DE. GLADSTONE ON THE EEFE ACTION-EQUIVALENTS OE THE ELEMENTS. 11 
Table II. — Binary Compounds. 
Substance. 
Formula. 
Part 
of 
Spectrum. 
Refractive 
index. 
Authority 
for 
index. 
Refraction- 
equivalent. 
CS 
A 
1-6121 
Gladstone and Dale 
36-67 | 
C 
1-61846 
Wiillner 
3720 
” 
D 
1 -6299 
Gladstone and Dale 
37-73 
Bright 
1-001500 
D along 
3321 
CO 
1-000340 
7-53 
CO 
1 000449 
10 03 
CN" 
1-000834 
918 
CC1, 
A 
1-4560 
Gladstone 
44-2 
c 
1-45789 
Haagen 
44 21 
C, IT, 
Bright 
1-000678 
Dulong 
15-09 
c:h 10 
A" 
1-3844 
Gladstone and Dale 
37-63 
! Oil of Turpentine 
c;„h; 0 
A 
1-4614 
72-9 
1 Hydride of CEnantliyle 
C- IT, 
A 
1-3899 
„ „ 
55-0 
Caprvl 
(’ 11, 
A 
1-3973 
62 95 
SO 
P right 
1 -000665 
Dulong 
14-91 
D 
1-33835 
Ketteler 
14-59 
h‘ s 
Bright 
1-000644 
Dulong 
14-28 
S, 01 
c 
1 -64368 
I laagen 
51-64 
H, 0 
D 
1-3089 
Gladstone and Dale 
605 
A 
1-32924 
Gladstone 
5-926* 
D 
1-33328 
5-999* 
IL 
1-34393 
6-191* 1 
c 
1-33111 
Landolt 
5-96 1 
>» * 
D 
1 -33250 
6006 
1 000260 
5-778 
HC1 
1-000419 
10-71 
NIL, 
1 000385 
8-60 
N„ 6 
1-000503 
11-22 
Nitric ,, 
N‘0 
1-000303 
6-74 
Terchloride of Phosphorus 
PCI 
A 
1-5062 
48-3 
PBr, 
A 
1-6730 
63-36 
Arsenious Anhydride 
As 0 0, 
1-748 
4003 
Terchloride of Arsenic 
As CC 
C 
1-5920 
49-59 
Pentaehloride of Antimony 
Sb Cl 
c 
1-5845 
74-61 
A 
1-5739 
Gladstone 
7403 
Tetrachloride of Silicon 
Si Cl, 
C 
1-4119 
47-06 
Tin 
Sn Cl, 
c 
1-5070 
59-05 
j „ 
A 
1-5035 
58-76 
. , Titanium 
Ti Cl, 
A 
1-5856 
65*08 
I Chloride of Sodium 
Na Cl 
A 
1-5369 
15 02 
Calomel 
Hg, Cl 
Bright 
1-970 
CaF., 1 
1-436 
10-76 
Quartz, ordinary ray 
Si 0 
1-5484 
12-41 
extraordinary ray 
3 ' y 
1 -5582 
12-63 
* These are the numbers adopted throughout the series of aqueous solutions, with the new instrument, 
recorded in Appendix II. The water was purposely not deprived of air. 
