varnish insulation
21List of Edison patents — Below is a list of Edison patents. Thomas Edison was an inventor who, it is said, accumulated 1500 plus patents worldwide for his inventions. Nearly 1100 of Edison s patents were in the United States, but other patents were approved in countries… …
22Electromagnetic coil — An electromagnetic coil (or simply a coil ) is formed when a conductor (usually a solid copper wire) is wound around a core or form to create an inductor or electromagnet. One loop of wire is usually referred to as a turn , and a coil consists of …
23Hindenburg disaster — Infobox Aircraft accident name = LZ 129 Hindenburg caption = Hindenburg a few seconds after catching fire. date = May 6, 1937 type = Airship fire site = Lakehurst Naval Air Station in Manchester Township, New Jersey coords =… …
24electric motor — motor (def. 4). [1885 90] * * * Introduction any of a class of devices that convert electrical energy to mechanical energy, usually by employing electromagnetic phenomena. Most electric motors develop their mechanical torque by the… …
25mastic — /mas tik/, n. 1. Also called lentisk. a small Mediterranean tree, Pistacia lentiscus, of the cashew family, that is the source of an aromatic resin used in making varnish and adhesives. 2. any of several similar or related trees, as a pepper tree …
26agriculture, origins of — Introduction the active production of useful plants or animals in ecosystems that have been created by people. Agriculture has often been conceptualized narrowly, in terms of specific combinations of activities and organisms wet rice production… …
27photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… …
28liner — A layer of protective material. asbestos l. a layer of asbestos used to line a dental casting ring so that during the heating and expansion of the investment the compression …
29mask — Synonyms and related words: Kaffeeklatsch, aegis, affectation, air, alibi, anaglyph, apology, appearance, apply to, arm guard, aspect, backstop, bal, bal costume, bal masque, ball, barn dance, bas relief, becloud, befog, belie, blanket, blind,… …
30screen — Synonyms and related words: TV, TV set, act drop, advocate, aegis, alibi, analyze, apology, apply to, arabesque, arm, arm guard, armor, art film, asbestos, asbestos board, assort, awning, backdrop, backstop, basketry, basketwork, batten, beach… …
