Magnesti to Manganese bronze
Magnesti to Major
Magnesto (Elec.) A device consisting essentially of permanent magnets and an armature, for generating electricity by electromagnetic induction.
Magnetomotive force. (ELec.) The total magnetizing force integrated over the length of the complete magnetic circuit.
Magnetostrictive. A demagnetising process induced by physical pressure on the particJes such as in a very tightly wound tape pack or pressure caused by impact. Magnetostrictive demagnetisation is confined mainly to higher frequencies.
Magnet steel. Usually a good grade of crucible tungsten steel containing some chromium and manganese. Used for permanent magnets.
Magnet wire. (ELec.) Wire used in winding armatures, field coils, induction coils, etc. It is small, single copper wire, insulated with cotton, silk, or enamel; not impregnated.
Mahlstick. (Paillt.)A stick with a ball at one end, used by painters to steady the hand while using the brush.
Mahogany. (Wood) True mahogany Swietenia Mahogani is considered the premier cabinet wood of the world. It grows in southern Florida, the West Indies, Mexico, Central America, Colombia, Venezuela, and in the Upper Amazon regions. The heartwood is reddish pink, or salmon, or even yellow when fresh, and turns dark red upon exposure to sun. Weight 25 to 53 lb. per cubic foot; density variable. Grain produces highly attractive figures.
Main amplifier (power amplifier). Amplifier unit which produces the output power required for driving speakers.
Main bearings. (Auto.) The main bearings in an automobile engine are those which carry the crank shaft.
Mains. Domestic electrical a.c. power supply. Approximately 240 V at 50 Hz in india, and 120 V at 60 Hz in America.
Main shaft. (Mach.) Is the line of shafting which receives its power directly from the engine or motor and transmits power to other parts.
Main supporting surface. (Aero.) The surface of the wings which makes it possible for an airplane to function. Maintenance. Proper care, repair, and keeping in good order.
Majolica. (Pot.) An earthenware of beautiful luster made by the early Moorish potters, which reached its greatest perfection in Italy in the sixteenth century. It became a lost art, and has been revived witft only moderate success.
Major. G-'at in number, quantity, or extent. Gre.ater in importance. Principal, 'leading. Major axis to Manganese bronze Major axis. The long diameter of ellipse.
Major diameter. (Mach.) Formerly caIled outside diameter. It refers to the largest diameter of a thread on a screw or nut.
Make and break. (Elec.) The term may be applied to several electrical devices, Primarily, there are a pair of contact points, one stationary, and the other operated by a cam which makes the break in a circuit between these points.
Make-ready. (Print.) The operation of making a form ready for printing. It consists of puIling an impression, spotting up, setting guides, etc. Also the paper sheet on which are pasted the overlays for a form.
Make-up. (Print.) To arrange type matter into pages. Make-up rule. (Print.) Steel rule used in making up forms or pages.
Malachite. (Min.) One of the ores of copper. A green, basic, cupric carbonate, usualIy found massive and sometimes as an incrustation; used for ornaments, mosaics, etc. When ground into a powder, it is used as pigment unde_' the name of "mountain green."
Malax. (Wood Fin.) To soften by kneading, rubbing, mixing, or by stirring some thinner substance.
Malleable. Capable of being hammered or rolIed out with out breaking or cracking. See Gold.
Malleable cast iron. (Metal) Cast iron which has been subjected to partial decarburization. Different from ordinary cast iron in that its structure is fibrous instead of granular. It is used to advantage in parts which are subjected to shock.
Malleableizing. (Metal.) A method of annealing white cast iron for the purpose of removing most of the carbon or for changing the carbon to temper carbon. Mallet. A wooden hammer.
Maltose. (Chern.) A crystalline sugar formed from starch in malt, used in breadmaking.
Management. Administration; direction; superintendence; control.
Manchette. (Furn.) A French term meaning the upholstered cushion on the arm of a chair.
Mandrel. (Mach.) A shaft or spindle on which an object may be fixed for rotation; e.g., when a piece is to be turned in a lathe, it may be carried on a "mandrel" which is supported by the lathe centres. The terms mandrel and arbor.are often used interchangeably.
Mandrel stake. (Sheet-Met. Wk.) A long, straight stake having a rounded face for the greater portion of its length, terminating in a short, flat anvil.
Maneuver. (Aero.) (1) To operate an aircraft in a skillfuIl manner, so as to cause it to perform evolutions out of the ordinary. (2) To perform tactical or acrobatic evolutions with aircraft. '
Maneuverability. (Aero.) That quality in an aircraft which permits ease of handling. Manganese bronze. (Metal.) An alloy containing 55-60 per cent copper; 38-42 per cent zinc, and small amounts of tin, manganese,
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