Phil. Trans. 1880 .Plate 24 . 
(findtiv Mean Diurnal Ranac of Declination 
Curves showing the. Monthly Mexuv Diurnal Range of the Magnetic Elements, Declination- and Horizontal Force, and their Annncd- Inequalities, as referred to the Mean 
Inequality at the Epochs of Sun spot Muiurwm and Maocimum, as deduced from Observations male od the Royal Observatory, Greenwich; also the corresponding curves given by the Sun 
Spot numbers. 
Kg- 2. 
It Mean Diurnal Mange of Horizontal Force. 
Fig. 3. 
T 
r 
I 
4 
\ 
\ 
1 . 
, L 
/y 
J 
V 
v 
\ 
v- 
.1 
J870 
1861 
if _ 
10 
/y 
\d 
Jan. 
Fiq 4 
Aruuuxl Imuf uoZZty of Diurnal Manges of Declination, an referred’e to the Mean Inequality. 
— s 
184-8 »n«je 
VS,, 
A 
H 
1860 vtuxx,. 
SE; 
Jan. 
Dec. 
Fig 5 
Jan. 
Dec. 
Fiq. 7. 
Fig. 8. 
Amuixdv Inequality of Diurnal Range of Horizontal Forcer, cos referred, to the Mean Inequality. 
+■0006- TO 
.Mian, 
i aural • 0000 - 
Jan 
1 o 4 -J mwtys. I 
i- 0oo9 - 
b-ooo6 - 
t-ooo3 - 
■oooo'* 
1870 mum, 
Ian. Dec. 
1867 i 
-■0003 - 
— OOO 6 - 
■0000 - 
— ooo3 _ 
— -ooo6 - 
Mean. vYuxtr 
i 
Jan. 
Mean mill-. 
Dec. 
! 1 U/k|^N. 
:FlITSl . 1 
Fig. 13. 
Fig. 14. 
Fief. 15. 
Fi q. 16 . 
Fiq. 11 
den*' Sure Spot number 
ie*e 
< 
?S43 
0 1 
Fig 18 
\/ 
H 
1 J 
\ 
1= 
— 
±: 
in 
it 
Jon. 
Fiq. 20. 
Annual Inequality of Sun, spot number, as referred to the Mean, Inequality. 
j 184-8 mo. oe. 
Jan Dec. 
184-3 min,. 
. Fi cj. 21 
Jar- ws6 ^ Ike. 
Fici. 22. 
F.j!3 
— 
! 
t 
- 
- 
Fi <j. 24 
Wiol Nte/num l C« se ,.tL -v 
