Laureling to Leadilngedge

Laureling to Lazy tongs

basement for disposal of laundry.
Laureling. (Furn.) A decorative fea­ture using the laurel~leaf motif.
Lava. (Chern.) The material, fine or coarse, fluid or solid, ejected by a volcano. Pumice is a form of lava. Lavalier Microphone. See "Micro­phone, Lavalier".
Lavatory. (Arch.) A washroom. Lawn. (Pot.) A fine-mesh gauze used as sieve for clay.
Laws of thermodynamics. Any of three principles variously stated in equivalent forms, being the principle that the change of energy of a ther­modynamic system is equal to the heat transferred minus the work dOne (first law of thermodynamics), the principle that no cyclic process is possible in which heat is absorbed from a reservoir at a single tempera­ture and converted completely into mechanical work (second law of th7rmodynamics), and the principle that it is impossible to reduce the temperature of a system to absolute zero in a finite number of operations (third law of thermodynamics).
(,ayering. Another term for over-dub­bing or even more inaccurately, bouncing.
Layer-to-Iayer adhesion. The un­wanted property of some magnetic tape wherein one layer when held in close proximity to an adjacent layer exhibits an adhesive nature an bonds itself to the adjacent layer so. that free and smooth separation of
layers is difficult. Accelerated age­ing at elevated temperatures and humidities tends to emphasise layer­ to-layer adhesion.
Layer-to-Iayer Signal Transfer. Print through, a phenomenon whereby a replica of a recorded signal is permanently transferred from one layer to the adjacent layer to tape. High temperature, long contact periods, thin base films, and high winding tension increase this effect. The "print-through" signal is much lower in amplitude than the original signal.
Laying out. (Shopwk.) The setting off or marking out of work to full .. size.
Lay of the case. (Print.) The scheme or arrangement of the characters in a type case. .
Layout. (Print. Com. Art) A working plan or diagram of a job. (Shopwk.) Planning, or marking out to full size, the development or pattern for shop-work. Usually the layout is on the material from which the piece of work is to be constructed.
Layout bench or table. (Mach.) A bench with a level metal, top on which work can be laid out.
Layout man. (Print.) A man whose duty is to prepare layouts. Some­times called a "typotect."
Layout paper. (Print.) Paper having pica squares ruled on it to serve as guides. Used in laying out adver­tisements and other printing jobs.
Lay-up. (Plast.) In the plastic lami­nating procedure, the result of lay­ing the reinforcing materials into
ttie mold, or over the mold, by hand. The completed lay-up.
Lazy tongs. A system of crossed

LCD to Leadilng edge

jointed bars used for picking up articles not within easy reach.
LCD. Liquid Crystal Display. An elec­tronically driven display with black characters or graphic elements on a light background. LCD displays depend on ambient light rather than generating light of their own, so they use very little power compared to LED (Light Emitting Diod~) dis­plays. The principle is based on a special crystal which changes its light polarisation axis when a volt­ag~ is supplied, thereby blocking the light and creating a black ar~a.
Leach. (Plast.) To dissolve a substance out of another by percolation.
Leaching cesspoQI. (Plumb.) A cess­ pool .that is not watertight.
Lead. (Elec.) (I) An electrical con­ductor which projects from an elec­trical device and to which an elec­trical connection is made. (2) To be in advance. One sine curve leads another when its minimum and maximum points are reached ahead of the same points on the other curve. (Mach.) The distance a screw advances when given a single com­plete turn. In a single thread the lead is equal to the pitch; in a multiple-thread screw the lead equals the multiple times the pitch; that is, in a triple thread the lead is three times the pitch.
Lead. (Min.) A blue-gray metal, quite soft, ductile, and malleable. Specific gravity I 1.34; melting point 327 deg. C. Soluble in nitric acid.. Usually found as an ore in combination with sulphur, as lead sulphide or galena. Pure and in compounds, it has a variety. of practical uses.
Lead burning. (Auto.) Another name for lead welding. Important for work on storage batteries.
Lead cutter. (Print.) A hand-oper­ated device for cutting leads to size.
Leaded matter. (Print.) Type with leads between the lines.
Leader. (Tel.) Blank film used on either end of subject film for thread­ing projector.
Leaders. (Print.) Type characters in multiples of em sizes used for print­ing dotted or intermittent lines.
Lead hammer. (Mach.) A hammer with a head made of lead; used in place of a steel hammer to avoid.
bruising of parts. (Mech.) A ham­mer made of lead and sometimes used for the same purpose as a copper hari1lner, i.e., for hammer­ing against harder metal which would be bruised if a steel hammer were used.
Lead hole. (Mach.) A hole drilled in a piece of metal to facilitate the drilling of a larger hole, or to assist in centering a drill upon an inclined surface.
Leading. (Print.) Placing the re­quired number cif leads in a piece of composition.
Leading current. (Elec.) An alter­nating current reaching its mini­mum and maximum values in ad­vance of the electromotive force causing the current.
Leading edge. (Aero.) The forward propeller blade edge. The leading edge also is called the "entering edge."