Glass compressor 49 Glass-Micrometer for the Eye-piece 73 Glass plates, ground, clear 82 Glass slides 100 Glass slides, hollow 100 Gypsum and Mica plates 99 Greenough Binocular Microscope 69 =H.= Haemacytometer after Thoma 71 Handle for holding lens 67 Hand Microtomes 97 Hand Spectroscope 71 Horizontal Microscope 56 =I.= Illuminating Apparatus 20 Illuminating Lens 100 Immersion Objective 12, 13 Immersion Oil 101 Iris-diaphragm 100 Iris cylinder diaphragm 20 =K.= Knife-carrier 93 Knife-holder 97 Knife after Thoma 96 Knives for Microtomes 96 =L.= Lamp 83 Leather case 103 Lenses: aplanatic 67 binocular 68 for the pocket 68 Lens for Algae Examination 65 Lens-holders 65 Lens for Projection 90 =M.=