44 NEW YORK STATE MUSEUM 



not irritate the skin as when the crystalline flowers of sulphur are 

 used, and appears very effective. Sulphur ointments are uncom- 

 fortable, soil the clothes, and do not act within the clothes in 

 which the lice hide. The effect of this treatment lasts about a 

 fortnight in the case of individuals who perspire freely, and for 

 others about a month. 25 



Birch tar, crude rectified black or white, will keep away lice from 

 10 to 15 days, though it discolors linen somewhat. 20 



An alcoholic solution of oil of bergamot 10 to 15 per cent, may 

 be rubbed into the clothing, or a small bag full of cotton wool 

 soaked in this liquid may be worn around the neck.- 7 



The following are considered among the best vermicides : ( I ) 35 

 per cent cresol and 65 per cent naphtha soap; (2) 35 per cent 

 xylol and 65 per cent naphtha soap; (3) 5 per cent turpentine, 

 5 per cent petrol (gasoline), 2 per cent oil of cinnamon and 88 

 per cent talc. 



The first is especially useful since it not only rapidly kills, but 

 keeps lice away for several weeks. 28 



The liquid of Malinin, consisting of 1000 grams of Persian insect 

 powder extracted with 2700 grams of Russian turpentine for 

 5 days; the residue is pressed out and extracted again with 2700 

 grams of kerosene, after which both extracts are mixed and 250 

 grams of pure carbolic acid and 75 grams of oil of cloves added. 29 

 This may be sprayed upon infested men, their clothing, bedding etc. 

 without injury, and is very effective in destroying lice and other 

 insect pests. 



Infested parts of the body may be rubbed with camphorated oil 

 10 per cent, oil of turpentine 15 per cent, camphorated spirit 10 per 

 cent, chloroform water 5 per 1000, a mixture of equal parts of oil 

 and petrol, xylol 90 drops mixed with 30 grams of vaseline, or a 

 solution composed of 5 cubic centimeters anisol, 90 per cent alcohol 

 50 cubic centimeters and water 45 cubic centimeters. 30 



Eucalyptus oil appears to kill the lice but does not destroy the 

 eggs. It is more powerful though similar in action to camphorated 

 oil. One-half an ounce is sufficient for 2 square feet of material 

 if dropped on one side only. 31 



25 Eysell. Arch. f. Schifs. u. Trop. Hyg., 19:238-40. 1915. 

 20 Englehardt. Rev. Appl. Ent., 4 150. 1916. 



27 Galewsky. Deutsch. Med. Wochenschr., p. 285. 1915. 



28 Soulima & Ebert. C. R. Soc. Biol., 78:340. 1915. 



29 Tarassevitch. Nature (Moscow), 3:1514-18. 1914. 



30 Renault. Paris Med., S:2o6-i2. 191 s. 



3l Sergent & Foley. Bui. Soc. Path. Exot, 8:378-81. 1915. 



