100 
PROFESSOR A. SCHUSTER ON THE PERIODICITIES OF SUNSPOTS. 
Table VII.—Intensity of Periodogram for Periods of 30-I3'3 days. 
Period in days. 
1886-1890. 
• 
1890-1895. 
1895-1900. 
30 
840 
8 
13,560 
29 
830 
12,970 
15,240 
28 
600 
64,470 
3,050 
27-27 
7,640 
21,930 
410 
27 
2,210 
50,610 
2,550 
26-5 
2,990 
1,800 
2,000 
26 
1,430 
83,150 
3,860 
25 
240 
6,370 
4,640 
24 
1,130 
670 
1,440 
15 
170 
1,500 
220 
14-5 
280 
1,150 
570 
14 
100 
380 
270 
13-635 
300 
850 
70 
13-5 
270 
2,090 
50 
13-25 
100 
5,850 
1,320 
13 
100 
480 
710 
12-5 
50 
3 
760 
12 
240 
30 
850 
13-298 
— 
_ 
_ 
13-296 
— 
— 
-— 
Mean. 
General average. 
12,400 
10,240 
11,440 
520 
1,210 
360 
Table VIII. — Intensity of Periodogram, Values of A and B, and Phases of the 
26- and 27-day Periods for Separate Years. 
Year. 
Period of 
26 days. 
Period of 
27 days. 
A. 
B. 
</>• 
26 days. 
27 days. 
26 days. 
27 days. 
26 days. 
27 days. 
1886 
376 x 10 2 
856 x 10 2 
-24627 
-40513 
- 12679 
+ 12973 
207° 
162° 
1887 
157 
169 
+ 5292 
- 16363 
+17068 
+ 8062 
73 
154 
1888 
26 
17 
+ 1 
+ 5934 
+ 7222 
- 128 
90 
359 
1889 
75 
58 
3426 
+ 7075 
- 11855 
- 8062 
254 
311 
1890 
36 
82 
- 7821 
+10934 
— 3535 
- 7274 
204 
326 
1891 
1024 
994 
+ 12457 
+ 18437 
- 43946 
-41146 
286 
292 
1892 
1376 
407 
+ 29666 
- 29218 
- 43865 
+ 2340 
304 
175 
1893 
1202 
2899 
+ 4419 
+ 4639 
-49310 
- 75526 
275 
274 
1894 
2854 
1445 
+ 74603 
-54639 
+15907 
- 8310 
12 
189 
1895 
2007 
3645 
+ 37343 
+ 60644 
-51933 
- 59345 
306 
316 
1896 
62 
279 
- 11514 
+ 11137 
+ 1570 
-21563 
172 
297 
1897 
268 
372 
-22851 
+ 13126 
4903 
+ 23705 
192 
61 
1898 
901 
144 
+ 1208 
+ 333 
+ 42845 
- 17454 
88 
271 
1899 
13 
14 
+ 3968 
+ 4230 
3408 
- 3062 
319 
324 
1900 
67 
53 
+ 6396 
+ 902 
+ 9800 
- 10532 
57 
275 
7 JUL1906 
