121 
discovery of the star’s variability in 1859 to the end of 
1879 is as 
follows : — ’ 
No. 
Date. 
Mag. 
Days 
in 
Interval. 
Number 
of 
Periods. 
1 
1859, Oct. 27 
9*8 
2 
1860, Jan. 7 
9-6 
72 
1 
3 
„ May 31 
9-7 
145 
2 
4 
Aug. 7 
lOd 
68 
1 
5 
„ Oct. 19 
10-3 
73 
1 
6 
„ Dec. 27 
10-0 
69 
1 
7 
1861, May 1 
10-0 
141 
2 
8 
„ July 25 
9-7 
69 
1 
9 
„ Oct. 8 
9*7 
75 
1 
10 
„ Dec. 17 
10-0 
70 
1 
11 
1862, July 15 
9-7 
210 
3 
12 
„ Sep. 19 
9*2 
66 
1 
13 
1863, July 4 
9*5 
288 
4 
14 
„ Sep. 11 
9-7 
69 
1 
15 
„ Nov. 18 
9-6 
68 
1 
16 
1864, June 19 
10-1 
214 
3 
17 
„ Aug. 30 
10-0 
72 
1 
18 
„ Nov. 6 
9*4 
68 
1 
19 
1865, June 4 
9-7 
210 
3 
20 
„ Aug. 15 
9*7 
72 
1 
21 
„ Oct. 23 
9-8 
69 
1 
22 
1866, May 25 
9-7 
214 
3 
23 
„ Aug. 2 
10-0 
69 
1 
24 
„ Oct. 12 
9-8 
71 
1 
25 
,, Dec. 22 
9-7 
71 
1 
26 
1867, Sep. 28 
9 ‘8 
279 
4 
27 
„ Dec. 5 
9-9 
68 
1 
28 
1868, July 5 
9-3 
213 
3 
29 
„ Sep. 12 
9-3 
69 
1 
30 
1878, Aug. 19 
9-1 
3628 
52 
31 
,, Oct. 30 
9*6 
72 
1 
32 
1879, Jan. 10 
10-1 
72 
1 
33 
5 ? Aug. 5 
9-9 
207 
3 
34 
,, Oct. 15 
10-0 
71 
1 
35 
„ Dec. 24 
9-8 
70 
1 
