42(^ DK. C. CIIREE; ANALYSIS OF EESULTS ETv’OM THE KFAY .HAGNETOGEAPHS 
Table XLV. — Values of Constants in Sun-Spot Formula. 
AVinter. 
E(|uinox 
Summer 
Y^ear 
Non-cyclic effect. 
A'ariability of 
declination in seconds of 
arc per minute. 
Horizontal force (unit I 7 ). 
Inclination (unit !')■ 
a. 
/)x lot 
{hja) X 10'^. 
a. 
7x lot 
(bja) X lO'^. 
a. b X 10^. 
(i/cp X lot 
1-50 
507 
338 
0-07 
470 
702 
3-00 289 
96 
2-77 
217 
78 
0-22 
90 
42 
3 • 32 240 
72 . 
2-10 
171 
81 
0-17 
124 
71 
2'49 188 
76 
2 • 12 
292 
138 
O'U 
251 
179 
2•93 239 
81 
§ GO. Tlie conclusions I myself draw from Table XL\. are that non-cyclic etiect and 
variability of declination are ])oth strongly Influenced Ijy sun-spot frequency, and that 
this influence is decidedly most prominent in winter, though hardly I should imagine 
to the extent indicated by the values found for hja in the non-cyclic eftects. 
(One exceptional feature in Table XLV. is that “ appears greatest, and hja least, 
at the equinox. This might arise from an over-estimate of “ o.” 
It will 1)6 noticed that the mean values for the year of b/« in non-cyclic eftect in 
IT and I, and in the varialiility in D, are remarkably close to the corresponding values 
found in Table XLTV. for the case of the 24 houiT}^ diflerences in these respective 
elements. 
When we find two phenomena presenting similar laws of variation, whilst the 
conditions are artificially varied in a definite manner, we infer at least an intimate 
relationship between their causes. Cue is thus tempted to deduce that the source, or 
sources, of tlie non-cyclic eftect is not ahsolutely distinct from that of the regular 
diurnal inequality. If, for instance, the inequality is due to electric currents in the 
upper atmosphere, one would be disposed to infer that the source of the non-cyclic 
eftect is there also. It seems improbahle that two absolutely distinct loci would be so 
similarly influenced by the changes, whatever they are, that proceed with 
sun-spot vaiiations. 
It is unsafe to l)ase theories on a few numerical coincidences, which after all may 
lie accidental, but I liope it will at least be allowed that non-cyclic eftect and 
declination variability are true manifestations of terrestrial magnetism, and that the 
plienomena they exiiilfit at different stations and over diflerent periods of time form 
rather a promising field of investigation. 
Relations ivitli Meteorological Plienomena. 
§ Gl. Evidence has been adduced, by many physicists, including Dr. Balfour 
Stewart and Sir . N.ormax Lockyeb, . suggestive,, of connection between sun-spots 
