Geissler's tubes Glass globe Grenet's pile Hydraulic whirl Incandescent gas lamp on stand with reflector Inclinated plane Induction coil Insulated cylindrical conductor Intermittent fountain Leslie's cube Leslie's differential thermometer

Leyden jar, may be taken to pieces Maelzel's metronome Magneto-electric apparatus Marconi's system of wireless telegraphy Mariner's compass with cardan's suspension Model of rectilinear Vernier Mohr's balance Müller's apparatus for the laws of the reflection Müller's apparatus for the laws of the refraction Newton's disk Nicholson's areometer