874 MR. G. A. SCHOTT ON THE REFLECTION AND REFRACTION OF LIGHT. 
Water in Flint-glass (128, p. 373). 
IX = 0-8267 ; A = - -20, B = -0100, F = — •0J23, E = - -0751 ; e = - -052. 
{q. 
/3. 
W 
ob.served. 
W 
calculated. 
Differ¬ 
ence. 
Differ- 
! ence, 
Cauchy. 
C 
observed. 
d cal¬ 
culated. 
Differ¬ 
ence. 
Differ¬ 
ence, 
Cauchy. ' 
o 
41 
/ 
55 
o 
40 
19 
O 
8 
31 
o 
7 
30 
o 
+ 1 
1 
1 
± 
51 
-•831 
-•929 
±•098 
± 
•079 
41 
18 
32 
24 
6 
23 
5 
58 
+ 0 25 
± 
16 
-•831 
-•911 
±•080 
± 
•063 
40 
40 
28 
15 
5 
25 
4 
28 
+ 
57 
± 
51 
-•831 
-•877 
±•046 
± 
•026 
40 
3 
19 
58 
3 
40 
0 
59 
+ 
41 
± 
29 
-•786 
-•807 
±•021 
± 
•003 
.S9 
45 
15 
39 
2 
50 
2 
23 
t- 
27 
-f 
14 
-•718 
-•737 
±•019 
+ 
•012 
39 
27 
9 
40 
1 
43 
1 
49 
— 
6 
— 
26 
-•633 
-•620 
-•013 
— 
•Oil 
39 
15 
7 
55 
1 
24 
1 
33 
— 
9 
— 
35 
-•521 
-•513 
-•008 
— 
•047 , 
39 
o 
8 
31 
1 
31 
1 
26 
5 
— 
24 
-•446 
-•392 
-•054 
— 
•031 
38 
50 
8 
54 
1 
35 
1 
29 
+ 
6 
— 
26 
-•274 
-•301 
±•027 
± 
•121 
38 
13 
16 
24 
2 
58 
2 
23 
+ 
35 
+ 
4 
-111 
-•155 
±044 
± 
•113 
37 
36 
21 
51 
4 
3 
3 
43 
+ 
20 
— 
8 
-•025 
-•099 
±•074 
± 
•120 
j 37 
0 
26 
30 
5 
2 
5 
6 
— 
4 
— 
32 
-•014 
-•072 
+ ’058 
± 
•091 
36 
23 
32 
3 
6 
18 
6 
32 
— 
14 
— 
18 
±•004 
— 055 
±•059 
_L 
« 
•092 
So 
47 
38 
3 
7 
51 
7 
56 
— 
5 
± 
41 
+ ■004 
I 
— ^045 
±•049 
± 
•071 ' 
1 
Probable error . 
±20' 
00 , 
: 
±20'-90 
i 
±•0383 
±•0516 
Crown-glass in Air (128, p. 375). 
fx = 1-5149; A = — -0300, B = -00040, F = — -00283, E = + -0113; e:= +-00502, 
fx' = 1-510. 
)• 
/■5 
W 
observed. 
calculated. 
1 
Differ¬ 
ence. 
Differ¬ 
ence, 
Cauchy. 
C 
observed. 
0 
cal¬ 
culated. 
1 
; Differ¬ 
ence. 
Differ- 
! ence, 
Cauchy. 
0 
80 
1 
0 
o 
74 
50 
O 
32 
59 
0 
33 
26 
-27 
-26 
•943 
' -998 
-•055 
-•054 
60 
0 
26 
51 
5 
6 
5 
35 
-29 
-24 
•897 
•981 
-•084 
-•087 
58 
0 
14 
36 
2 
38 
2 
29 
± 9 
±15 
•888 
•961 
-•073 
-•076 
57 
30 
9 
34 
1 
42 
1 
42 
0 
± 5 
•877 
•944 
-•067 
-•070 
57 
0 
6 
9 
1 
5 
0 
58 
± 7 
±17 
•870 
•896 
-•026 
-•028 
56 
40 
3 
38 
0 
38 
0 
31 
± 7 
±16 
•777 
•772 
±•005 
±•010 
56 
30 
2 
11 
0 
22 
0 
23 
- 1 
± 7 
•568 
•579 
-•Oil 
±•024 
56 
20 
2 
42 
0 
29 
0 
24 
± 5 
± 8 
•321 
•315 
±•006 
±•055 
56 
10 
2 
30 
0 
26 
0 
33 
- 7 
- 5 
•162 
•180 
-•018 
±•007 
56 
0 
5 
2 
0 
53 
0 
46 
± 7 
± 5 
•063 
•121 
-•058 
-•041 
55 
30 
8 
33 
1 
31 
1 
30 
± 1 
- 2 
•049 
•059 
-•010 
-003 
55 
0 
11 
9 
1 
59 
2 
16 
-17 
-20 
•035 
•038 
-•003 
±•001 
54 
0 
18 
56 
3 
28 
3 
35 
- 7 
-20* 
•028 
•022 
±•006 
4--008 
52 
0 
31 
58 
6 
17 
6 
51 
-34 
-40 
•025 
•012 
±•013 
±•014 
50 
0 
44 
48 
9 
56 
9 
52 
± 4 
- 1 
•003 
•007 
-•004 
-•Oil i 
Probable eri'or . 
• • 
±10'-39 
±12'-13 
1 
±•0269 
±•0284 
* Recalculated. 
