328 CONKECIICUT EXPERIMENT STATION REPORT, I907-I908. 



Analyses of Paris Green. 



1948 1 

 18662 

 18634 

 18509 

 18704 



19547 

 18569 

 18508 

 18512 

 18510 

 1S511 

 18663 



Manpfacturer. 



Ansbacher 



tt 



Barry 



Blanchard 



Hermann 



Leggett .- 



(i 



Pfeiffer-- 



Raynolds 



" /... 



Sherwin-Williams 



cts. 



13 

 10 



35 

 18 

 10 

 18 

 10 

 20 

 20 

 28 

 10 

 10 



Weiefat of 

 Package, 



OZ. 



*4 



4 



*I6 



* 8 



4 



* 8 



*4 

 8 

 8 



*i6 



*4 



4 



OZ, 



3-6 

 4.0 

 14-5 

 8.0 

 50 

 7.6 

 3.6 

 7.3 

 8.0 



15.4 

 4.0 

 3.6 



Arsenious Oxide. 

 (AsaOs). 



% 

 57.92 

 57.44 



57-23 

 56.62 



5703 

 56.20 

 60.61 

 56-83 

 56.71 

 60.83 

 61.19 

 56.56 





1.46 

 0.97 

 I.71 

 2.44 

 2.44 

 2.44 

 5-85 

 2.92 

 1.46 



1-95 

 2-44 

 1.46 



o 5 

 en >• 



o ; 



0.9 



% 



,92 28.76 

 44 29.49 

 82 29.55 



29.01 

 28.14 



28.54 

 27.15 



2934 

 30.27 

 26.56 

 27.15 



.92I29.88 



S o o 



i 

 53.78 

 55-15 

 55.26 



54-25 

 52.62 



53.37 

 50.77 

 54.87 

 56.60 



49.63 

 50-77 



55.88 



All the samples were carefully weighed with and without 

 the container; one sample was overweight, four equalled the 

 weight claimed, and seven were short weight. These shortages 

 varied from 4 to 10 per cent., not large in any case, but indicat- 

 ing that the manufacturers' claimed weight is intended to include 

 the weight of the container as well as the green itself, a practice 

 without justification. 



CHEMICAL ANALYSIS. 



Total Arsenious Oxide. All the samples contained satisfactory 

 amounts of total arsenious oxide, varying from 56.20 to 61.19 

 per cent, with an average of 57.93 per cent; this average is 

 only slightly lower than the equivalent of arsenious oxide con- 

 tained in pure copper aceto-arsenite. Judging, therefore, alone 

 from the content of arsenious oxide, it would appear that the 

 Paris g^een on the market in Connecticut is of high quality. A 

 definite decision as to the purity of the green, however, cannot 

 be reached without considering also the amount of water-soluble 

 arsenic present. 



Water-Soluble Arsenious Oxide. Free arsenious oxide is 

 always soluble in water, and the combined arsenic is liable to be 



* Weight printed on label ; in all other cases the weight is assumed from 

 the size of package and price asked. 



