Ice calorimeter Incandescent gas lamp on stand, with reflector Inclined plane Inclined tubes for water and mercury Inclinometer and declinometer Induction coil Ingenhousz. Conductivity box Insulated cylindrical conductor Insulating stand Intermittent fountain Italian cell Joule effect Kirchoff-Bunsen's spectroscope König's sound pipes Kohlrausch's cell Krus' spectroscope Labial-whistle, with slide graduated pusher to produce the sound of the scale

Labial-whistle, with movable membrane to show nodes of vibration Lane's jar Laplace's ice calorimeter Laurent's polarimeter Laurent's polarimeter with basis Leclanché cell Leidenfrost's drops. Calefaction Leslie's apparatus Leslie's cube Leslie's differential thermometer Leyden jar Leyden jar, may be taken to pieces Linear expansion apparatus Locatelli's lamp Lodge touned jars Lummer-Gehrcke's plate