ON OPTICAL ROTATORY DISPERSION. 
299 
Table IX.—Rotatory Dispersion of Ammonium Tartrate in Aqueous Solution at 20° C. 
32-10 gr. (NHJ 2 H 4 C 4 O tf in 100 gr. aqueous solution, 
or 37-075 gr. ,, in 100 c.c. 
Density = 1-1550. Length of tube = 6 dm. 
Simple Formula. Complex Formula. 
[M,] 
22'173 
A 2 —0'0094' 
38-676 
X 2 —0‘038 
17-117 
X 2 —0"06 ' 
X. 
a. 
[M] obs. 
[M] X 2 . 
[MJ. 
[M]—[MJ. 
[M 2 ]. 
[M]-[M 2 ]. 
Cd 6438 
65-57 
54-24 
22-48 
54-74 
-0-50 
54-44 
-0-20 
Na 5893 
79-10 
65-43 
22-72 
65-63 
-0-20 
65-47 
-0-04 
Hg 5790 
82-07 
67-88 
22-76 
68-05 
-0-17 
67-93 
-0-05 
Cu 5782 
82-45 
68-20 
22-80 
68-24 
-0-04 
68-12 
+0-08 
Hg 5769 
82-49 
68-23 
22-71 
68-56 
-0-33 
68-45 
-0-22 
Cu 5700 
85-00 
70-31 
22-84 
70-28 
+0-03 
70-19 
+0-12 
Hg 5461 
92-81 
76-77 
22-89 
76-77 
± 
76-77 
± 
Cu 5219 
101-99 
84-36 
22-98 
84-32 
+0-04 
84-42 
-0-06 
Cu 5154 
104-77 
86-66 
23-02 
86-53 
+0-13 
86-66 
± 
Cu 5105 
106-75 
88-30 
23-01 
88-27 
+0-03 
88-41 
-0-11 
Cd 5086 
107-73 
89-10 
23-05 
88-95 
+0-15 
89-10 
± 
Zn 4811 
120-88 
99-98 
23-14 
99-85 
+0-13 
100-09 
-0-11 
Cd 4800 
121-52 
100-51 
23-16 
100-33 
+0-18 
100-57 
—0-06 
Zn 4722 
125-75 
104-01 
23-19 
103-82 
+0-19 
104-06 
-0-05 
Zn 4680 
128-20 
106-04 
23-22 
105-78 
+0-26 
106-01 
+0-03 
Cd 4678 
128-28 
106-11 
23-22 
105-87 
+0-24 
106-11 
in 
Hg 4358 
148-50 
122-83 
23-33 
122-83 
± 
122-83 
± 
Fe 4271 
155 
128-2 
23-39 
128-2 
± 
128-0 
+0-2 
Fe 4199 
160 
132-3 
23-34 
132-8 
- 0-5 
132-5 
-0-2 
Fe 4144 
165 
136-5 
23-44 
136-6 
-i 0-1 
136-0 
+ 0-5 
Fe 4085 
170 
140-6 
23-46 
140-8 
-0-2 
139-9 
+0-7 
Fe 4046 
172-5 
142-7 
23-36 
142-7 
± 
142-6 
-\-0-l 
Fe 4025 
175 
144-7 
23-45 
145-3 
-0-6 
144-1 
+ 0-6 
Fe 3970 
180 
148-9 
23-47 
149-6 
— 0-7 
148-0 
+ 0-9 
Fe 3919 
185 
153-0 
23-50 
153-8 
-0-8 
151-7 
+1-3 
2 t 2 
