425 
OX 
“ QITIET ^ 
DAYS DURING THE ELEVEN VEAL'S Ls')0 TO 1900, ITLC. 
slightly the larger, Avhile the values of hla Ibr II and N also ditfer but slightly, and 
in the same direction in the two cases. 
Coining now to the results for Parc St. Maur, we see that the values for “ a” are 
all in excess of the corresponding values for Kew, but the values of h/a at the two 
places are in general closely alike, the difference being sometimes in one direction, 
sometimes in the other. The agreement in the values of l>ia at the two places is 
closest in H and N, and least close in I. The fact that at Parc St. Maur V shows a 
slightly larger value of h,'a than D is noteworthv. 
On the whole, the similarity in the phenomena shoAvn at Koav and Parc St. Maur 
is exceedingly satisfactory. The resemblance appears decidedly closer than between 
Keav and Wilhelmshaven. This is proliably partly due to the fact that the decli¬ 
nations at Parc St. Maur and Keav differ only about 2°. 
§ 58. fable XLIV. gnes a final set of results from the mean djurnal ineijualities 
for the year, lliey Avere olitained from the indiAUtlual inequalities for 11 or 10 years 
by least squares. The agreement Avith the results in Tal)le XLIII. is good. This is 
satisfactory, if only because it sIioaas that it is possible to olitain ly means of the 
much simpler method of Table XLIll, results giAung a good approximation to those 
found by least squares. 
I ABLE XLI\.—A allies of Constants in Sun-Spot Formula from Mean Diurnal 
Inequalities in Indiyidiial Years by Least Sq uares. 
4 ilifferences. 
Ranges. 
(f. 
/-X 104 
(Y') X10'. 
0, 
hx lot 
(h/a) X 10'. 
Declination . . . (unit T) 
30-5 
264 
87 
6-10 
433 
71 
Inclination ... „ ,, 
4-63 
SI 
175 
0-87 
125 
145 
Horizontal force (unit ly) 
97 • S 
1.3.58 
139 
18-1 
1942 
107 
Vertical force ..,,,, 
77-0 
439 
57 
14 •3 
806 
56 
years Avere grouped after the fashion 
^ 59. I haA'e also applied tlie sun-s].ot formula to the lesults for non-cychc effect iii 
I and H giyen in Tables \ I. and Yll., and to the monthly results obtained for the 
variability of I) as explained in § 39. The 
ex])lained in § 52. 
I he results are given in Talile XLV. for the Ai’liole A"ear, and for the three seasons. 
()Aving to the extreme smallness of the oliseiwational quantities, it Aroiild require a 
A'ery long series of years to eliminate accidental sources of error. Thus the seasonal 
results, more }mrtlcularly for the non-cychc effect, are probably affected by consider¬ 
able uncertainties, especially as regards the Audiies of hja. In fact, my object in 
recording the seasonal \mlues Avas largely to enable the reader to judge for himself 
what attitude he should adopt towards the mean results for the year. 
VOL. ecu.—A. .3 I 
