666 
ME. H. E. EOSCOE ON A METHOD OF MEASUEINO THE 
May 17th, 187.3. 
Clock. 
Hand. 
Time. 
n . 
Mean 
reading. 
I. 
1 1. 
n 
Time. 
n. 
Mean 
reading. 
I. 
I 
n 
h m 
9-6 
41 
1-87 
0-195 
h m r 
11 15 A.M. j 
10 
56 
1-74 
j 
0-174 
11 15 A.M. j 
6-9 
5-3 
90 
148 
1-43 
0-84 
0-207 
0154 
5 
120 
1-06 
0-212 
l 
Mean 
Diff. 
0-193 
-0-006 
Mean 
0-187 
( 
9-6 
47 
1-82 
0-190 
f 
10 
56 
1-74 
0-174 
12 1 5 p.m. \ 
6-9 
75 
1-57 
0-227 
12 15 p.m. \ 
5 
119 
1-10 
0-220 
1 
5-3 
136 
0-86 
0-162 
\ 
10 
55 
1-75 
0-175 
Mean 
0-193 
Mean 
0-190 
Diff. 
4-0-003 
1 15 » { 
10-2 
6-9 
63 
97 
1-68 
1-37 
0-163 
0198 
1 15 „ | 
5 
10 
5 
130 
56 
122 
0- 92 
1- 74 
1-00 
0-184 
0-174 
0-200 
Mean 
0-182 
Mean 
0-186 
Diff 
-0-004 
2 15 „ j 
3-6 
5-3 
144 
140 
078 
0-82 
0-216 
0-155 
2 15 „ | 
5 
10 
5 
127 
57 
126 
0- 95 
1- 73 
0-96 
0-190 
0-173 
0-192 
Mean 
0-185 
Mean 
0-185 
Diff 
0-000 
f 
5-3 
145 
0-77 
0-145 
f 
10 
78 
1-54 
0-154 
3 15 „ \ 
6-9 
92 
1-42 
0-205 
3 15 „ \ 
5 
139 
0-83 
0-166 
i 
10-2 
58 
1-72 
0-170 
1 
10 
85 
1-48 
0-148 
Mean 
0-173 
Mean 
0-156 
Diff. 
+ 0-017 
r 
6-9 
143 
0-79 
0114 
[ 
15 
97 
1-37 
0-091 
4 15 „ { 
17-1 
71 
1-60 
0-094 
4 15 „ 1 
10 
122 
1-00 
0-100 
1 
9-6 
135 
0-87 
0-091 
1 
15 
99 
1-35 
0-090 
Mean 
0-099 
Mean 
0-094 
Diff. 
+ 0-005 
5 15 „ | 
10-2 
171 
20-2 
150 
124 
114 
0-70 
0- 98 
1- 22 
0-068 
0-057 
0-060 
5 15 „ | 
20 
15 
15 
15 
125 
128 
129 
135 
0-97 
0-94 
0-93 
0-87 
0-049 
0-062 
0-062 
0-058 
Mean 
0-062 
Mean 
0-056 
Diff. 
+ 0-006 
6 15 „ | 
20-2 
154 
0-64 
0-032 
6 15 „ | 
20 
158 
0-58 
0-029 
31-7 
152 
1-00 
0-032 
25 
148 
0-74 
0-030 
Mean 
0-032 
Mean 
0-029 
Diff. 
+ 0-003 
