28 DR. GLADSTONE ON THE REFRACTION-EQUIVALENTS OF THE ELEMENTS 
Appendix. 
Received June 26, 1869. 
I. Refractive Indices. 
Substance. 
Formula. 
Specific 
gravity. 
Tempe- 
rature 
Centi- 
grade. 
M- 
pD. 
pH. 
Refraction- 
equivalent. 
Bromine 
Br 
3-085 
12 
1-6260 
16-23 
Water 
HO 
10 
15 
1 -32924 
1-33328 
1-34393 
5-92632 
Bock-salt 
Na Cl 
2086 
1-5369 
1-5443 
1-5685 
1502 
Carbon Tetrachloride 
CC1 4 
I-588S 
1-4560 
44-2 
Tin ,, 
Sn Cl 4 
2-231 
20 
1*5035 
1 5124 
1 5429 
5876 
Titanium ,, 
Ti ci; 
1727 
1-5856 
1 -6039 
65-08 
Antimony Pentachloride 
Sb Cl! 
2-322 
1 7-5 
1-5739 
1-5871 
7403 
Vanadium Oxychloride 
voci, 
1-841 
12 
1 6143 
1-6416 
57-96 
Chromium ,, 
CrO Cl 
1-008 
23 
1 5177 
1-5242 
4208 
Sulphuric Acid 
II s6 t “... 
1-882 
115 
1-4205 
1-4251 
1-4366 
21-90 
Nitric Acid 
hN 0‘ 
1 549 
13 
1-4047 
1-4115 
16-46 
Alcohol 
C H.O 
0797 
12 
1-3615 
1 -3655 
1-3769 
20-857 
Methylated Acetone 
C'lPO 
0-811 
13 
1-3817 
1-3860 
1-3991 
33-89 
Butyrone 
C- H. . O 
0-825 
13 
1-4073 
1-4116 
1-4262 
56-29 
Ethylic Phosphite 
(C,H.),PO. 
1-074 
20 
1-3996 
1-4032 
1-4160 
6176 
Mercuric Methyl 
Hg(CH 3 ) 2 
2-966 
30 
1-5229 
15336 
1-5683 
4054 
II. Aqueous Solutions. 
Substance. 
1 
Formula. 
Equiva- 
lents of 
water. 
Specific 
gravity. 
Tempe- 
rature 
Centi- 
grade. 
p A. 
pD. 
pH. 
Refrac- 
tion- 
equiva- 
lent. 
Potasi'ium Chloride 
K Cl 
20 
1119 
15-5 
1-3535 
1-3581 
1-3704 
1S-80 
22 
1-108 
15 5 
1-3511 
1-3560 
1-3682 
18-74 
* S} 
” 
24 
1100 
15-5 
1-3493 
1 -3542 
I -3662 
18-63 
26 
1-093 
15 5 
1-3482 
1-3527 
1-3646 
18-80 
28 
1087 
16-5 
1-3478 
1-3521 
1-3638 
1912 
’ 
13 
1-167 
13 
1-3625 
1-3670 
1-3800 
18-84 
” 
30 
1-082 
15 
1-3462 
1 350(5 
1 3625 
18-89 
15 
1-148 
13 
1-3591 
1-3637 
1-3768 
18-84 
Bromide 
KBr 
13 
1-292 
125 
1-3747 
1-3801 
1-3953 
25 09 
Iodide 
K I 
13 
1-421 
13-5 
1 -4006 
1-4073 
1-4287 
35-72 
,, Nitrate 
KNO 
25 
1125 
13-5 
1 -3476 
1-3519 
1-3647 
22-11 
24-77 
1-125 
14-5 
1-3476 
1-3522 
1-3647 
22-10 
Nitrite 
KNO 
17 
1-136 
24-5 
1-3487 
1-3528 
19-31 
,, Formiate 
K C HO 
9-37 
1-220 
17 
1-3647 
1 -3692 
1-3818 
20-03 
1171 
1779 
9 
1-3591 
l*3(i36 
1-3758 
20-46 

K C II O 
10 
1789 
14 
1-3721 
1-3765 
1-3891 
27-78 
,, Lactate 
k c:H ln O 
11-04 
1-316 
8-5 
1-4103 
1-4145 
1-4297 
76-37 
1-162 
10-5 
1-3725 
1-3771 
1-3897 
76-14 
„ 
,, Cyanide 
kcn‘ 
673 
1795 
13 5 
1-3648 
1-3694 
1-3822 
17-23 
Sulphocyanide ... 
KCNS 
9 
1-208 
14-5 
1-4047 
1-4105 
1-4297 
33-47 
Chromate 
K , Cr O l 
16 
1-231 
14 5 
1 -3853 
1-3924 
5 1 -50 
,, Hydrate 
kTi 0 .? 
5-47 
1-368 
11-5 
1-3987 
1-4040 
1-4187 
12-61 
,, Fluoride 
kf 
20 
1711 
18 
1-3403 
1-3448 
1-3555 
9-55 
Sulphate 
107-5 
1-069 
11-5 
1-3397 
1-3441 
1-3551 
3311 
Bisulphate 
KilSO, 
38-5 
1728 
13 
1 3472 
1-3514 
1-3623 
27-00 
. , Tartrate 
K CjH‘o c 
19 
1-300 
17-5 
1-3900 
1-3947 
1-4074 
57-87 
Oxalate 
k!c‘‘o,‘ .." 
54-28 
1-112 
10-5 
1-3497 
1-3541 
1-3658 
37-71 
,, Ferrocyanide 
K' C, N„ Fe 
45-86 
1725 
13 
1-3667 
1-3719 
1-3866? 
114-24 
53-68 
1713 
14-5 
1-3635 
1-3682 
1-3819 
115-20 
,, Ferricyanide 
K 3 c”n g Fe 
77 
1709 
25-5 
1-3606 
1-3657 
101-44 
68-47 
1710 
13 
1-3616 
1-3669 
102-73 
53-99 
1749 
1-3728 
1-3783 
101-99 
162 
1-027 
11 
1-3360 
45-9 
Hyposulphite 
K, S 0 3 ‘ 
13 07 
1-397 
1-4118 
1-4174 
1 -4335 
47-88 
,, Silicate 
Si O j — 0 07K, O 
8-18 
1-334 
17 
1-3795 
1-3842 
1-3962 
29-68 
,, Carbonate 
K.CO, 
26 
1-222 
14 5 
1-3681 
1 3731 
1-3855 
28 54 
* 
15-66 
1-327 
18 
1-3847 
1-3894 
1-4018 
28-97 


28-17 
1-203 
20 
1-3649 
1-3695 
1-3811 
28-79 
