214 
DR. C. CHREE: MAGNETIC DECLINATION 
omitted here. Table V. contains, however, diurnal inequalities calculated from the 
whole year and the three seasons, viz., winter (November to February), summer (May 
to August), and equinox. 
Table V.— Diurnal Inequality. Ordinary Days. 
Season. 
Forenoon. 
Hour .... 
1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
12. 
r 
Sunspot minimum. . . 
/ 
-1-08 
-101 
-1-08 
/ 
-1-29 
/ 
-1-62 
/ 
-1*92 
/ 
-2'21 
/ 
-2-31 
/ 
— 1 '75 
/ 
-0'16 
/ 
+ 1-96 
/ 
+ 3'73 
Year . . \ 
11 years. 
-1-48 
-1-45 
-1 '52 
-1-71 
-2-C6 
-2-39 
-2-67 
— 2 '77 
— 2 '12 
-0-28 
+ 2'20 
+4'35 
l 
Sunspot maximum . . 
-1*84 
-1-90 
-1-98 
—2 '17 
-2-54 
-2-93 
-3-23 
— 3 31 
—2 '57 
-0'44 
+ 2'42 
+ 4-97 
r 
Sunspot minimum . . . 
-0-90 
-0-64 
-0-52 
-0 51 
-O'o2 
— 0 *55 
-0-59 
-0 69 
-0-58 
+ 0-30 
+ 1 '57 
+ 2'54 
Winter . -j 
11 years. 
-1-37 
-1-07 
-0-90 
-0-82 
-0-81 
-0-81 
-0-81 
-0-94 
-0'86 
+ 0'13 
+ 1-62 
+ 2'92 
l 
Sunspot maximum . . 
-1'79 
-1-50 
.-1 '29 
-1-16 
-1-10 
-109 
-1'09 
- 1-28 
-1-27 
-0-09 
+1 '72 
+ 3'36 
r 
Sunspot minimum. . . 
-1-24 
-113 
-1-27 
-1-37 
-1-47 
-1-66 
-2'17 
- 2-75 
-2'30 
-O'oO 
+ 2-08 
+ 4'34 
Equinox . ■{ 
11 years....... 
-1-67 
- 1-64 
-1-71 
-1-80 
-1-90 
-2-14 
-2-67 
-318 
— 2'60 
-0'51 
+ 2-49 
+ 5 "07 
{ 
Sunspot maximum . . 
-2-05 
-2-13 
-2-20 
-2-28 
-2-39 
-2'70 
-3-26 
- 3-73 
-3-05 
— 0 '65 
+ 2'76 
+5'72 
f 
Sunspot minimum. . . 
-1-09 
-1-25 
-1-46 
-1-99 
-2-87 
-3'54 
-3 87 
-3’48 
-2'37 
-0'27 
+ 2'24 
+4-45 
Summer . -( 
11 years. 
-1'39 
-1'64 
-1-95 
-2-50 
-3-46 
— 4 '22 
- 4-53 
-4-20 
-2’90 
-0'46 
+2'49 
+ 5 *07 
[ 
Sunspot maximum . . 
-1-68 
-2*05 
-2-45 
— 3 "06 
-4'12 
-5-01 
- 5-33 
-4'91 
-3'40 
-0'59 
+ 2'75 
+ 5'82 
Season. 
Hour. . . 
Afternoon. 
Range. 
Sum of 
24 
differences 
from 
mean. 
1. 
2. 
3. 
4. 
5. 
6. 
7. 
8. 
9. 
10. 
11. 
Midt. 
r 
Sunspot minimum 
+ 4-44 
+ 3-93 
/ 
+ 2 *75 
+ 1-58 
+ 0-71 
/ 
+0-17 
-0'20 
-0'53 
/ 
-0*84 
-1-05 
-115 
-1'14 
6'75 
/ 
38 *66 
Year . ■{ 
11 years .... 
+ 5'26 
+4-90 
+ 3-70 
+ 2'35 
+ 1-21 
+ 0-41 
-0'16 
-0-60 
-1-00 
-1-27 
-1-42 
— 1 50 
8'03 
4S-78 
l 
Sunspot maximum 
+ 6 13 
+5-91 
+ 4-62 
+ 3-05 
+ 1-64 
+ 0 *65 
-0-06 
-0'62 
-1'06 
-1-37 
-1-61 
-1'77 
9'44 
58-79 
r 
Sunspot minimum 
+ 2-83 
+2-19 
+ 1-27 
+ 0'70 
+0'39 
+ 0'02 
-0-33 
-0-77 
-1'21 
-1-38 
-1-36 
-1'20 
4'21 
23-61 
Winter ■{ 
11 years .... 
+ 3'45 
+3-03 
+2'17 
+ 1'43 
+ 0-86 
+ 0-31 
-0'26 
-0-84 
-1-38 
-1-68 
-1-73 
— 1 *65 
5-13 
31 -85 
{ 
Sunspot maximum 
+ 410 
+3'89 
+ 2'98 
+ 2'04 
+ 1-23 
+ 0'61 
-O'lO 
-0'84 
-1'47 
-1-85 
-2 01 
-2'00 
6-11 
39-86 
[ 
Sunspot minimum 
+ 5 19 
+ 4 '54 
+ 3-10 
+ 1-57 
+ 0*55 
+ 0'08 
-0'26 
-0'62 
-0'94 
-1'18 
-1-31 
-1-32 
7*94 
42'94 
Equinox 
11 years .... 
+ 614 
+ 5 *63 
+ 4-12 
+ 2'38 
+ 1-04 
+ 0'23 
-0-35 
-0-82 
— 1 *22 
-1-51 
-1'66 
— 1 71 
9-32 
54 -19 
i 
Sunspot maximum 
+7-10 
+6-71 
+ 5-10 
+ 3'17 
+ 1*51 
+ 0'46 
-0'31 
-0'88 
-1'34 
-1'65 
-1-87 
-2'00 
10 'S3 
65-02 
r 
Sunspot minimum 
+ 529 
+5-06 
+3-89 
+ 2'46 
+ 1 '20 
+ 0*42 
+ 0'04 
-0'20 
-0-36 
-0'59 
-0'77 
-0'90 
9-16 
50-06 
Summer { 
11 years .... 
+ 6-18 
+ 6'03 
-t- 4 *82 
+ 3'23 
+ 1-74 
+ 0'68 
+ 0'12 
-0'15 
-0'39 
-0'61 
-0'87 
-1-13 
10-71 
60 *76 
i 
Sunspot maximum 
+7'19 
+ 7'13 
+ 5 *78 
+ 3'95 
+ 2-19 
+ 0-88 
+ 0'22 
-0-13 
-0'36 
-0'60 
-0-95 
-1-31 
12-52 
71-89 
All maximum and minimum values which are distinctly shown appear in heavy 
type in Tables III. and V. ; but in Table IV. only the absolutely largest and least 
values are thus indicated. 
