Table VIII.—Monthly mean diurnal range of horizontal force, and annual inequality of diurnal range as referred 
to the mean inequality, at epochs of sun-spot minimum and maximum. (The unit is ‘00001 of the whole 
horizontal force.) 
RANGE AND THE PERIOD OE SOLAR SPOT FREQUENCY. 
MDCCCLXXX. 
c3 
<D 
Mean. 
HOHHffiOOiOHCOHCOIN 
+ + + + + + + + + + + + 
17 
a 
© 
o 
G 
G 
O 
1- 
CO 
rH 
CDMOiCOCOHHHHUOHH 
CC O Oi O) C-l O O D CO H 
rH rH 
I + + + + + + + + + + + 
16 
T5 
© 
<2 1 
CD Qh 
Sh OT 
'k 
§ 
o 
CO 
CO 
(NlOCOOJOOOHCOlMO't 
CU H O CO (MNHNN 
H rH rH 
+ + + +I + + + + + + 
15 
«? ri 
C3 ^ 
CD ® 
CD©-. 
C o 
£3 go 
cd 
pH 
CO 
(N050CDCO OCOHlOtOHH 
HCDMIOHIMCOIMIMHHH 
+ + + + + + + + + + + + 
14 
o 
c3 o 
G a, 
3 ® 
HO c3 
Mean. 
NH(MOCOOOCl-tNOlM 
1 1 1 1 1 1 1 I I 1 1 1 
13 
©-H 
o 
e3 
2 c - * 
D <D 
Minimum. 
r- 
CO 
CO 
lOCOHDdOQCUMlOtOCO 
rOUOHC'l'H'HHCO'HHCO'H 
I 1 1 1 1 1 1 1 1 1 1 1 
12 
CT* C 
<D "H 
.s 
g 
1856. 
(M H H 1- f£) © (M LO 1C OO H D 
r—i H rt 1 CO Ob CO 02 lO CO CO CO 
+ IIIIIIIII+ + 
3 
1843. 
COOHHOOMO)HO(MOC5 
COUO'HOI rH CO XO <M 
I I 1 1 + 1 1 + + + 1 I 
01 
Monthly 
mean for 
whole period, 
1841-1877. 
lCOOHHOCO(MCDMCOM0 
CO^OGCOGNLOCOadlH 
HH(M(M^(MC4CUMHHH 
02 
Mean. 
ONIOCOIOHNGOOCOCO 
DOCO^HtNCO OOJfMCO H 
HCDMCOCOCOCCCKNNHH 
CO 
© 
P4 
m 
g 
a 
O 
CO 
COOOODNWWCOCODN 
CO CO CO Ip CO 02 ip H O CO CO CM 
H H (M CO CO CO CO CO CO CA H H 
X- 
d-H 
o 
OT 
O 
o 
‘m 
c3 
*5 
1860. 
NCONWOMNCOOOWO 
VO CO O H CO 1— i—! H rH <02 
(MINCOCOCDNCDMCOdClH 
co 
12 
03 
© 
bfi 
G 
CO 
rH 
CO 
rH 
NNHONCOOCOSCONN 
^ MM CO H O CO MO H U5 (M 
HH(MMCONCOCUM(NhH 
XO 
o3 
H 
2 
G 
t* 
.2 
Mean. 
conocococowcocohn^ 
O O lO CM O-l CO C-l CO O CO H O 
HHH(N(N(NIM(N(MrHH 
■"H 
G 
c3 
© 
JVIinimum. 
1867. 
ooot^t^cocooocot-co 
ODOCOHClCOCKMacOOD 
riCDMClClC'lHHH 
CO 
2 
"a 
o 
§ 
1856. 
NNNNCOGONNOOCO 
HCOU2CONCOOClO)COlOiO 
rH rH rH rH rH CCJ ,—| rH i—1 H —i H 
OJ 
CO 
"H 
CO 
NCOOONCCOCCDOCON 
02 02 CO *0 fp- CO CO CO CO O 02 CO 
H (M Cl (M (M (M (M (M 
- 
Month. 
January. 
February . 
March ....... 
April. 
May. 
June. 
July. 
August . . . . . . 
September. 
October. 
November. 
December. 
Number of column . . 
4 C 
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