ON OPTICAL ROTATORY DISPERSION. 
301 
Table XI.—Dispersion-constants and Dispersion-ratios. 
Salt. 
Concentration. 
7, 
v. 
«43S8 
gr./lOO gr. 
gr./lOO c.c. 
Iv. 
a 5461 
Sodium tartrate j (a) 
22-54 
25-72 
20-152 
0-0029 
1-579 
(dihydrate) \(fr) 
34-32 
41-97 
19-537 
0-00032 
1-571 
Potassium tartrate J (a) 
33-60 
41-65 
23-225 
0-0065 
1-591 
(hemihydrate) T(6) 
32-68 
40-26 
22-930 
0-0068 
1-591 
Rochelle salt 11 5 
(tetrahydrate) 
44-63 
55-93 
21-150 
0-0051 
1-586 
Ammonium tartrate 
(anhydrous) 
32-10 
37-075 
22-173 
0-0094 
1-600 
Table XII.-—Dispersion-constants and Dispersion-ratios. 
A 2 . 
a 435S 
^5461 
Quartz (opt.-mag.). 
0-0173 
1-627 
Ethyl alcohol (mag.). 
0-0170 
1-626 
Methyl alcohol (mag.).. 
0-0164 
1-624 
Other alcohols (mag.). 
0-0182 
1-630 
Water (mag.). 
0-0222 
1-645 
Nine methyl carbinols (opt.). 
0-0237 
1-651 
