144 MAINE AGRICULTURAI, KXPERIM^NT STATION. I913. 



say in part ; "In the first place let us explain that the F. W. 

 Devoe & C. T. Raynolds Company is a corporation organized 

 under the laws of the State of New York. Devoe & Raynolds 

 Company is an entirely separate corporation organized under 

 the laws of the State of Illinois. We each have certain financial 

 interests, one with the other. We do not, however, in any way 

 dictate what shall be their business policy nor their manufac- 

 turing methods." 



Because of the similarity of the brand, of the analysis and 

 of the name of the manufacturers, and that Devoe & Raynolds 

 Company claimed to be in New York on their Arsenate of Lead 

 label, the writer confounded the two concerns. The facts do 

 not warrant the statement given in Official Inspections 47, page 

 16, that an action was brought against the F. W. Devoe & C. T. 

 Raynolds Company by the United States, and that such com- 

 pany was fined. The purpose of this paragraph is to retract 

 that statement. Incidentally the writer is glad to note that this 

 year C. T. Raynolds's Strictly Pure Paris Green may by F. W. 

 Devoe & C. T. Raynolds Company of New York is in conform- 

 ity with the Maine Insecticide Law. 



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. Several samples of Paris green were ex- 

 amined previous to 191 3 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 amount 

 of arsenic exceeded in every instance the minimum required 

 under the law. This follows, as pointed out in earlier publica- 

 tions from the fact that white arsenic is the cheapest ingredient 

 that goes into the makeup of Paris green, and hence the manu- 

 facturers will always use as much of it as possible and still have 

 a green of good color. It is gratifying to note the marked im- 

 provement in the quality of Paris green in respect to its water 

 soluble arsenic. Practically all of the greens made in 1913 carry 

 less than 3.5 per cent water soluble arsenic. Most of the sam- 

 ples reported in the table as having an excess of water soluble 

 arsenic were goods carried over from 19 12. 



