plate bulb (platbulb)

The swollen part on the edge of beams, having a cro -section of mushroom form. The plate bulb of beams should be bent before the angle-irons are riveted to their upper edges, after which it is nece ary to check and adjust the curvature, which alters slightly in the proce of riveting. The arle, Naval Arch., § 310. platecotet, n. A coat of plate-armor. An helmette and a Jacke or plate cote hideth all partes of a manne, sauyng the legges. Udall , tr. of Apophthegms of Erasmus, p. 308. ( Davies .) plate-culture (plātʼkultūr), n . The culture of micro-organisms, especially bacteria, in a thin, uniform layer of gelatin spread upon a gla plate. plated (plā'ted), p . a . 1. Strengthened with plates of metal and defensive armor. And over all the brasen scales was armd, Like plated cote of steele, so couched neare pre which gives impre ion from a platen, in distinction from rotary or cylinder pre es, which give impre ion from a cylinder or a curved surface. platen2 (plat'en), n. [Appar. a reduced form and special use of platinum.] An alloy used in making buttons, composed of eight parts of copper and five parts of zinc. body. Such hats are often made water-proof, and stiffened before the nap is added. plate-holder (plat holder), n. 1. In photog., a movable frame fitted to a camera, used to contain and transport a sensitized plate, which is exposed to the image projected by the lens by withdrawing a slide or shutter after the hold-plate-paper (plāt'pā" pėr), n. 1. Paper to which er is in position in the camera; a dark-slide; a plate-frame. The plate-holders for dry plates are usually made double, for economy of space, and, after exposure of the plate in one side, are reversed in the camera in order to expose the plate in the other side. 2. A pneumatic device for holding a photo graphic plate during development or other manipulation. plate-iron (plat'ī"èrn), n. Iron pre ed into flat plates by being pa ed between cylindrical rollers; rolled iron.-Plate-iron girder. See girder1. plate-key (plāt'kē), n. A flat key notched at the ends or sides, as the key for a Yale lock. plate-layer (plāt'lā"ėr), In rail ., a work man employed to lay down rails and fix them to the sleepers. [Eng.] Sundry new occupations, as those of drivers, stokers, cleaners, plate - layers . H. Spencer , Universal Progre , p. 54. plate-leather (plat'lera"er), n . Chamois leather used for cleaning gold or silver plate, especially when prepared for the purpose, as with rouge-powder, etc., applied to the surface. platelet (plat'let), n. [ wheel. "), n. A machine plate-mail (plāt māl), n. Same as scale - armor . plate-mark (plāt'märk), n . 1. A legal mark or symbol made on certain gold and silver articles for the purpose of indicating their de- a high glo is imparted on both sides by packing each sheet between smooth plates of copper or zine, and subjecting a pile of the sheets so packed to heavy pre ure in a rolling-pre . Supercalendering (which see) has entirely this proce .-2. A heavy, spongy paper used for taking impre ions from engraved plates. - Hard plate-paper, soft plate-paplate-piece (plat'pēs), n. The lower or under half of the fore quarter of beef, used for corning. Also called rattle - ran. See paper . A polishing