MISCELLANEOUS LIQUID INSECTICIDES. 57 



DR. HAKKK'S i.i<jrn> DKATII DROPS. 



[Serial No. 5, I. & W.] 

 Results of distill it n>i i ft -*/. 



Per cent. 



40-70 C 20 



70-100 C 42 



100-130 C . . .24 



Per cent. 



130-150 C 5 



150-168 C 3 



Remaining in flask and loss. (> 



This sample has a strong odor of gasoline, and every fraction has a 

 strong odor of the lower boiling products of petroleum; appears to be 

 composed of the lower boiling products of petroleum, commonly 

 classed as gasoline. There is no indication of any other substance 

 being present. 



HEINE'S LIQUID INSECT DESTROYER AND DISINFECTANT." 



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

 Results of dixf illation test. 



Strong odor of turpentine. 



Per cent. 



160-170C 11 



170-180C 14 



180-190C 15 



190-205 C 18 



205-225 C 14 



225-268 C 19 Thick oil ; pungent burnt odor. 



Remaining in flask and loss 9 



The sample, which has a strong odor of turpentine, is partially sol- 

 uble in glacial acetic acid, and the reading in a 200 mm. tube on the 

 Schmidt and Haensch polariscope scale is +25. It appears to con- 

 sist of a mixture of turpentine with some other oil which, from its 

 boiling points and general properties, appears to be kerosene. Such 

 a mixture is good both as an insect destroyer and to some extent as :i 

 disinfectant, but the price (25 cents) per can is too high. 



THYMO-CRESOL. 



[Serial No. 11, 1 & W.] 

 Results of distillation test. 



85-105 C. A fair-sized fraction comes over, which separates into a layer of water 

 and a layer of oil having the odor of benzene, toluene, etc. 



105-180 C. Practically no liquid comes over, and at the latter temperature a 

 semisolid mass is formed in the retort. 



180-220 C. A small amount of a thick oil having the odor of and giving test for 

 phenol and the cresols. 



220-270 C. Thick oil, with odor and other properties of cresols. 



270-285 C. Thick, heavy oil, with odor and other properties of cresols. 



Left in the retort a solid mass. 



Sodium oxid, 2.20 per cent. 



Sample has a strong odor of coal tar, which is evident!} 7 the basis of 

 the preparation. It appears, from the boiling points and size of the 



See correspondence with manufacturer, page 61. 



