Temperature

= = Temperature

A clothes washer or washer machine is designed to wash laundry, such as clothing, towels and sheets. The earliest machines were often hand-operated. As electricity was not commonly available until at least 1930. A drawing of an early washing machine appeared in the January 1752 issue of "The Gentlemen's Magazine," a British publication. The first United States Patent titled "Clothes Washing" was granted to Nathaniel Briggs of New Hampshire in 1797.
 * Automatic washing machines **

** Central heating controls **
A central heating system provides warmth to the whole interior of a building (or portion of a building) from one point to multiple rooms. In much of northern Europe and in urban portions of Russia, where people seldom require air conditioning in homes due to the temperate climate, most new housing comes with central heating installed. By the 12th century, Muslim engineers in Syria introduced an improved central heating system.

A greenhouse is a structure with a glass or plastic roof and frequently glass or plastic walls; it heats up because incoming solar radiation from the sun warms plants, soil, and other things inside the building faster than heat can escape the structure. Air warmed by the heat from hot interior surfaces is retained in the building by the roof and wall. These structures range in size from small sheds to very large buildings.
 * Green houses **