point-contact photocell
11Infinite Corridor — See also: Campus of the Massachusetts Institute of Technology The Infinite Corridor The Infinite Corridor[1] is the hallway, 251 metres (825 feet, 0.16 miles) long,[2] …
12thallium — /thal ee euhm/, n. Chem. a soft, malleable, rare, bluish white metallic element: used in the manufacture of alloys and, in the form of its salts, in rodenticides. Symbol: Tl; at. wt.: 204.37; at. no.: 81; sp. gr.: 11.85 at 20°C. [1860 65; < NL,… …
13X10 (industry standard) — X10 is an international and open industry standard for communication among electronic devices used for home automation, also known as domotics . It primarily uses power line wiring for signaling and control, where the signals involve brief radio… …
14selenium — /si lee nee euhm/, n. Chem. a nonmetallic element chemically resembling sulfur and tellurium, occurring in several allotropic forms, as crystalline and amorphous, and having an electrical resistance that varies under the influence of light.… …
15Thallium — (pronEng|ˈθæliəm) is a chemical element with the symbol Tl and atomic number 81. [ [http://periodic.lanl.gov/elements/81.html thallium ] , Los Alamos National Laboratory. Retrieved November 21, 2006.] This soft gray malleable poor metal resembles …
16Gas lighting — For other uses, see Gaslight (disambiguation). Gas lighting is production of artificial light from combustion of a gaseous fuel, including hydrogen, methane, carbon monoxide, propane, butane, acetylene, ethylene, or natural gas. Before… …
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