MR. G. A. SCHOTT ON THE REFLECTION AND REFRACTION OF LIGHT. 869 
Ferric Chloride Solution ^—Air (31, p. 175). 
= 1-372, A = + -00083, B = -00068, F = + -00005, E — - -02-22, e = - -01 056. 
Iq. 
ft- 
ur 
observed. 
uT 
calculated. 
Differ¬ 
ence. 
Differ¬ 
ence, 
Cauchy. 
1 
- 'V 
^ 2 
observed. 
6 
cal¬ 
culated. 
Differ¬ 
ence. 
Differ¬ 
ence, 
C.AUCHY. 
o 
55 
29 
o 
26 
/ 
0 
O 
2 
27 
o 
2 
i 
31 
/ 
4 
/ 
8 
-•954 
-•952 
•002 
•019 
55 
23 
25 
0 
2 
20 
2 
22 
— 
2 
— 
15 
-•938 
-•948 
+ 
•010 
— 
•001 
55 
17 
24 
0 
2 
14 
2 
12 
+ 
2 
— 
2 
-•930 
-•922 
— 
•008 
•004 
55 
11 
23 
0 
2 
8 
2 
3 
+ 
5 
■1 
1 
-•912 
-•917 
+ 
•005 
+ 
•009 
1 55 
5 
20 
0 
1 
49 
1 
54 
— 
5 
— 
8 
-•930 
-•910 
— 
•020 
— 
•016 
1 54 
59 
19 
0 
1 
44 
1 
45 
— 
1 
— 
4 
-•911 
-•902 
— 
•009 
— 
•004 
54 
53 
18 
10 
1 
39 
1 
36 
+ 
3 
— 
1 
-•899 
- -893 
— 
•006 
— 
•001 
1 54 
47 
15 
30 
1 
23 
1 
27 
4 
— 
6 
-•887 
-•882 
— 
•005 
•000 
54 
40 
14 
0 
1 
15 
1 
16 
1 
— 
6 
-•867 
-•866 
— 
•001 
+ 
•007 
54 
35 
13 
0 
1 
9 
1 
9 
0 
+ 
1 
-•848 
-•851 
+ 
•003 
+ 
•010 
54 
29 
10 
30 
0 
56 
1 
1 
— 
5 
— 
3 
-•832 
-•829 
_ 
•003 
+ 
•005 
54 
23 
9 
0 
0 
48 
0 
53 
— 
5 
— 
7 
-•810 
-•802 
— 
•008 
— 
•001 
1 54 
17 
8 
30 
0 
45 
0 
46 
— 
1 
— 
2 
-•743 
-•764 
+ 
•021 
+ 
•030 
! 54 
11 
8 
0 
0 
42 
0 
40 
+ 
2 
-f 
2 
-•706 
-•714 
+ 
•008 
+ 
•017 
54 
5 
7 
0 
0 
37 
0 
36 
-1- 
1 
+ 
2 
-•639 
-•648 
+ 
•009 
+ 
•017 
53 
59 
7 
0 
0 
37 
0 
33 
+ 4 
+ 
2 
-•546 
-•564 
+ 
•018 
+ 
•029 
53 
55 
7 
0 
0 
37 
0 
32 
+ 
5 
+ 
5 
-•500 
-•501 
+ 
•001 
•000 
53 
50 
7 
0 
0 
37 
0 
34 
+ 
3 
-f 
5 
-•416 
-•424 
+ 
•008 
+ 
•006 
53 
44 
8 
30 
0 
45 
0 
39 
+ 
6 
+ 10 
-■.361 
-•342 
— 
•019 
— 
•024 
1 53 
38 
8 
30 
0 
45 
0 
44 
+ 
1 
+ 
4 
-•318 
-•277 
— 
•041 
— 
•047 
53 
32 
9 
0 
0 
48 
0 
52 
— 
4 
0 
-•2.52 
-•229 
— 
.023 
— 
•030 
53 
26 
10 
0 
0 
53 
0 
59 
— 
6 
— 
2 
-•183 
-•193 
+ 
•010 
+ 
•004 
53 
20 
12 
0 
1 
4 
1 
8 
— 
4 
0 
-•161 
-•166 
+ 
•005 
— 
•002 
53 
14 
13 
30 
1 
12 
1 
16 
— 
4 
0 
-•142 
-•145 
+ 
•003 
— 
•003 
53 
8 
16 
0 
1 
26 
1 
25 
+ 
1 
+ 
5 
-•128 
• 
53 
2 
18 
0 
1 
38 
1 
34 
+ 4 
+ 
8 
-•101 
-•115 
+ 
•014 
+ 
•009 
1 52 
56 
18 
0 
1 
38 
1 
43 
— 
5 
— 
1 
-•099 
-•104 
+ 
•005 
•000 
52 
50 
20 
0 
1 
49 
1 
52 
— 
3 
+ 
6 
-•092 
-•095 
+ 
•003 
— 
•001 
52 
44 
22 
0 
2 
1 
2 
2 
— 
1 
+ 
3 
-•070 
-•087 
+ 
•017 
+ 
•013 
52 
38 
24 
0 
2 
14 
2 
11 
+ 3 
+ 
7 
-•060 
-•081 
+ 
•021 
+ 
•017 
52 
32 
25 
0 
2 
20 
2 
20 
0 
— 
1 
-•047 
-•075 
+ 
•028 
+ 
•024 
52 
25 
26 
0 
2 
27 
2 
32 
— 
5 
-38 
-•036 
-•069 
+ 
•033 
+ 
•030 
Pi'obable error . 
• • 
• • 
±2 
•39 
±5 
•77 
i' 
0986 
±- 
1159 
