254 
DR. J. H. POYNTJNG AND MR. P. L. GRAY IN SEARCH OE A 
On the assumed law of force, this implies that the attractions between the two 
spheres, with distance 5’9 centims. between their centres, with their axes parallel 
and respectively in like and unlike directions, do not differ by as much as -^ 5-0 of 
the whole attraction. 
This limit is large, undoubtedly owing to the want of axial symmetry in the 
apparatus which produced a semicircular couple as already pointed out. This couple 
was large, and though we attempted to eliminate it by the two sets of observations 
with the different azimuths of the larger sphere, in all probability we failed. 
Table I.—Showing Scale-Readings in Tenths of a Division at Phases at Heads of 
Columns. Time of Revolution of Larger Sphere 115 secs. 
0 . 
1 . 
0 
u. 
3. 
4. 
5. 
6 . 
7. 
8 . 
9. 
1 
55 
61 
61 
64 
61 
42 
25 
2(5 
31 
40 
50 
55 
60 
53 
52 
45 
44 
40 
45 
50 
54 
51 
49 
49 
48 
49 
52 
57 
62 
54 
57 
62 
40 
33 
28 
25 
30 
44 
57 
66 
70 
64 
52 
40 
38 
36 
39 
46 
55 
60 
63 
61 
52 
44 
44 
45 1 
44 
43 
49 
50 
52 
48 
42 
30 
32 
37 i 
45 
50 
62 
71 
69 
62 
52 
42 
39 
38 
44 
55 
58 
65 
65 
66 
61 
51 
45 
45 
41 
38 
40 
49 
56 
61 
62 
60 
56 
50 
48 
42 
39 
37 
40 
42 
58 
69 
69 
68 
58 
48 
41 
38 
38 
42 
48 
54 
60 
57 
55 
50 
43 
41 
41 
42 
47 
49 
55 
57 ! 
63 
60 
58 
49 
46 
47 
46 
44 
51 
52 
50 
54 
48 
45 
44 
40 
36 
40 
50 
60 
67 
67 
62 
54 
44 
33 
35 
35 
38 
50 
57 
62 
68 
62 
62 
45 
36 
36 
39 
44 
51 
56 
59 
53 
47 
48 
53 
51 
50 
49 
50 
49 
52 
50 
50 
51 
53 
52 
54 
55 
48 
47 
44 
41 
44 
52 
55 
58 
60 
56 
49 
41 
41 
42 
43 
47 
50 
55 
60 
60 
60 
56 
58 
47 
43 
47 
49 
50 
50 
50 
54 
54 
54 
48 
50 
51 
49 
52 
52 
45 
42 
43 
48 
49 
55 
56 
52 
52 
52 
57 ! 
56 
51 
46 
42 
42 
43 
49 
51 
55 
55 ■ 
55 
52 
49 
67 
50 
50 
50 
44 
43 
50 
50 
50 
43 
43 
46 
60 
58 
54 
55 
50 j 
49 
49 
49 
48 
50 
51 
54 
53 
56 
56 i 
57 
58 
56 
56 
51 
43 
40 
38 
41 
51 ! 
60 
60 
60 
58 
62 
48 
48 
48 
52 
57 
58 
60 
57 
47 
41 
41 
51 
62 
63 
59 
53 
46 
40 
40 
40 
43 
49 
51 
61 
60 
60 
5G 
51 
48 
42 
42 
43 
51 
59 
63 
62 
61 
55 
52 
51 
60 
51 
51 
52 
56 
58 
58 
53 
45 
40 
41 
49 
60 
70 
70 
60 
52 
48 
48 
60 
60 
54 
55 
53 
51 
50 
50 
47 
50 
50 
52 
53 
53 
50 
48 
48 
46 
48 
50 
51 
51 
50 
50 
52 
52 
49 
46 
44 
44 
49 
50 
55 
59 
57 
58 
51 
49 
46 
43 
44 
51 
59 
68 
64 
56 
50 
42 
40 
49 
57 
68 
71 
70 
59 
50 
