ENTOMOLOGY

S18SANITARY ENTOMOLOGYsterilization of clothes, little numbered tags, canvas folding tanks forwater, kerosene lamps to be used at night, and a barber shop. Naphthasoap is used as the cleansing agent. On the Mexican border at EI Paso themen are first sprayed with gasoline soap (for which kerosene soap shouldbe substituted) and then walk through a continuous spra.y in a tank ofwater about a foot deep. On the Sante Fe Railroad, according to Boyd,the Mexicans are given a ten-minute bath in kerosene and soap-suds(equal parts), with a kerosene and vinegar bath for the hair. Our ownarmy has now established elaborate bath and disinfection houses.In at least one of the baths hot water should be used. The liquidsoap described above, applied as a spray, is a very good method andprevents contamination by means of the soap.Either before or after the bath, they enter the barber shop, wherethe hair is clipped if there is any evidence of head lice. Bags should betied around the neck to catch the hair, which is burned. The men ma.yalso be shaved.They then pass into the dressing room where they receive cleanunderclothes and their outer garments and other possessions disinfectedand disinsected.Soaps.-In the bath, soap is one of the essentials. All soaps are notinsecticidal, and others are not sufficiently effective. Recent tests haveshown that gasoline and gasoline soap emulsion are not thoroughly effectiveremedies (Hutchison and Pierce). The following soap formulae areconsidered effective:1. Liquid kerosene soap emulsion made by boiling one part soapchips in four parts water and then adding two parts kerosene oil. Thisjellies when cold, and one part of this jelly added to fou_r parts of warmwater makes a good liquid soap at very small cost.!i!. Five per cent carbolic acid and soft soap, equal parts.S. 5 per cent cresol and soft soap, equal parts.4. Two per cent lys01 and soft soap, equal parts.For wounded men, after a shower, Adler-Herzmark recommends soapingdown with a brush, using an emulsion of petroleum 1 part, soft soap!i! parts, and lysol solution 1 part. Afterwards apply'S per cent cresolointment to the hairy parts .. Sponge Baths.-It is often impossible for soldiers, especially, to geta genuine bath, so they must resort to sponge baths and treatment ofthe body and garments to reduce, at least, the infestation.A good treatment consists of sponging off the body with water, usingthe above-mentioned kerosene emulsion soap, or sponging with !i! per centcrude carbolic acid solution, and then anointing the body with ordh."'\arygrease or with vermijelly, which we have already described.'........__Ver11iicmes and Repcllents.-Whell unable to follow out the plan of