In the so-called “Egyptian Sanitary Self-cooling Water Bag” water is kept cool by the principle of refrigeration by evaporation. A small amount of water exuded by the bag evaporates slowly and keeps the contents cool. Colder water can be obtained by exposing the bag to the air on all sides, as when hung up.
Waterproof folding basins come in weight of seven ounces to fold in one-half inch thickness. One such basin costing sixty-five cents is made of brown waterproof duck; capacity, 1 gallon; diameter, 12 inches; height, 3 inches.
It is bound with linen braid and has a wire rim. A canvas folding bucket which costs ninety-five cents is made of the same material in the same way and with a stout rope handle, with a capacity of three gallons. The diameter of this is 9 inches; the height 12 inches, and the weight 8 ounces.
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.
Water Supply Generally Available
Everywhere, save in the eastern states and unpopulated parts of the west, the motor camper will find municipal camp sites in nearly all the towns and cities or in their close vicinity. These for the most part are supplied with public water of good quality. In most of them the motorist will also find electricity for light, and in many places gas for cooking. In others he will find fireplaces and fuel for his use. If the motor camper plans to use these public facilities, so numerously supplied, he will not have to depend upon his own resources for the same and so may correspondingly limit his camping equipment.