MacAdam;MacAdam, John: 1756 to 1836, road builder Machine tools;Machine tools are employed to shape, cut and process workpieces. MacMillan;MacMillan, Edwin Mathisson: (* 1907), physicist Maddox;Maddox, Richard Leach: 1816 to 1902, physician and photochemist Madersperger;Madersperger, Joseph: 1768 to 1850, engineer Magirius;Magirius, Dietrich Conrad: 1824 to 1895, engineer Magnetic heads;Coil used in audio or videotape recorders. It converts information into electric signals and transfers them on a magnetic tape or floppy disk or reconverts the information stored on magnetized tapes. Magnetic sound reproduction;Sound recording method in which sound waves are converted into electrical signals and amplified in a recording system with electromagnetic recording heads. Magnetic tape;A magnetic tape is a data carrier for sound, video and other media. It consists of a plastic tape coated with a magnetizable layer. Data is stored on this layer in the form of minute magnetic strokes. Magnus;Magnus, Heinrich Gustav: 1802 to 1870, physicist Maiman;Maiman, Theodore Herold: (* 1927), physicist Mallet;Mallet, Anton: 1837 to 1919, engineer Malus;Malus, Etienne-Louis: 1755 to 1812, army officer and physicist Mälzel;Mälzel, Johann Nepomuk: 1772 to 1838, musical instrument maker Mandelstam;Mandelstam, Leonid Isaakovich: 1879 to 1944, physicist Mannesmann;Mannesmann, Reinhard: 1856 to 1922, engineer Mannoury;Mannoury, Jean Charles Alexandre François: 1777 to 1822, engineer Marconi ;Marconi, Guglielmo Marchese (1874-1937), Italian radio engineer and Nobel prize winner for physics in 1909 (along with Karl Ferdinand Braun) Marcus;Marcus, Siegfried: 1831 to 1898, automotive engineer Marinoni;Marinoni, Hippolyte: 1823 to 1904, engineer Mariotte;Mariotte, Edmé: 1620 to 1684, physicist Markgraf;Markgraf, Andreas Siegismund: 1709 to 1782, chemist Martens;Martens, Adolf: 1850 to 1914, metallurgist Martin;Martin, Pierre: 1824 to 1915, French engineer Mass;The quantity of matter contained in an object. The strength of a gravitational field is directly proportional to its mass. Mattauch;Mattauch, Joseph Heinrich: 1895 to 1976, physicist Matter;The substance of the universe consisting of atomic particles, atoms and molecules. Maudslay;Maudslay, Henry: 1771 to 1831, machine manufacturer Mauersberger;Mauersberger Heinrich: 1909 to 1982, machine manufacturer Maupertius;Maupertius, Pierre-Louis: 1698 to 1759, physicist and mathematician Maurer;Maurer, Eduard: 1886 to 1969, physical chemist and metallurgist Maxim;Maxim, Sir Hiram Stevens: 1840 to 1916, engineer Maxwell;Maxwell, James Clerk: 1831 to 1879, physicist Maybach;Maybach, Wilhelm (1846-1929), German engineer and inventor Mayer;Mayer, Julius Robert: 1814 to 1878, physician and physicist McCormick;McCormick, Cyrus Hall: 1809 to 1898, farming machinery inventor Mechanics;Study of motion affected by forces and stasis (effect and equilibrium of the forces exerted on a stationary object). Meikle;Meikle, Andrew: 1719 to 1811, engineer Meisenbach;Meisenbach, Georg: 1814 to 1912, copperplate engraver and engineer Meissner;Meissner, Alexander: 1883 to 1958, physicist Meitner;Meitner, Lise (1878-1968), Austrian-Swedish physicist Melan;Melan, Ernst: 1890 to 1963, civil engineer Melloni;Melloni, Macedonio: 1798 to 1854, physicist Mendeleyev;Mendeleyev, Dmitry Ivanovich: 1883 to 1907, chemist Mercator;Mercator (real name Gerard de Cremer): 1512 to 1594, mathematician and geographer Mergenthaler;Mergenthaler, Ottmar: 1854 to 1899, engineer Mersenne;Mersenne, Marin: 1588 to 1648, naturalist Messter;Messter, Oskar: 1866 to 1943, cinematographer Meyer J.;Meyer, Jean Jacques: 1804 to 1877, machine manufacturer Meyer L.;Meyer, Lothar: 1830 to 1895, chemist Meyer V.;Meyer, Viktor: 1848 to 1897, chemist Michelson;Michelson, Albert Abraham: 1852 to 1931, physicist