OFFICIAL INSPECTIONS 66. 49 



It rs necessary that every insecticide containing arsenic carry 

 in addition to the weight, a cheimical analysis stating the mini- 

 mum percentage of total arsenic and the maximum percenltage 

 of wiater solu'ble arsenic which it contains. Standards are fixed 

 for Paris green following the Fed'eral law so that Paris green is 

 adulteriated if it does not contain at least 50 per cenit of arseni- 

 ous O'xide (A'920=) or if it coinitains arsenic in water soluible 

 form that is equivalent to more than 3.5 per cent of arsenioiis 

 oxi'de (As20s) ; and in the case O'f lead arsenate it is adulterated 

 if it contains more than 50 per cent of water, if it contains total 

 arsenic equivalent to less than 12.5 per cent of arsenic oxide 

 (AS2O5) and if it contains arsenic in water soluble form equiva- 

 lent to more than .75 per cent of arsenic oxide (AS2O0). 



It is unfortunate that in the Federal Act the arsenic is stated 

 in two ways : one in the form of arsenious and the other as 

 arsenic oxiide, because it makes it difficult to comipare the 

 strength of ansienate of lead, for instance, with Paris green 

 from the analysis stated thereon. Inasmuch as the Fed'eral 

 Act requires the statemenit in the terms of arsenious oxide andi 

 arsenic oxide it is held 'by the executive of the Maine Insecti- 

 cide 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. 



The Federal Lav/. 



The Elaine law in its requirements is based upon the national 

 law. An insecticide that is in accord with the requirements of 

 the National law and that is registered in Maine can be lawfully 

 sold. The enforcement of the National law which has been 

 well begun will materially aid in the enforcement of the law 

 within this State. The following quoted from the Annual Report 

 of the Insecticide and Fungicide Board of the U. S. Department 

 of Agriculture about publicity under the federal law is encour- 

 aging in its bearing upon the sale of insecticides in this in 

 common with other states. 



"The advantage of carrying on a campaign of education 

 through which the trade, State officials, and the consuming pub- 



