DEPARTMENT REPORTS. 



223 



PYRETHRUM POWDERS. 



Of the four samples examined pyrethrum was found to be the active 

 ingredient. This is a well knoAvn and effective insect powder but it 

 loses its strength rapidly on expo.sure to the air, consequently it should 

 always be kept in air-tight receptacles. 



No. 



278 

 298 

 291 

 300 



Name of sample and manufacturer. 



Black Flag Insect Powder, Langdon & Co.,'Baltimore,'Md 



"El Vampiro" Allair Woodward k Cc, Peoria. 111. 



Shure Shot Roach Powder, American Druggist Syndicate. New York. 

 Elkay's Ant, Bug and Roach Powder, United Drug Co., Boston 



Contains pyrethrum as active ingredient. 

 Contains pjTsthrum as active ingredient. 

 Contains pyrethrum as active ingredient. 

 Contains pyrethrum as active ingredient. 



MISCELLANEOUS MATERIALS. 



299. Peterman's Ant Food. Manufactured by Wm. Peterman, New 

 York City. Guaranteed to contain 65-75% sodium fluorid. Found, 

 sodium fluorid 68.87%, sugar, and other substances to act as bait. 



295. Powdered Hellebore. Manufactured by Jas. A. Blanchard, New 

 York City. Moisture 10.49%. Ash 10.86%. All tests show the sample 

 to be pure hellebore. 



306. Arsite. Manufactured by Morris Herrmann & Co., New York 

 City. Guaranteed to contain total arsenic (expressed as metallic 

 arsenic) 28.8%. Soluble arsenic 28.8%. Found total arsenic (express- 

 ed as metallic arsenic) 30.15%. Completely soluble. Sample is a solu- 

 tion of ordinary white arsenic. 



305. Calite. Manufactured by Morris Herrmann & Co., New York 

 City. Guaranteed to contain water 66%. Total arsenic (expressed as 

 metallic arsenic) 11.4%. Arsenic in water soluble forms i/^ to 1%. 

 Found, water 66.27%. Total arsenic (expressed as metallic arsenic) 

 12.70%. Soluble arsenic (expressed as metallic arsenic) 0.30%. Sample 

 is calcium arsenate paste. 



292. London Purple. Manufactured by Hemniiugway's London Pur- 

 ple Co., New York City. Guaranteed to contain total arsenic (expressed 

 as metallic arsenic) 21%, water soluble arsenic 3%. Found, total arse- 

 nic (expressed as metallic arsenic) 15..^)59^, arsenic in water soluble 

 form 3.17%. Sample is composed of calcium arseuite 30.48% and cal- 

 cium arsenate 7.67%. 



