THE VARIATION OF ANGLES OBSERVED IN CRYSTALS. 
505 
of sodium chlorate were diluted with successive additions of 4 or 2 cub. centims. of 
water (warm water being used at first). The results are given in Table X., and are 
represented by crosses in Diagram IL 
Table IX.—Series of Consecutive Determinations made by Method of Total 
Reflection. 
No. 
m. 
e. 
IX. 
t. 
/X at 194 
1 
46-902 
23 16 
1-38599 
o 
20 
1-3862 
2 
43-780 
22 514 
1-38117 
20 
1-3814 
3 
41-045 
22 38 
1-37850 
20 
1-3787 
4 
38-632 
22 22 
1-375.30 
20 
1 - 3755 
5 
36-486 
22 11 
1-37.309 
20 
1 - 3733 
6 
34-567 
21 59 
1-37065 
20 
1-3708 
7 
32-839 
21 48 
1-36841 
204 
1-3687 
8 
31-276 
21 39.1 
1-36668 
20| 
1-3670 
9 
29-855 
21 31J- 
1-36503 
20| 
1■3653 
10 
28-558 
21 24 
1-36349 
21 
1-3639 
11 
27-368 
21 17| 
1-36215 
21 
1-3625 
12 
26-273 
21 11 
1-36080 
21 
1-3612 
13 
25-263 
21 6 
1-35976 
21 
1-3602 
14 
24-328 
21 0 
1-35851 
21 
1-3589 
15 
23-459 
20 56 
1-35768 
21 
1-3581 
16 
21-896 
20 474 
1-35590 
21 
1-3563 
17 
19-906 
20 38 
1-35390 
21 
1-3543 
Table X.—Series of Consecutive Determinations made by Method of Total 
Reflection. 
No. 
m. 
e. 
IX. 
t. 
IX at 19°. 
1 
55-432 
o 
24 
/ 
5 
1 • 39542 
0 
29 
1-3974 
2 
43-432 
22 
47 
1-38029 
26 
1-3817 
3 
39-191 
22 
23 
1-37550 
251 
1-3768 
4 
35-704 
22 
8 . 
1-37247 
214 
1-3730 
5 
32-187 
21 
52 
1-36923 
201 
1-3693 
6 
30-310 
21 
371 
1-36626 
20 
1-3665 
7 
28-182 
21 
251 
1-36380 
191 
1-3639 
8 
26-333 
21 
16 
1-36184 
191 
1-3619 
9 
24-711 
21 
1-35966 
191 
1-3597 
10 
22-002 
20 
524 
1-35695 
19 
1-3569 
11 
19-828 
20 
40 
1-35432 
19 
1-3543 
12 
18-044 
20 
30 
1-35222 
19 
1-3522 
Table XI. represents a series of observations made by means of the hollow prism 
upon 25 cub. centims. of a solution of sodium chlorate concentrated at 19° and diluted 
VOL. ccii. —A. 3 T 
