1 86 



Table 1 76. 

 INDEX OF REFRACTION. 



Vailons MonoreMngent or Optically Isotropic Solids. 



Substance. 



Agate (light color) 

 Ammonium chloride . 

 Arsenite .... 

 Barium nitrate . 

 Bell metal 



Blende .... 

 Boric acid . . . 



Borax (vitrified) . . 



Camphor .... 

 Diamond (colorless) . 



Diamond (brown) 

 Ebonite .... 



Fuchsin .... 



Garnet (different varieties) 



Gum arabic 

 (I t( 



Hanyne .... 

 Helvine . . . . 



Obsidian . . . . 



Opal 



Pitch 



Potassium bromide . 



" chlorstannate . 



" iodide 



Phosphorus 

 Resins : Aloes . 



Canada balsam . 



Colophony . 



Copal . 



Mastic . 



Peru balsam 



Selenium, vitreous 



( bromide 

 Silver < chloride . 

 ( iodide 



Sodalite \ ^,^"^ ;., • , • 

 ( clear like water 



Sodium chlorate 



Spinel . . . . 



Strontium nitrate 



Line of 

 Spectrum. 



(red 

 j green 



D 



red 

 D 



Index of 

 Refraction. 



Authority. 



De Senarmont. 



Grailich. 



DesCloiseaux. 



Fock. 



Beer. 



Ramsay. 



Bedson and 

 Carleton Williams. 



Kohlrausch. 

 Mulheims. 



DesCloiseaux. 



Schrauf. 

 Ayrton & Perry. 



Means. 



Various. 



Jamin. 

 Wollaston. 

 Tschich atscheff . 

 Levy & Lecroix. 



Various. 



u 



Wollaston. 



Topsoe and 

 Christiansen. 



Gladstone & Dale. 

 Jamin. 

 Wollaston. 

 Jamin. 



Wollaston. 

 Baden Powell. 



Wood. 



Wernicke. 



Feusner. 



Dussaud. 



DesCloiseaux. 



Fock. 



Smithsonian Tables. 



