INJURIOUS INSECTS OF 1903. 



41 



While this sample was under consideration the dealer notified the 

 manufacturer, who, in turn, submitted a pound package 'from the same 

 shipment to a commercial chemist, who reported 25.56 per cent copper 

 oxide. Even oij the basis of this, the manufacturer's analysis, the sample 

 is short 4 to s per cent copper oxide and contains from 8 to 10 per cent 

 of arsenic in excess of the copper, which indicates that the sample is only 

 90 per cent pure. 



While this sample may correspond to the requirements of the New 

 York State law, where it is manufactured, by containing the requisite 

 amount of arsenic, over 14 per cent of the arsenic is not combined with 

 copper, as it should be in pure Paris Green. Deducting all impurities, 

 the sample on the basis of my analysis is not more than 80 per cent pure 

 Paris Green. 



Yours truly, 

 (Signed) ' HARRY SNYDER. 



Chemist. 



The eastern manufacturers, still insistent, had Paris Green 

 said to be from their stock analyzed by a chemist in New York 

 City, who sent them the following- report : 



iMg. 15. — A camera lucida drawing of 

 sample No. 5. 



Fig. 16. — A camera lucida drawing of 

 sample No. 10. 





Fig. 17. — A camera lucida drawing of 

 sample No. 11. 



^^a' 



Fig. 18. — A camera lucida drawing of 

 sample No. 16. 



