Magdeburg hemispheres Magnetic coil Magnetic field of a circular current Magnetic field of a solenoid Magnets Manometric capsule Mariner's compass with Cardan's suspension Marconi's system of wireless telegraphy Mascart's insulator Maxwell's pendulum Melloni's bench for the radiant heat Microphone for radio communication Micrometer Micrometric slit

Model of alternator Model of calliper Model of the eye Model of thermo-motor Model of screw and nut Models of polyphase motors Models of rotors Morse stations Mousson's recongelation apparatus Needle capacity apparatus Newton's coloured rings Newton's disk Oersted's experiment Optical bench for showing the teory of telescopes