Filters
An excellent thing to take along for safety’s sake as a protection from contaminated water is the Army Filter Pump known the world over. This weighs three pounds and has a capacity of a quart a minute. [[73]]The filter consists of a brass case nickel plated, containing and protecting a cylinder made of infusorial earth. This must be put in water and, by a pump attached at the side, water is forced through the filtering cylinder out through a goose neck tube at the top. The filtering cylinder should occasionally be removed and washed off with a cloth or soft brush.