37° 



TABLES 4-08 AND 409 



INDEX OF REFRACTION 

 TABLE 408. — Miscellaneous Biaxial Crystals 



Crystal. 



Ammonium oxalate, (NH4)2C20«.H20 

 Ammonium acid tartrate, 



(NH4)H(C4H 4 6 ) 



Ammonium tartrate, (NH<)2C4H«06. . 



Antipyrin, Q1H12NO2 



Citric acid, CeHsO-.rfcO 



Codein, C18H21NO3.H2O 



Magnesium carbonate, MgCC<3.3H20. 

 sulphate, MgS04.7H 2 0. . 



Potassium bichromate, KjCrzO? 



" chromate, K2C1O4 



" nitrate, KNO3 



" sulphate, K2SO4 



Racemic acid, C4H6O6.H2O 



Resorcin, CoHeC^ 



Sodium bichromate, Na2Cr207.2H20. . 



acid tartrate, NaH(C4H40c).2H 2 

 Sugar (cane), C12H22O11 



Tartaric acid, C4H6O6 (right-) 



Zinc sulphate, ZnS04.7H20 



Spectrum 

 line. 



D 



D 

 D 

 D 

 D 



D 



D 



D 

 , 0.226/x 

 , 0.656/.! 



D 



D 

 red 



D 



F 



D 



C 

 yellow 



D 



D 

 red 



Tl 



D 



Li 



D 



F 



D 



C 



Index of refraction. 



i-438i 



1.5188 



1 • 5°97 

 1-4932 

 I- 530O 

 1-495 

 1-432 

 1 . 4990 

 1 - 4307 

 I. 7202 



16873 

 1-3346 

 1.4976 

 1-4932 

 1.4911 



I. 6610 



1.5422 

 1-5397 

 1-5379 

 I ■ 4953 

 1.4620 

 1 ■ 4568 

 1-4544 



1-5475 



I. 5614 



I. 581 



1 • 6935 



1-4977 



1-5435 



I- 5°l 



1-455 



1. 5266 



1-4532 



1.7380 



1-7254 



1. 722 



I-5056 



1-4992 



I . 4946 



I.4928 



I.526 



1-555 



1 . 6994 



1-5332 



1.5685 



1.5667 



1-5639 



1 ■ 5353 



1 . 4860 



1 . 4801 



1.4776 



1526 

 1. 461 

 1-5326 

 1 - 4584 

 1-8197 



I • 7305 

 I . 5064 

 1.5029 

 I . 4980 

 I • 4959 



1-751° 



1-5734 

 1. 5716 

 1 ■ 5693 

 1 . 6046 

 1 . 4897 

 14836 



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 409. — Miscellaneous Liquids (see also Table 410), Liquefied Gases, Oils, 



Fats and Waxes 



Substance. 



Liquefied gasei 



Br 2 



Cl 2 



CO2 



C2N2 



C2H4 



H2S 



N 2 



NH3 



NO 



N2O 



O2 



SO2 



HC1 



HBr 



HI 



Oils: 



Almond 



Castor 



Citronella. . . . 



Clove 



Cocoanut. . . . 



Cod liver. . . . 



Cotton seed . . 



Croton 



Eucalyptus . . 



Lard 



Temp. 

 °C 



14 



15 



18 

 6 



iS.s 

 ■190 



16.5 

 -90 



15 

 •1S1 



15- 



16. 5 



10 



16.5 



15-5 

 15 



15-5 



15 



15-5 



Substance. 



Oils: 



Lavendar. . . . 



Linseed 



Maize 



Mustard seed 

 Neat's foot. . 



Olive 



Palm 



Peanut 



Peppermint. . 



Poppy 



Porpoise 



Rape (Colza) . 



Seal 



Sesame 



Soja bean 



Sperm 



Sunflower . . . . 



Tung 



Whale 



Fat 1 ; and Waxes: 

 Beef tallow . . . 



Beeswax 



Carnauba wax. 

 Cocoa butter. . 



Lard 



Mutton tallow 



Temp 



'C 



20 



15 



15-5 



15-5 



15 



15- 5 



60 



155 



20 



15-5 



25 



15-5 



25 



15-5 



15-5 



IS- 5 



15 5 



19 



40 



40 

 75 

 84 



Index for D 

 0.589/1. 



464-1 . 466 



4820-1.4852 



4757-I-4768 



4750-1 .4762 



4695-1 . 4708 



4703-1. 4718 



45io 



4723-1 -4731 



464-1 . 468 



4770 



4677 



4748- 



4741 



4742 



476o- 



4665-1.4672 



4739 



503 



4649 



•4752 



■4775 



4552- 

 4398- 

 4520- 

 456o- 

 4584- 

 45IO 



[■4587 

 [-4451 

 [-4541 

 [.4518 

 [ . 4601 



Refer- 

 ence. 



References: (a) Martens; (b) Bleekrode, Pr. Roy. Soc. 37, 339. 1884; (c) I iveing, Dewar, Phil. Mag., 

 1892-3; (d) Tolman, Munson, Bui. 77, B. of C. Dept. Agriculture. 1005; (e) Seeker, Van Nostrand's 

 Chemical Annual. For the oils of reference d, the average temperature coefficient is 0.000365 per ° C. 



Sm'thsonian Tables. 