Micrometer screws;A micrometer screw is a precision instrument used to measure short distances to an accuracy of 0.00254 millimeters. Mikoyan;Mikoyan, Artem Ivanovich: 1905 to 1970, aircarft designer Miller O.;Miller, Oskar von: 1855 to 1934, engineer Miller P.;Miller, Patrick: 1731 to 1815, engineer Millikan;Millikan, Robert Andrews: 1868 to 1953, physicist Mitscherlich;Mitscherlich, Alexander: 1836 to 1918, chemist Mitscherlich;Mitscherlich, Eilhard: 1794 to 1863, chemist, father of Alexander M. Mittasch;Mittasch, Alwin: 1869 to 1953, chemist Mitterhofer;Mitterhofer, Peter: 1822 to 1893, engineer Mohr;Mohr, Christian Otto: 1853 to 1911, building engineer Mohs;Mohs, Friedrich: 1773 to 1839, physicist Moissan;Moissan, Henri: 1852 to 1907, chemist Molecule;Two or more chemically combined atoms. A water molecule consists of two hydrogen atoms and one oxygen atom. Moncel;Moncel, Théodor du: 1821 to 1884, electrical engineer Monge;Monge, Gaspard: 1746 to 1818, mathematician and physicist Monier;Monier, Joseph: 1823 to 1906, gardener Montgolfier;Etienne Jacques (1745-1799) and Michel Joseph (1740-1810) de Montgolfier invented the hot-air balloon. Morin;Morin, Arthur: 1795 to 1880, physicist Morse;Morse, Samuel Finley Breese (1791-1872), American painter and inventor Moseley;Moseley, Henry Georges Jeffreys: 1887 to 1915, physicist Moshaiski;Moshaiski, Alexander Fyodorovich: 1825 to 1890, engineer Mößbauer;Mößbauer, Rudolf: (* 1929), physicist Motherboard;Thin copper or silver-coated plate on a computer, on which microprocessors, memory chips and electronic components are mounted. Motor;A motor is a machine that produces motion by harnessing electricity or other forms of energy. Motors powered by chemical energy are usually called engines. However, a motor may also mean a motor vehicle with an internal combustion engine. Moyer;Moyer, Andrew: 1899 to 1959, biologist Moyroud;Moyroud, Louis Marius: (* 1914), engineer Mrowka;Mrowka, Bernhard: 1907 to 1973, physicist Müller;Müller, Otto: 1828 to 1897, engineer Müller;Müller, Erwin Wilhelm (1911-1977), German physicist Murdock;Murdock, William: 1754 to 1839, engineer Murgue;Murgue, Daniel: 1840 to 1918, engineer Musschenbroek;Musschenbroek, Pieter van: 1692 to 1761, physicist Nasmyth;Nasmyth, James: 1808 to 1890, machine manufacturer Natterer;Natterer, Johann August: 1821 to 1901, physician and naturalist Navier;Navier, Claude Louis Marie Henri: 1785 to 1836, mathematician Navigation;Guiding of a vehicle from a starting point to a destination including all calculations needed to establish the current location. Nernst;Nernst, Walther Hermann: 1864 to 1941, chemist Nervi;Nervi, Pier Luigi: 1891 to 1979, engineer Nessler;Nessler, Julius: 1827 to 1905, chemist Neumann;Neumann, Franz Ernst: 1798 to 1895, physicist and mineralogist Neumann;Neumann, John von: 1903 to 1957, mathematician Neutrino;Elementary particle released in nuclear fusion. Neutron;An electrically neutral elementary particle that has a slightly larger mass than a proton. Newcomen;Newcomen, Thomas (1669-1729), English steam engine manufacturer Newton;Newton, Sir Isaac (1643-1727), English physicist, astronomer, mathematician, chemist and naturalist Nicholsons;Nicholsons, William: 1754 to 1815, scholar Niepce;Niepce, Claude-Félix-Abel: 1805 to 1870, photographic inventor Niepce;Niepce, Joseph-Nicéphore: 1765 to 1833, photographic inventor and brother of Claude N. Nipkow;Nipkow, Paul: 1860 to 1940, engineer Nobel;Nobel, Alfred: 1833 to 1896, chemist, founder of the Nobel prize named after him Nollet;Nollet, Jean Antoine: 1700 to 1770, clergyman and naturalist Nordenfelt;Nordenfelt, Torsten Wilhelm: 1842 to 1920, engineer Noyce;Noyce, Robert N.: 1927 to 1990, physicist Nuclear fusion;Nuclei of lighter atoms fuse to heavier nuclei releasing great amounts of energy in the process.