INDEX. 



Absorption spectra 114 



Acoustic curves 61 



Air tiierraometer ....... 144 



Auimalculc cage 33 



Biaxial crystals 132 



Bubbles 107 



Calorescence 149 



Camplior on water 47 



Camera obscura 80 



Candle power 13 



<' tlanie, To project . .92,100 



Capillarity 49 



Caustics by reiiection 92 



" " refraction 104 



Chameleon top 143 



Cberaical tank 34 



'« reactions ...... 157 



Chladni's experiment 62 



Chromatic aberration 104 



Chromatropc 142 



Cloud formation 145 



Cohesion 45 



Cohesion figures 47 



College lantern 41 



Colors of thin films 107 



Concave mirror, To pi'oject 



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 



DiamagnetJsm 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 



Drumtuond light 11 



Eidotropc 42 



Electric lisjht 9 



" " To project .... 153 



Engravings, To transfer .... 32 



Etching upon glass 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 H 



" 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 



Me;;ascope 33 



Meide's experiment 58 



Microscoiic solar lOO 



" attachment .... 49 



Minute substances 133 



Mirage '^5 



Monochromatic light . . . 108, 122 



Newton's disk 143 



" rings 109 



