DEPARTMENT REPORTS. 



137 



ARSENATE OF LEAD. 



Six samples of arsenate of lead paste and nine of the powder form were 

 analyzed. All of the samples contained the required amount of arsenic 

 oxid and were above the guarantees made by the manufacturers. Like- 

 wise all samples were well under the guarantees for soluble arsenic oxid. 

 One sample, No. 429, contained water in excess of the legal standard. 



ARSENATE OF LEAD (Paste) 



No. 



429 

 431 

 197 

 455 

 467 

 426 



Manufacturer. 



.\nsbaclier Insecticide Co., New York, N. Y, 



Dow Chemical Co., Midland, Mich 



GrasselliChemicalCo., Cleveland, Ohio. . . 

 GrasselliChemical Co., Cleveland, Ohio. . . 

 GrasselliChemicalCo., Cleveland, Ohio. . . 

 Toledo Rex Spray Co., Toledo, Ohio 



Lead 0.\id. 

 (PbO) 



Found. Guar, 



30.80 

 33.20 

 40.71 

 34.30 

 36.47 

 33.09 



35.0 



32.00 



Arsenic O.ud (AS2O6) 



Total. 



Found. Guar 



15.72 

 18.10 

 19.71 

 16.80 

 17.07 

 16.83 



/o 



15 



15 



15 



15.00 



15.00 



15.00 



Soluble. 

 Found. Guar. 



IS 

 0.31 

 0.08 

 11 

 0.15 

 0.15 



50 

 0.50 

 0.50 

 0.50 

 0.50 

 0.75 



ARSENATE OF LEAD (Dry, Powder). 



No. 



464 

 807 

 443 

 809 

 456 

 423 

 465 

 469 

 804 



Manufacturer. 



Corona Chemical Co., Milwaukee, Wis. .^. 



Corona Chemical Co., Milwaukee, Wis 



Detroit tVTiite Lead Works, Detroit, Mich 



Dow Chemical Co., Midland, Mich 



GrasselliChemical Co., Cleveland, Ohio . . 

 Riches-Piver & Co., New York, N. Y. . . . . 

 Sherwin-Williams Co., Cleveland, Ohio. . . 



Toledo Rex Spray Co., Toledo, Ohio 



Toledo Rex Spray Co., Toledo, Ohio 



Lead Oxid. 

 (PbO) 



Found. 



07 

 /o 



63.96 



65.42 



64.46 



64.83 



63.98 



62.70 



64.56 



64.36 



64.02 



Guar. 



62 

 62 



Arsenic Oxid (As-O^) 



Total. 



Found. 



/o 

 32.15 

 32.80 

 31.05 



30 00 

 32 05 



31 70 

 30.70 

 31 90 

 31 90 



Guar. 



/o 



30 

 30.0 



.30 

 31 

 30 



30 



31 

 31 



Soluble. 



Found. 



0.34 

 0.13 

 0.23 

 46 

 49 

 49 

 0.14 

 0.52 

 00 57 



Guar. 



% 



0.75 

 0.75 



1 00 

 0.75 

 1 00 

 1.00 

 1 00 

 1.00 



CALCIUM ARSENATE. 



Six samples of calcium arsenate and one sample of magnesium arsenate 

 are included in the next table. Three samples, Nos. 484, 802, 805, con- 

 tained less total arsenic oxid than guaranteed and two samples, Nos. 482 

 and 805 contained more soluble arsenic oxid than guaranteed. 



CALCIUM ARSENATE. 



No. 



482 

 806 

 445 

 484 

 419 

 802 

 805 



Manufacturer. 



Corono Chemical Co., Milwaukee ,Wis 



Corona Chemical Co., Milwaukee, Wis 



Detroit White Lead Works, Detroit, Mich 



The Glidden Co., Cleveland, Ohio 



Riches-Piver Co., New York, N. Y 



Toledo Rex.Spray Co., Toledo, Ohio 



Magnesium Arsenate, Dow Chemical Co., Midland, Mich. 



Cuhiiui. 

 Oxid. 



(CaO) 



47.40 

 49.45 

 42.50 

 41.10 

 46.95 

 45.00 



Arsenic Oxid (AsjOs). 



Total. 



Found. Guar 



47.80 

 46.75 

 44.75 

 43.40 

 41.00 

 38.30 

 32.13 



7o 

 42.6 

 42.5 

 41,4 

 46.0 

 40.0 

 41.4 

 33.0 



Soluble. 



Found. Guar. 



1.87 

 0.34 

 0.92 

 0.45 

 0.43 

 0.24 

 1.25 



1.50 



1.50 



4.1 



1.50 



0.4 



1.50 



0.75 



