MR. G. A. SCHOTT OH THE REFLECTION AND REFRACTION OF LIGHT. 863 
Diamond—Air (29, p. 297). 
fji = 2-434; A = - -0183, B = -00353, F = - -00045, E = + -03577; e = + -0180. 
t 
0- 
A 
-37 
observed. 
calculated. 
Differ¬ 
ence. 
Differ¬ 
ence, 
Cauchy. 
\ 
^ ~ 2 
observed. 
6 
cal¬ 
culated. 
Differ¬ 
ence. 
Differ¬ 
ence, 
Cauchy. 
o 
75 
t 
0 
o 
66 
22 
0 
13 
30 
O 
13 
25 
' 
+ 5 
+ 13 
•962 
•969 
•007 
•008 
74 
0 
64 
7 
12 
13 
11 
31 
-1-42 
+ 50 
•955 
•963 
— 
•008 
— 
•009 
73 
0 
58 
37 
9 
46 
9 
40 
+ 6 
+ 3 
•948 
•955 
— 
•007 
— 
•008 
72 
0 
52 
15 
7 
44 
7 
51 
— 7 
+ 2 
•940 
•944 
— 
•001 
— 
•002 
71 
0 
45 
22 
5 
53 
6 
5 
-12 
- 3 
•928 
•927 
+ 
■001 
•000 
70 
0 
34 
52 
4 
11 
4 
23 
-12 
- 3 
•897 
•896 
+ 
•001 
•000 
69 
30 
31 
57 
3 
45 
3 
34 
+ 11 
+ 20 
•868 
•870 
— 
•002 
— 
•004 
69 
0 
26 
7 
2 
57 
2 
48 
+ 9 
+ 39 
•826 
•829 
— 
•003 
— 
•003 
68 
30 
18 
45 
2 
3 
2 
7 
- 4 
+ 5 
•769 
•759 
+ 
■010 
+ 
•on 
68 
0 
14 
0 
1 
30 
1 
36 
- 6 
+ 2 
•640 
■634 
+ 
•006 
+ 
•on 
67 
75* 
13 
2 
1 
23 
1 
28 
- 5 
+ 1 
•545 
•545 
000 
+ 
•007 
67 
30 
12 
52 
1 
22 
1 
25 
- 3 
- 1 
•437 
•439 
— 
■012 
— 
•004 
67 
15 
14 
37 
1 
34 
1 
31 
+ 3 
+ 2 
•363 
•362 
+ 
•001 
+ 
•009 
67 
0 
16 
22 
1 
45 
1 
43 
+ 2 
+ 2 
•288 
•292 
— 
•004 
+ 
•002 
66 
30 
21 
35 
2 
23 
2 
15 
+ 8 
+ 3 
•202 
•201 
+ 
•001 
+ 
•005 
66 
0 
27 
35 
3 
9 
2 
56 
+ 13 
- 7 
•155 
•150 
+ 
•005 
+ 
■008 
65 
0 
35 
45 
4 
20 
4 
24 
- 4 
- 9 
•105 
•099 
+ 
•006 
+ 
•008 
64 
0 
43 
40 
5 
46 
5 
51 
- 5 
+ 12 
•073 
■073 
•000 
+ 
•003 
63 
0 
51 
45 
7 
36 
7 
19 
+ 17 
+ 10 
•063 
•058 
+ 
•005 
+ 
•006 
62 
0 
54 
15 
8 
18 
8 
45 
-27 
-36 
•047 
■047 
•000 
•000 
61 
0 
59 
15 
10 
1 
10 
10 
- 9 
-16 
•042 
•040 
+ 
•002 
+ 
•003 
60 
0 
62 
53 
11 
35 
11 
32 
+ 3 
+ 1 
•032 
■035 
— 
■003 
— 
•002 
Probable error . 
■ • 
± 9'-10 
±ll'-84 
±•0038 
±•0042 
* Jamin has 't-Q = 67° 55', which is a misprint, since Jamin’s own calculation of c with = 67'’ 55' ought 
to give r = -598, Avhilst = 67° 45' gives -538, the actual number in the table. 
