Tables 344-34S. 



INDEX OF REFRACTION. 



TABLE 344. — Miscellaneous Biaxial Crystals. 



289 



Crystal. 



Ammonium oxalate, (NH<)sC204.HjO. . . 

 Ammonium acid tartrate, 



(NH4)H(C.H406) 



Ammonium tartrate, (NH4)jC«H«0«. .... 



Antipyrin, CuHuNOs 



Citric acid, CeHsOy.HiO 



Codein, C18H21NO3.H2O 



Magnesium carbonate, MgC03.3H20 .... 

 sulphate, MgS04.7HjO 



Potassium bichromate, K2Cri07 



" chromate, KiCrO* 



" nitrate, KNO3 



" sulphate, KjSOi 



Racemic acid, C4H6O6.H2O 



Resorcin, C6H6O2 



Sodium bichromate, Na;Cr207.2H20 



acid tartrate, NaH(C4H40G).2H20 

 Sugar (cane), C12H21O11 



Tartaric acid, CiHeOt (right-) 



Zinc sulphate, ZnS04.7H20 



Spectrum 

 line. 



D 



D 



D 



D 



D 



D 



D 



D 

 Cd, 0.226M 

 H, 0.656/* 



D 



D 

 red 



D 



F 



D 



C 

 yellow 



D 



D 

 red 



Tl 



D 



Li 



D 



F 



D 



C 



Index of refraction. 



1-4381 



S188 



5697 



4932 



5390 



495 



432 



4990 



4307 



7202 



6873 

 3346 

 4976 

 4932 

 491 1 



I. 6610 



1.5422 

 1-5397 

 1-5379 

 1-4953 

 I . 4620 

 1.4568 

 1-4544 



I 5475 



I. 5614 



1-581 



1-6935 



1-4977 



I - 5435 



1.501 



1-455 



1.5266 



1-4532 



1.7380 



1 - 7254 



1.722 



I - 5056 



1-4992 



I . 4Q46 



1.4928 



1-526 



1-555 



I . 6994 



1-5332 



1-5685 



1.5667 



1 - 5639 



1-5353 



1.4860 



I . 4801 



1.4776 



I -7324 

 1 - 5089 



r.526 

 1. 461 

 1-5326 

 1-4584 

 I. 8197 



I -7305 

 I . 5064 

 I-5029 

 1 . 4980 

 1-4959 



1-7510 



1-5734 

 1.S716 

 I - 5693 

 1.6046 

 1.4897 

 1.4836 



Authority. 



Brio 



T. and C* 



Cloisaux 



Liweh 



Schrauf 



Grailich 



Genth 



Means 



Borel 



Dufet 

 T. and C. 

 Mallard 

 Schrauf 

 T. and C. 



Groth 



Dufet 



Brio 



Calderon 



Means 

 T. and C. 



* Topsoe and Christiansen. 



TABLE 345. — Miscellaneous Liquids (see also Table 346), Liquefied Gases, Oils, 



Fats and Waxes. 



Smjthsonmn Ta8j.es. 



