\ Phil. Trans. 1880 .Plate 2.2.. 
Smoothed. Curves of Sujv spot Frequency (Wolf) compared, with, corresponding curves showing the. Variation/ in, the. Diurnal, Fiomge, of the- Magnetic Elements. Destination, and, Horizontat Force , cos 
deduced, from observations made at the Royal Observatory, Greenwich. 
I : 
• ^ 
* I 
. s 
c -i 
-3 7 
? a 
£ = 
= c 
140 
— 
130 
Susv spot 
curve 
110 
100 
Sure s 
Curv 
oot \ 
k 
i £ 
90 
/ S vc 
V Spot 
cu,rve 
80 
/ 
70 
60 
Dectimxtio ; 
V 
j DecHi 
/ Cu 
action, 
we 
50 
40 
30 
20 
10 
0 
1 
-P 
o 
8- 
4 
V. 
•i 
! 
I -^c - 
(j»- s 
curve 
WWW. 
wo 
J 
j 
DecHrux, 
tion, cvuv 
10 
X - x 
/ 
\ 
f 
/ Horizon 
ta.1 \ 
g 
Horizontal 
/ Hon 
Force 
iontaL 
curve. 
Force C 
uve Y 
/ 1 
orce cun, 
e, y. 
/ 
- 
xw 
V- 
|R 
IS 41 18 42 
1843 
1844 
1845 
, 1846 
| 18 47 
184 8 
1849 
1850 
18 51 
1852 
18 53 
1854 
1855 
1856 
1857 
1858 
1859 
i860 
1861 
1862 
18 63 
18 64 
18 65 
1866 
18 67 
1868 
1869 
1870 
18 71 
1872 
1873 
1874 
1875 
1876 
1877 
Year 
West Nt w>turn, t C° sc. 
