56 



INSECTICIDES AND FUNGICIDES. 



The sample does not mix or form an emulsion with water. It is 

 undoubtedly a sample of a coal-tar product, probably cresote oil. 

 This oil is undoubtedly of value as'a louse killer and a disinfectant. 



LEGGETT'S KILLER. 



[Serial No. 19686.] 

 Results of distillation test. 



Per cent. 



164-166 C 32 



166-168 C 28 



168-172C.. . 19 



Per cent. 



172-200 C 12 



200-220 C 3 



Remaining in' flask and loss 6 



The sample, including every fraction, has a strong odor of turpen- 

 tine. In a 200 mm. tube it gives a +67 reading on the Schmidt and 

 Haensch polariscope sugar scale. It also mixes entirely with glacial 

 acetic acid. 



Thorp's Dictionary of Applied Chemistry says oil of turpentine 

 usually sold in the American trade begins to boil about 160 C. and 

 distills over, leaving only a slight residue above 180. It also mixes 

 with glacial acetic acid. 



This sample appears to be composed of American oil of turpentine. 

 It is of value for the purposes intended, but 25 cents per can is a very 

 high price. 



SURE DEATH TO INSECTS. 



[Serial No. 4, I. & W.] 

 Results of distillation test. 



40-60 C . 

 60-80 C . 

 80-110 C 



Per cent. 



24 



41 



. 26 



110-140 C 6 



Remaining in flask and loss . 3 



Light oils with odor of lower 

 boiling fractions of petro- 

 leum. 



A pleasant etherial odor, as 

 though some substance re- 

 sembling oil of citronella 

 were present. 



This sample has a strong odor of gasoline. It appears to consist of 

 the lower boiling products of petroleum, commonly grouped together 

 as gasoline, and perhaps a small quantity of some high-smelling oil 

 with an odor resembling that of oil of citronella. Gasoline is known 

 to be a good remedy in getting rid of bedbugs and other vermin, but 

 25 cents per can is an exorbitant price. The indiscriminate use of 

 gasoline is very dangerous by reason of its extreme volatility and easy 

 ignition. 



