531 



TABLE 552.— INDICES OF REFRACTION FOR SOLUTIONS OF SALTS AND ACIDS 



RELATIVE TO AIR 



Indices of refraction for spectrum lines 



Substance Density °C C D F H^ H 



Solutions in water 



Ammonium chloride 1.067 27.05 1.37703 1.37936 1.38473 — 1.39336 



025 29.75 .34850 .35050 .35515 - .36243 



Calcium chloride 398 25.65 .44000 .44279 .44938 — .46001 



215 22.9 .39411 .39652 .40206 - .41078 



143 25.8 .37152 .37369 .37876 — .38666 



Hydrochloric acid 1.166 20.75 1.40817 1.41109 1.41774 — 1.42816 



Nitric acid 359 18.75 .39893 .40181 .40857 — .41961 



Potash (caustic) 416 11.0 .40052 .40281 .40808 - .41637 



Potassium chloride normal solution .34087 .34278 .34719 1.35049 - 



double normal .34982 .35179 .35645 .35994 — 



triple normal .35831 .36029 .36512 .36890 - 



Soda (caustic) 1.376 21.6 1.41071 1.41334 1.41936 — 1.42872 



Sodium chloride 189 18.07 .37562 .37789 .38322 1.38746 — 



109 18.07 .35751 .35959 .36442 .36823 — 



035 18.07 .34000 .34191 .34628 .34969 — 



Sodium nitrate 1.358 22.8 1.38283 1.38535 1.39134 - 1.40121 



Sulfuric acid 811 18.3 .43444 .43669 .44168 — .44883 



" 632 18.3 .42227 .42466 .42967 - .43694 



" 221 18.3 .36793 .37009 .37468 — .38158 



" 028 18.3 .33663 .33862 .34285 — .34938 



Zinc chloride 1.359 26.6 1.39977 1.40222 1.40797 — 1.41738 



209 26.4 .37292 .37515 .38026 - .38845 



Solutions in ethyl alcohol 



Ethyl alcohol 789 25.5 1.35971 1.35971 1.36395 — 1.37094 



932 27.6 .35372 .35556 .35986 — .36662 



Fuchsin (nearly saturated) . . - 16.0 .3918 .398 .361 — .3759 



Cyanin (saturated) — 16.0 .3831 — .3705 — .3821 



Note. — Cyanin in chloroform also acts anomalously ; for example, Sieben gives for a 4.5 percent 



solution fiA = 1.4593, mb = 1.4695, fi F (green) = 1.4514, no (blue) = 1.4554. For a 9.9 percent 

 solution he gives ha = 1.4902, fi F (green) = 1.4497, fi (blue) = 1.4597. 



Solutions of potassium permanganate in water 



£*£ 



■as 



^ 



•? en 



.687 M B 



.656 C 



.617 



.594 



.589 



.568 



.553 



.527 



.522 



D 



1.3328 1.3342 — 



.3335 .3348 1.3365 



.3343 .3365 .3381 



.3354 .3373 .3393 



.3353 .3372 — 



.3362 .3387 .3412 



.3366 .3395 .3417 



.3363 — — 



.3362 .3377 .3388 



SMITHSONIAN PHYSICAL TABLES 



