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  • machine sewing

    Sewing by machine, as distinct from sewing by hand.

  • magazine camera

    A large box camera that which allowed a series of prints to made on plates or film without reloading

  • magic bullet

    A remedy (drug or therapy or preventive) that cures or prevents a disease or number of diseases.

  • magic lantern

    Box-like device containing illuminating lamp with condensing mirror or lens and other lens to project lantern slides on a screen or wall. Used for public recreation or private entertainment.

  • MAG-LEV railway

    A magnetic levitational transit system.

  • magnetic compass

    A navigational instrument for determining direction relative to the earth's magnetic poles. It consists of a magnetized pointer free to align itself with Earth's magnetic field. Directions are indicated by either a fixed or rotating scale, usually marked both in degress and the cardinal points (North-South-East-West)

  • magnetometers

    Instruments for measuring the magnitude and sometimes the direction of a magnetic field, especially that of the earth.

  • magnification

    The process of enlarging something in appearance, not in physical size.

  • magnifying glass

    Hand-held, simple or compound magnifying lens with low powers (x3-20) used to closely examine small objects

  • mail van

    A vehicle designed specifically for the collection, sorting, conveyance and discharge of mail

  • malaria

    Parasitic disease transmitted by certain kinds of mosquito. Malaria is characterized by fever and enlargement of the spleen. Each year, there are approximately 515 million cases of malaria, killing between one and three million people.

  • mallet - tool

    Hammering tool with a head and handle, usually of wood but sometimes of other materials, smaller than a maul or beetle and usually with a relatively large head, often used to drive another tool, such as a chisel or a gouge.

  • mandrake root

    The root of any plant in the Mandragora family. The resemblance of the root to a human led to a superstition that when pulled from the ground, the root would produce a shriek that would kill anyone who heard it.

  • mania

    A category of mental illness from the Middle Ages to the 1800s. Those with mania experienced uncontrollability, euphoric highs and bouts of excessive energy.

  • manikin

    Models of the human body used for teaching anatomy or demonstrating surgical operations.

  • manual - instructional material

    Portable books, treatises, or compendiums, covering one or more subjects, arranged for quick location of information and of a size such as may conveniently be held in the hand. Examples are instructional manuals and guides to museums' collections.

  • manuscript - document genre

    Handwritten documents, particularly books and other documents created before the invention of the printing press. May also be used to distinguish certain documents from published or otherwise printed documents, as in the cases of typed personal letters or a typescript from which printed versions are made.

  • map

    A document, poster or sign showing stations, routes and locations served in cartographic form.

  • mariner's astrolabe

    Mariner's astrolabe, also called sea astrolabe, is not an astrolabe proper, but rather a graduated circle with an alidade used to measure vertical angles. Used to measure the altitude of the pole star or that of the sun at noon to determine latitude at sea.

  • mariner's compass

    Navigational magnetic compass usually consisting of a pivoted compass card & magnet needle and with 8, 16, or 32 equal divisions, set in a gimbal-mounted nonferrous metal bowl.

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