EXPERIMENT STATION BULLETINS. 



o79 



LICE POWDERS 



Fifteen samples of lice powder were collected. These were found to be 

 mixtures of two or more of the following materials with an inert ingredi- 

 ent as a base : nicotine, sulfur, naphthaline, pyrethrum. 



No. 



347 



360 



343 

 141 



117 



118 



120 



338 



346 



345 



350 

 Hi) 



358 

 353 

 340 



Manufacturer 



G. E. Conkey & Co., Cleveland, Ohio: 

 "Conkey'a Lice Powder" 



Cyphers Incubator Co., Buffalo, N. Y.: 

 "Cypher's Lice Powder" 



The Feil Mfg. Co., Cleveland, Ohio: 

 "Salvet Lice Powder" 



J. J. Fleck, Tiffin, Ohio: 

 "Fleck's Lice Powder" 



Dr. Hess & Clark, Ashland, Ohio: 

 Dr. Hess' Instant Louse Killer.., 



International Stock Food Co., Minneapolis, Minn. 

 International Louse Killer 



Nicotine 



Found. Guar 



% 

 0.27 



0.61 



Trace 

 01 



Trace 



Jones The Seed Man, Grand Rapids: 

 "Jones Lice Powder" 



0.41 



Dr. Lape Veterinary Co., Adrian: 

 "Dr. Lape's Lice Killer" 



Geo H. Lee Co , Omaha, Neb.: 

 "Lee's Louse Powder" 



Dr. L. D. IvcGear, Medicine Co., St. Louis, Mo.: 

 "Dr. LeGear's Lice Killer" I 0.29 



Pratt Food Co., Chicago, 111.: 



"Pratt's Lice Killer''^ I 0.90 



42 



"Pratt's Lice Killer" . 



Wm. Rust & Sons, New Brunswick. N. J. 

 "Rust's Lice Killing Powder" 



70 



Dr. David Roberts Veterinary Co., Waukesha, Wis.: 

 "Diolice" 0. 14 



Zenner Disinfectant Co., Detroit: 

 "Zenoleum Lice Powder" 



li 1' 



10 



0.50 



0.01 



0.25 



0.24 



0.34 



40 



0.15 



Sulfur. 



Found. 



% 

 16.91 



4.75 

 41.71 



3.75 



8.90 



63.00 



29.85 



0.35 

 26.63 



Guar. 



% 

 15.85 



4.60 



3.00 

 9.00 



30.0 



7.50 

 23 00 

 10 00 



Naph- 

 thalin. 



Present 



Present 

 Present 

 Present 

 Present 



Present 



Present 

 Present 



P.\Te- 

 thrum. 



Present 



Present 



Present 

 Present 



Present 

 Present 



COAL T.VR KITS .VXD DISINKECTAXTS 



""These proparations form emulsions when mixed wiili wiitci- and are gen- 

 erally prepared by luLxiiig together, with gentle heating, a mineral oil 

 containing phenol (crude carbolic acid) and rosin soap oi- a mixture of 

 rosin and vegetable soaps. 



These preparations are used in the west as sheep dips and in some sec- 

 tions as a spray for scale. They are also u.sed more or less extensively as 

 lice killers and as disinfectants. The value of these products for the above 

 purposes is chiefly, though not entirely, due to the amount of plienol pres- 

 ent. A glance at the following table will show how greatly they var^' with 

 7'espect to th(^ amount of ])henol. 



