78 On a Possible Explanation of the Method employed hy Nobert 
TABLE II. 
CONTIGUOUS ERROKS. 
Spaces. 
I. 
Nobert. 
II. 
Rutherford. 
III. 
Rogers. 
fraction of inch. 
fraction of inch. 
fraction of inch. 
1 
\ 
1 
15200 
50700 
2 
1 
25300 
1 
25300 
1 
76000 
3 
25300 
1 
0 
4 
1 
1 
1 
76000 
21700 
152000 
5 
1 
1 
00\J\}\M 
16900 
76000 
6 
0 
1 
1 
152000 
152000 
7 
1 
\ 
30400 
50700 
152000 
8 
1 
9500 
76000 
1 
30400 
9 
1 
25300 
1 
0 
10 
50700 
50700 
1 
76000 
11 
1 
1 
Tisoo" 
1 
50700 
12 
1 
30400 
1 
30400 
1 
152000 
13 
1 
15200 
76000 
152000 
14 
1 
50700 
30400 
1 
38000 
15 
1 
15200 
1 
25300 
1 
19000 
16 
1 
1 
1 
30400 
60700 
152000 
17 
1 
13800 
0 
1 
38000 
18 
1 
50700 
1 
76000 
1 
152000 
19 
1 
"76000 
0 
0 
