668 
ME. H. E. EOSCOE ON A METHOD OE MEASUEING THE 
June 9th, 1873. 
Time. 
Clock. 
Hand. 
n. 
Mean 
reading. 
I. 
I 
n 
Time. 
n. 
Mean 
reading. 
I. 
I 
n 
17-1 
132 
0-66 
0*039 
h 
m | 
15 
136 
0-63 
0-042 
20-2 
120 
0-75 
0-037 
7 30 a.m. •< 
20 
115 
0-77 
0-039 
31-7 
56 
1-25 
0-039 
30 
56 
1-25 
0-042 
Mean 
0-039 
Mean 
0-041 
Diff. 
-0-002 
6-9 
114 
0-78 
0-113 
i 
10 
84 
0-95 
0-095 
9-6 
85 
0-94 
0-098 
8 
o „ \ 
15 
17 
1-61 
0-107 
10-2 
55 
1-26 
0-124 
\ 
10 
50 
1-31 
0-131 
Mean 
0-112 
Mean 
0-111 
Diff. 
+ 0-001 
5-3 
139 
0-61 
0-115 
6-9 
77 
0-99 
0-143 
9 
o „ 
No obse 
rvations. 
9-6 
47 
1-34 
0-140 
Mean 
0-133 
10-2 
140 
0-60 
0-059 
r 
10 
137 
0-62 
0-062 
17-1 
110 
0-80 
0-047 
10 
o „ \ 
15 
116 
0-77 
0-051 
20-2 
70 
1-07 
0-053 
1 
20 
62 
1-19 
0-060 
Mean 
0-053 
Mean 
0-058 
Diff. 
-0-005 
5-3 
138 
0-61 
0-115 
f 
10 
30 
1-49 
0-149 
9-6 
20 
1-58 
0-165 
11 
0 „ \ 
10 
18 
1-60 
0-160 
10-2 
17 
1-61 
0-158 
1 
15 
Mean 
0-146 
Mean 
0-154 
Diff. 
—0-008 
9-6 
117 
0-76 
0-079 
f 
10 
70 
1-07 
0-107 
10-2 
105 
0-83 
0-081 
12 
0 „ \ 
10 
73 
1-03 
0-103 
17-1 
11 
1-67 
0-098 
1 
15 
17 
1-61 
0-107 
Mean 
0-086 
Mean 
0-106 
Diff. 
-0-020 
3-6 
132 
0-66 
0-183 
5-3 
121 
0-74 
0-140 
1 
0p.m. 
No obse 
rvations. 
6-9 
25 
1-54 
0-223 
Mean 
0-182 
5-3 
114 
0-78 
0-147 
f 
5 
113 
0-78 
0-156' 
6-9 
112 
0-79 
0-114 
2 
o„ \ 
10 
18 
1-60 
0-160 
9-6 
72 
1-04 
0-108 
1 
10 
15 
1-63 
0-163 
Mean 
0-123 
Mean 
0-160 
Diff. 
-0-037 
7 30 a.m. 
8 0 „ 
9 0 
10 0 
11 0 
12 0 
1 0 p.m. 
