38G DE. C. CHREE; ANALYSIS OF RESULTS FROxM THE KEW MAGNETOGEAPHS 
Table XXII.—-Coefficients and Angles in Fourier Series Expansion 
Period, 24 hours. 
Period, 12 hours. 
ai. 
h. 
Cl. 
aj. 
(Zo. 
h. 
C2- 
X2. 
January .... 
+ 2-70 
+ 1-06 
2-90 
6°8 32 
-3-73 
+ 0-47 
3-76 
277 15 
February .... 
+ 4-77 
+ 0-37 
4-79 
85 36 
-3-44 
0-00 
3-44 
269 58 
March .... 
+ 8-65 
- 1-72 
8-82 
101 14 
-4-99 
+ 2-15 
5-44 
293 17 
April. 
+ 12-17 
- 4-38 
12-94 
109 48 
-6-85 
+ 3-04 
7-49 
293 56 
May. 
+ 11-74 
- 9-51 
15-11 
129 1 
-4-32 
+ 4-23 
6-05 
314 23 , 
June. 
+ 10-75 
- 10-26 
14-86 
133 39 
-4-56 
+ 4-18 
6-19 
312 29 : 
July. 
+ 11-31 
- 9-70 
14-90 
130 38 
-5-06 
+ 4-39 
6-70 
310 57 
August .... 
+ 11-72 
- 8-67 
14-58 
126 29 
-3-39 
+ 5-10 
6-12 
326 21 
September 
+ 10-77 
- 6-55 
12-61 
121 18 
-2-64 
+ 5-14 
5-77 
332 50 
October .... 
+ 9-82 
- 1-83 
9-99 
100 32 
-5-27 
+ 2-41 
5-80 
294 35 ; 
November 
+ 5-45 
- 0-30 
5-46 
93 11 
-5-12 
+ 1-40 
5-31 
285 15 ‘ 
December 
+ 1-43 
+ 0-75 
1-62 
62 18 
-3-07 
-0-07 
3-07 
268 38 1 
Mean of 12 monthly 
values . 
+ 8-441 
- 4-229 
-4-370 
+ 2-702 
Inequality for— 
Year . . 
9-443 
116 37 
5-138 
301 44 
Winter.... 
+ 3-588 
+ 0-469 
3-619 
82 33 
-3-840 
+ 0-448 
3-865 
276 39 
Equinox . 
+ 10-353 
- 3-619 
10-967 
109 16 
-4-937 
+ 3-184 
5-875 
302 49 
Summer . 
+ 11-381 
- 9-536 
14-849 
129 58 
-4-334 
+ 4-474 
6-230 
315 55 
Table XXIII.—Coefficients and Angles in Fourier Series Expansion 
Period, 24 hours. 
Period, 12 hours. 
ai. 
hi. 
Cl- 
(Xi. 
h- 
CCo. ! 
January .... 
+ 0-80 
-2-43 
2-56 
161 43 
-1-15 
+ 0-71 
1-35 
301 36 
Feljruarv .... 
+ 1-53 
-2-80 
3-19 
151 27 
- 1-99 
+ 0-60 
2-08 
286 51 
March. 
+ 4-97 
-2-84 
5-10 
119 43 
-4-64 
+ 0-13 
4-64 
271 36 
April. 
+ 6-99 
-2-71 
7-50 
111 12 
-5-90 
-0-62 
5-93 
264 1 
May. 
+ 9-12 
-3-78 
9-87 
112 30 
-7-69 
+ 0-57 
7-71 
274 15 i 
June. 
+ 6-75 
-5-11 
8-46 
127 8 
-6-07 
- 0-02 
6-07 
269 46 
. 
+ 7-55 
-5-89 
9-58 
127 57 
-6-15 
-0-51 
6-17 
265 14 
August .... 
+ 5-96 
-3-34 
6-83 
119 16 
-5-89 
+ 0-76 
5-94 
277 24 
September . . . 
+ 5-88 
-3-08 
6-62 
117 44 
-4-86 
+ 0-90 
4-94 
280 32 
October .... 
+ 4-12 
-2-50 
4-82 
121 13 
-3-39 
+ 0-13 
3-39 
272 15 
November . . . 
+ 0-96 
-2-34 
2-53 
157 38 
- 1 -50 
+ 1-23 
1 94 
309 28 
December. . . 
+ 1-09 
-1-25 
1-66 
138 54 
- 1-12 
+ 0-81 
1-38 
305 42 
Mean of 12 monthly 
values . . 
+ 4-64 
-3-17 
-4-20 
+ 0-39 
Inequality for—■ 
Year .... 
5-62 
124-21 
4-21 
275 19 
Winter.... 
+ 1-10 
- 2-21 
2-46 
153-.35 
- 1-44 
+ 0-84 
1-67 
300 11 
Equinox . . 
+ 5-49 
-2-78 
6-15 
116-53 
-4-70 
+ 0-14 
4-70 
271 40 
Summer . . . 
+ 7-34 
- 4-53 
8-63 
121-40 
-6-45 
+ 0-20 
6-45 
271 47 
