INDEX. 



Absorption spectra 114 



Acoustic curves 61 



Air thermometer 144 



Animalcule cage 33 



Biaxial crystals 132 



Bubbles 107 



Calorescence 149 



Camphor on water 47 



Camera obscura 80 



Candle power 13 



' flame, To project . .92,100 



Capillarity 49 



Caustics by reflection 92 



" ' refraction 104 



Chameleon top 143 



Chemical tank 34 



" reactions 157 



Chladni's experiment 62 



Chromatic aberration 104 



Chromatrope 142 



Cloud formation 145 



Cohesion 45 



Cohesion figures 47 



College lantern 41 



Colors of thin films 107 



Concave mirror, To project 



with 63,91 



Convection in water 156 



" "air 98 



Condenser : its use 26 



Convex mirrors 93 



Crov?'s apparatus 77 



Crystalline substances for polar- 



ized light 133 



Darkened room 5 



Diagrams on mica 129 



Piamagnetism 151 



Diffraction 137 



Disks for study of colors . 110, 143 



Dispersion 105 



Distortion 93 



Divisibility of matter 44 



Double refraction 126 



Double salts, Prepared .... 134 



Drummond light 11 



Eidotrope 42 



Electric light 9 



" " To project .... 153 



Engravings, To transfer .... 32 



Etching upon glues 31 



Fluorescence 119 



Focal length of lenses 21 



Focusing 25 



Fountain, Illuminated 96 



Fraunhofer's lines Ill 



Galvanometer 147 



Gases for lime light 11 



Ghost 84 



Glue, Marine 35 



Gramme machine 9 



Gravitation 50 



Heat 144,155 



Heliostat 1 



Ice flowers 52 



Illumination, Intensity of ... 81 



Images formed by lenses . . 100 



Interference 71 



" spectra 118 



Interlacing lines 70 



Kaleidoscope 88 



Kaleidophone 57 



Lanterns 14 



Lenses 19 



Magnifying power ... 33 



Mountings for 23 



Light 80 



Intensity of 13 



Magnesium 10 



Lime 11 



Composition of . 109, 117, 136 



Polarized 127 



Lissajou's experiments .... 69 



Mach's experiment 64 



Magnetism 150 



Magnetic phantom 150 



Manometric flames 62 



Marine glue 35 



Megascope 38 



Melde's experiment 58 



Microscope solar 100 



" attachment .... 49 



Minute substances 133 



Mirage 95 



Monochromatic light . . . 108,122 



Newton's disk 143 



" rings 109 



