%) 
Chase. | 402 [May 16. 
COMPARATIVE TABLE OF AURORAL AND Merroric DispLays. 
Jan. 3, 110K., W. Mar. 19, 144 June 2, 44 Aug. 16, 76 Oct, 30, 126 
8, 110 W. 24, 138 7, 44° W. 21, 88 Noy. 4, 120 
13, 114 29, 138 W. 12, 41 26, 95 9, LAL NY. 
18, 113 Aple 8, 188 di, 80 31, 102 Tay dad” Big We 
28, 110 8, 130 W. 22, 31 Sep, 5, 112 19) 127 Ws. 
28, 11 18, 131 27, 36 10, 123 W. 24, 113 
Feb. 2, 113 W. 19,115 Kis. Ws, July 2, 40 Dy sk Wy 2000 iis WW. 
gee. We 23, 94K. 7, 46 20, 138 Dec. 4, 115 W. 
12, 125 28, 79 12, 44 25, 142 2 ay 
d/; 1e3 Ky W. May 35-76 17, 40 W. 139 W. Si VV 
8, 66 22, 89K, Oct, 6, 133 W. 
13, 61 27, 45 K., W. 10, 129 
Mar. 18, 57 Ate. 1,40 IS, 4 WV. c 15, 129 K, 
2, 51 GO bl ig Wa 20, 133 K. 
28, 47 LLY 6010.7 WV: 25, 132 
The table, as well as the accompanying curve, exhibits the following 
peculiarities : 
1. The principal maxima occur near the equinoxes, and are apparently 
due to the favorable position of the earth for the development of circulat- 
ing electric currents. 
2. There is an evident grouping of meteoric displays in the vicinity of 
the maxima and minima. 
3. The grouping is more strongly marked upon the ascending, than om 
the descending sides of the inflections. 
£. 
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FER. | MAR. | APRIL 
i ifs 
ocr. nov. | DEC. 
4. The principal secondary maxima (in February, October, November 
and December), exhibit the most striking accordance. 
5. Nearly all of the apparent exceptions to this general accordance are 
occasioned by the rapid decline of the general curve, which is so great as 
to veil the subordinate maxima, when five-day means are taken. 
Of all the meteoric ordinates suggested by Kirkwood, including those 
which he regards as doubtful, three correspond with auroral minima, 
eight with increasing auroral displays, two with maxima, and only two: 
with ordinates of diminishing auroral frequency. The two exceptional 
ihanacaissiscions 
ee 
