Mitrography to Mold
running at a right angle. A miter gear.
Mitography. (Print.) The art of silk screen process printing. .
Mixture. (Chern.) A combination of two or more substances chemically united with each other.
M.M.F. (Elec.) Magnetomotive force, or magnetic motive force.
Modeling. (Plaster) Forming to a desired shape by smoothing the surface.
Mock up. (Aero.) A mechanical object or device used as an aid in teaching. (Com. Art.) A scale model for testing or displaying a design.
Moderator. Material used to slow down the fast neutrons created in a fission process to the lowe velocities appropriate to the type of reactor in use by scattering without appreciable capture.
Modem. (Print.) A Roman type having sharper hair lines and longer serifs than the old style.
Modification. The state of being changed partially.
Modulation. To cause the amplitude, frequency, phase or intensity of a carrier wave to vary in accordance with a sound wave or some other signal.
Modulate. (Radio.) The change produced in the carrier wave of a radio transmitter, usually caused by combining it with an A.p. (audio fre quency) wave.
Module. (Arch.) A measure for standardizing the planning. o~ buildings and the measurements of building materials.
Modulus. A number, coefficient, or quantity which measures a force, function, or effect.
Modulus of elasticity. The ratio of stress per unit area to corresponding strain per unit length, the distortion of strain being within the elastic limit.
Modulus of rigidity. (Engin.) Shearing stress divided by shearing strain.
Mogul. (Elec.) A socket or receptacle used with large incandescent lamps of 300 watts or over.
Mohair. (Furn.) A fabric made of the hair of Angora goats; also an imitation of such fabric. Mobs' scale. A numerical grading of hardness of minerals. SEE HARD NESS.
Moisture content. (Papermkg. and Print.) The amount of moisture content in finished paper.
Molar solution. (Chem.) One which contains the molecular weight of a solute expressed in grams, per 1000 C.c.
Mold. (Fdry.) (n) That in which a shape is reproduced, as the form in which a casting is made. (Plast.) In plastics, the receptacle, usually metal, into whose cavities plastic is shaped, either by chemical reaction alone or by heat, pressure, and the reaction. Other materials used as molds for plastics are, the resin itself, glass ceramic, latex, and plastisol. The last two materials are Mold board to Momellt of a couple
flexible. (Print.) That part of a casting machine in which the body of the type is cast:
Moldboard. (Wood Patrnkg.) The board on which the pattern is placed preliminary to ramming up the mold. (Agrie.) The steel plate above the share of a plow, shaped so that the soil lifted by the share will be turned over before it falls into the furrow. Molded-intake belt course. (Bldg.) Usually an elaboration of a plain band course of masonry or cut-stone work placed at a point where the thickness of the upper wall IS less than that of the wall below it.
Molded plastics. (Plast. Art.) Articles such as small clock cases, toilet goods, brush backs, mirror frames, etc., made from molding powder in dies under heavy pressure.
Molder's rammer. (Fdry.) A wooden tool, cylindrical at one end and wedge shaped at the other; used by fOlmders in "ramming up" molds.
Molding. (Arch.) An orname~tal strip used in the finishing of buildings. Moldings are of many shapes and sizes. (Fdry.) The act of making a casting by means of a pattern from which a mold is made.
Molding board. (Plat it. ) Pressed sheets, mixed fibers and resins, used to reinforce molded articles.
Molding plane. (Furn.) Small plane for cutting moldings.
Molding powder. (Plast.) Uncured plastic granules, compounded with fillers, pigments, plasticizers, etc., prepared for use in compression, injection and extrusion machines, where pressure and heat cause chemical changes that result in hardened products.
Mold release. (Plast.) See Parting agent.
Molding sand. (Fdry.) Foundry sand used in the making of molds.
Mole. (Chern.) (Gram molecular weight) The molecular weight expressed in grams.
Molecular theory. (Chern. Phys.) The theory that matter is made up of minute particles called "molccules". and M1at each molecule has the same properties as has the mass as a whole. .
Molecule. (Chern. and Phys.) The smallest part of any subtance that can exist separately and still retain its properites and composition.
Molybdenite. A greasy graphite-like ore of the metal molybdenum occuring in granite, gneiss, and limestone.
Molybdenum. (Metal.) A silverywhite metal used to produce an alloy of steei suitable for the manufature of high-speed. cutting tools. Also used in cast alloys.
Moment. (Engin.) The product of a force, and the perpendicular of its line of action from the point on which it acts.
Moment of a couple. (Math.) The
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