per ct. and 
averaged 29.88 per ct. The amount of arsenious oxide in com- 
bination with copper varied from 49.70 to 57.72 per ct. and 
averaged 55.98 per ct. The general result of the examination is 
to show a good quality of Paris Green in the market at the 
time the samples were taken. 
There are given, in addition, analyses of English Bug Com- 
pound, Laurel Green, London Purple, and Paris-Green-Bordeaux- 
Mixture. 
INTRODUCTION. 
During the year 1901, there were collected for analysis forty 
samples of materials sold as Paris Green, and also two samples 
of Laurel Green and one sample each of English Bug Compound, 
London Putple, Paragrene and Paris-Green-Bordeaux Mixture. 
The forty samples of Paris green represent twenty different 
manufacturers, eight of whom were not represented in the 
samples examined by us in 1900. 

*Printed by the authority and under the direction of the Commissioner 
of Agriculture. 
+A reprint of Bulletin No. 204. 
