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acid afford alum amount apparatus army billets blankets bleaching-powder body bottles bucket Calories camp carried carrier cent cess-pit Chapter chlorine cholera clothing conservancy contents cooking covered cresol Culicinae daily danger de-lousing dealt diarrhoea disease disinfectant disposal division duties effective enteric enteric fever evaporation excreta faeces feet Field Service filter flies fly-proof force fuel funnel gallons grammes heat hospital hydrochloric acid immunity important IMPROVISED inches incinerator indicated infective organisms inoculation iodine kerosene kitchen large numbers larvae latrine layer lice lines manure matter means measures method minutes mosquitoes necessary Notes obtained oviposit personnel potash alum powder practical prevent protected pyrethrum rapidly ration refilled sacking sand sand-flies sanitary officer Sanitary Section sanitation sickness soakage solution staff sterilization sullage supply surface tion trench trench warfare unit urine washed water-bottles weight