338 
LORD WROTTESLEY ON THE PERIODICAL OBSERVATION OF STARS 
Table I. 
Year, Month 
and Day. 
Fraction 
of year. 
Position. 
Probable 
error. 
Computed 
weight. 
Assigned 
weight. 
Distance. 
Assigned 
weight. 
Magni- 
tudes. 
Colours. 
Observer. 
7 Arietis. 
1843. July 11. 
•523 
179 
44 
21-18 
2 
5 
9-383 
5 
5—5 
White. 
G. 
Aug. 7- 
•597 
178 
59 
14-02 
5 
7 
9-103 
7 
6—6 
Yellowish green. 
G. 
11. 
•608 
179 
8 
9-40 
11 
8 
8-865 
8 
6—6 
Yellowish. 
G. 
1844. Jan. 13. 
•033 
179 
42 
8-66 
13 
5-3 
8-976 
5-1 
5—5 
White. 
S. 
Feb. 8. 
•104 
179 
43 
15-23 
4 
4-1 
8-933 
4-2 
5—5 
White. 
s. 
1845. Jan. 21. 
•055 
178 
48 
13-96 
5 
3-2 
8-720 
2-8 
5—5 
Yellowish. 
p. 
24. 
•063 
181 
24 
8-94 
13 
2-9 
8-943 
3-1 
5-6— 5-6 
Yellowish. 
p. 
Feb. 1. 
•085 
180 
59 
11-98 
7 
1-9 
8-837 
1-8 
5-6 — 5-6 
Yellowish. 
p. 
17. 
•129 
179 
57 
16-02 
4 
7-1 
8-794 
7-3 
5-6 — 5-6 
Yellow. 
p. 
1847. Jan. 29. 
•077 
178 
13 
7-36 
19 
5-7 
8-796 
5-8 
5—5 
Yellow. 
p. 
31. 
•082 
178 
15 
9-86 
10 
5-8 
8-750 
5-9 
5-6 — 5-6 
Yellow. 
p. 
Aug. 3. 
•586 
179 
19 
11-04 
8 
5*6 
8-736 
5-8 
5—5 
Yellowish. 
p. 
19. 
•630 
178 
36 
8-14 
15 
6-1 
8-700 
6-2 
5-6 — 5-6 
Yellowish. 
p. 
32 Eridani. 
1843. Aug. 18. 
•627 
346 
29 
9-91 
10 
8 
6-866 
8 
6-7—8 
White. 
G. 
Sept. 4. 
•674 
345 
24 
7-10 
20 
6 
6-784 
6 
6-7 
White. 
G. 
7. 
•682 
345 
56 
7-58 
18 
7 
6-981 
7 
6-7—8 
White. 
G. 
1845. Feb. *7. 
•101 
351 
51 
9-28 
12 
2-9 
6-677 
3-2 
6-7—8 
Yellow and blue. 
P. 
16. 
•126 
350 
42 
10-85 
9 
7 
6-898 
6-8 
6-7— 8-9 
Red. 
P. 
17. 
•129 
349 
41 
11-72 
7 
6-8 
6-758 
6-6 
6-7— 8-9 
Orange. 
P. 
1846. Feb. 10. 
•110 
348 
23 
8-44 
14 
4-1 
6-664 
4-2 
7—9 
White and bluish. 
P. 
1847. Jan. 31. 
•082 
347 
12 
6-60 
23 
4-8 
6-642 
5 
7—9 
Yellow and blue. 
P. 
1849. Feb. 17. 
•129 
346 
39 
11-97 
7 
2-2 
6-714 
2-1 
6—8 
Y^ellow and bluish. 
P. 
uj Aurigse. 
1843. Sept. 8. 
•684 
349 
28 
11-46 
8 
7-4 
6-588 
7.4 
7 . 8 — 9.10 
White. 
G. 
16. 
•706 
350 
20 
14-.38 
5 
7 
6-367 
7 
7-8— 9-10 
White. 
G. 
24. 
•728 
351 
19 
10-55 
9 
7 
6-343 
7 
8—10 
White. 
G. 
1844. Sept. 25. 
•734 
351 
37 
12-30 
7 
6-6 
6-724 
6-7 
7-8—10 
Yellowish and light blue. 
P. 
26. 
•736 
351 
6 
13-43 
6 
6-9 
6-546 
6-6 
7-8—10 
Yellowish and light blue. 
P. 
Oct. 10. 
•775351 
19 
14-92 
5 
5-5 
6-539 
5‘6 
7-8—10 
Yellowish and light blue. 
P. 
1845. Sept. 22. 
•723 351 
4 
11-93 
7 
5-7 
6-229 
5-8 
7-8—10 
Yellowish and light blue. 
P. 
30. 
•745351 
59 
23-20 
2 
3-5 
6-384 
3-1 
7—10 
Yellowish and light blue. 
P. 
1846. Mar. 7. 
•178:350 
37 
9-35 
11 
4-8 
6-457 
4-8 
7-8—10 
Yellow and whitish. 
P. 
12. 
•192 
351 
37 
14-81 
5 
5-8 
6-442 
5-9 
7—10 
Yellow and white. 
P. 
13. 
•194349 
51 
13-15 
6 
4-8 
6-292 
4-9 
7— 9-10 
Yellow and blue. 
P. 
1847. Mar. 12. 
•192.351 
10 
12-52 
6 
5-6 
6-250 
5-5 
8— 9-10 
White and pale blue. 
P. 
24. 
•225|351 
35 
20-59 
2 
2-2 
6-297 
2-1 
7-8— 9-10 
Pale yellow and pale blue. 
P. 
* A power of 190 used. 
