Prof. E. Loomis on the Aurora of 1859. 
ginia is 71° 20’; and if we draw a line CD, 
angle of 71° 20’ with the curve line AB wh p 
tion of the earth’s surface, we may assume that the line CD 67 
f 
321 
figure 1, making an 
ich represents a 
T- 
resents the southern boundary of the auroral illumination. 
then we assume that the 
observations of Table I. were made upon 
the point D, we shall find that the u mu 
1 pper limit of the auroral 
light was elevated 534 miles above the earth’s surface, and shat 
its southern margin was 
north latitude in 
A 
. ob 
gi: 
ze 8 
St: 
3 * 
The following table presents a sum 
rva 
Virginia. 
Fig. 1. 
vertical over the parallel of 36° 40’ 
mary of the most definite 
Ad 
Observations of the aurora of Sept. 2, 1859, made gen 
about 2 a. wm. Havanna time. 
T 
Locality, 
a 
At Sea, 
LaUnion,SanSalvador 
SUD ce ee 
Am. Jour Sc1.—Srconp Szries, Vor. XXXII, No. 96.—Nov., 
41 
‘ABLE IIT, 
Lati- (Longi] Four, {Extent of auroral display.| Authority. 
112 93]88 28|miduight| Sky Iurid—wavy ap-|A. J. v.80, p. 361. 
18 18/87 45|10-8 aat| About 80° above the v. 29, p. 265. 
North horizon. 
18 44/88 55 Same as at La Union. vy. 29, p. 266. 
17 58/76 50| 1-5 am. Appeared like a colos- v. 29, p. 265. 
sal 
20 0/7610 Exten: upw y. 29, p. 265, 
about 72°. 
28 9/8229) 24.m. |More than 100° in v. 28, p. 405, 
eight. 
24 87/82 52| 2 aM ge beyond the y. 80, p. 360, 
zenith. 
29 30/82 18|2°80 a.m.|Corona very di v.80, p. 360. 
3015/82 0| 34.m. |Extreme south in a v. 80, p. 359. 
red glow. 
8050\84 0| 2 a.m. |Corona form vy. 30, p. 358, 
82 20/89 20|2°10 a.m| Whole visible heav- v. 80, p. 357. 
ens overspread. 
89 55)86 5 Down to south hori- v. 28, p. 398. 
zon. 
48 8/7751] 24.™. |Down to south hori- y. 29, p. 253. 
zon, 
1861. 
