The well-known functionalist motto "Form follows function" was originated by the late -19th-century architect Louis Sullivan. His approach was adopted and further developed by his student Frank Lloyd Wright and by such noted architects as Ludwig Mies van der Rohe, Walter Gropius, and Le Corbusier. Each has designed buildings of great geometric simplicity that integrate function with appearance.
Usually the area to be fumigated is sealed off and filled with a poisonous substance called a fumigant. The most widely used fumigants are gases, but liquids or solids that readily give off poisonous vapors are also used. Soil may be fumigated with applicators that inject a liquid under the surface. Common fumigants are formaldehyde and cyanide or chlorine compounds.
Many fumigants are explosive, some are harmful to plants, and most are dangerous to inhale or swallow. Fumigants often are most safely handled by trained exterminators.
Fuller's invention of the geodesic dome is sometimes considered the most revolutionary advance in architecture since the creation of the arch. The geodesic dome appears hemispherical but consists of triangular planes that are generally framed with metal pipe and covered with plastic sheeting. Although its light and flexible construction provides for great mobility and economy, i; is also strong and can resist high winds and heavy snow loads. As an enclosure for houses, stadiums, and possibly even entire communities, the geodesic dome can serve as a protection against bad weather and atmospheric impurities.
Fuller achieved his first success in 1927 with his plan for a low-cost prefabricated house that was designed to hang from a central mast. His inventions include a unique three-wheeled automobile, a world map which was the first relatively free of distortion, and a circular aluminum seven-room dwelling, constructed to sell for only $6,400. Fuller also designed buildings for several U.S. exhibitions, including a dome for Canada's Expo 67. He designed weather stations for the armed forces in the Arctic and a greenhouse, in St. Louis, Mo., called the Climatron. His inventions
have been widely exhibited.
What is a depressant?
A depressant is a drug that reduces the activity of various body functions. Some depressants such as anesthetics, sedatives, antiepileptics, narcotics analgesics, and some muscle relaxants, slow nervous and muscular activity by acting on the central nervous system. Tranquilizers are depressants that affect only part of the nervous system. They induce relaxation without causing total depression.