The expression, fireproof, is a misnomer. There are no materials that are absolutely fireproof, but there are many that, are fire resisting. A material may be ignition-proof but not capable of resisting high temperatures. Some metals will withstand higher temperatures than others. Fire protection is important from the standpoint of hygiene, since it is a factor in preventing loss of life and property. It will also be observed that fire-resisting material and fireproof construction is more sanitary than soft absorbent materials and improper house construction. Three methods are used in reducing the danger from fire: First, by the use of fire-resisting building material; second, by proper fireproof construction; third, by providing ample fire escapes and fire extinguishers. In a fireproof building all inflammable materials are eliminated and such materials as brick, reinforced concrete, stone and burnt terra cotta are used. As has been stated before, these materials are not fireproof but only fire-resisting. They will all be affected by fire if the intensity is great enough. In the construction of fireproof buildings, only fire-resisting materials are used. No wood nor other combustible materials are utilized. All spaces, air wells and air shafts are eliminated as far as possible. The floors are constructed of rolled wrought iron on steel floor beams, or of Portland cement. The roofs are made of burnt terra cotta, rolled wrought iron or cement. The stairways and landings are of brick, stone, cement, iron or steel, all wood being eliminated even for windows and doors. The partitions are constructed of fireproof material such as hollow tile. Every building should be provided with ample fire escapes to furnish plenty of exits in case of fire. This is accomplished by providing wide stairways and by furnishing sufficient fire escapes on the outside of the building. These fire escapes should be constructed of metal or some fire-resisting material. House Plumbing A system of house plumbing consists of pipes carrying the water into the house, the fixtures or receptacles which are used to receive the waste and refuse from the household and the processes that are performed in the house. The latter includes the fixtures of the bathroom—the stool, bath tub, lavatory and foot tub; those of the kitchen such as the sink; those of the laundry; and the system of pipes which carry the refuse from the house into the main sewer.