﻿Ill 



1903. 



magnitude. The arc at the zenith very small but bright, with I'apid movement to N.W., the 

 other arcs increasing in amplitude. The lowest one extending from E., S.E., to S. Also two 

 streamers from N.E. 60° to zenith, and another short one from N.W. and near zenith. Wind 

 gusty from N.E., 1-3. 



Ih. 30m. a.m. Very similar display to that at Ih. Om. a.m. Streamers in N.E. longer 

 more disconnected and brighter. Patches of light in S. and S.W. 



2h. a.m. Very faint discoiuiected streamers visible all round from N.W. through E. to S.S. W., 

 the northern ones being the longest and brightest. Faint arc in S.E., about 12" altitude. Patches 

 about zenith. Movement still fast from E. to W., e.xcept in those to N., where the movement is 

 much slower. Wind N.E., 2-3. - 10° -5 F. 



2h. 45m. a.m. Very faint disconnected streamers in S. and S.W. from zenith. Brighter 

 streamers from zenith to 20° altitude in N.E., and moving slowly westward. Cloudless sky. 

 Wind N.E., 1-2. A few solitary patches of light near zenith. 



April 5. — Short, faint, vertical streamers from S.S.E. to S. by W., altitude of upper end about 40" 

 Cloudless sky. 



2h. a.m. One continuous streamer, from 30° altitude in S.S.W., through zenith. A faint 

 luminous patch in S.W., altitude about 50°. Temjjerature, - 10 ' F. Wind E, 2-4. 



April 7. — (Plate 12.) 2h. a.m. Very faint streamers in N.E, and S. Light from 30° to 70°. 



Midnight to Oh. 5m. a.m. on 8th. Two very bright rays in the N.W. magnetic, but they 

 lasted only a minute or so. There was a low arc of fainter rays, stretching from N. 20° W. to 

 N.E. magnetic. The bright rays started about 10° above the horizon and ended at about 

 20° altitude. The fainter rays reached no higher than 10° or 15°, starting from what looked 

 like a dark band of cloud in the N. magnetic. Wind N.E. true, 1-2. Clouds none. b. 

 Temperature, -21° F. 



April 8. — 2h. a.m. (see Plate 7). A confusion of vertical rays, arcs, scrolls, bands and banners covering the 

 sky from W. magnetic to E. magnetic, through N. magnetic up to zenith, where a corona was 

 twice formed. Movement, when apparent, from left to right, occasionally marked, but generally 

 indistinct. Rays, &c., changing rapidly in intensity, position, and amplitude. At one time the 

 zenith was crossed by a waving band from N. to S. Wind N.E., 1. Temperature, - 19° F. 

 Clouds nil. 



A few minutes after 2h. a.m., nearly the whole of the E. sky was lighted up by faint auroral 

 displays — luminous patches, rays, bands and disconnected arcs. The lateral movement of the 

 rays was not very rajjid, but, at times, perfectly distinct from N.E. to S.W. true, or, more 

 generally speaking, from E. to W. There was, however, a very perceptible and gradual movement 

 of the whole actively luminous display towards the zenith until at about 2h. 20m. a.m., a very 

 characteristic corona was there formed and lasted for several minutes, but at no time was there 

 any red or pink shown, the colour being a pale straw with tinges of green. Stars of the 4th 

 magnitude were visible through the brightest patches, but dimmed. It was impossible to note 

 any special rays or arcs, as they were so very confused and evanescent. The display commenced 

 in the S. true, gradually faded there, and appeared in the N.E. true. 



Amount of electricity in the air about normal. Barometer rising rapidly. 



4h. a.m. Bright greenish rays in the S. to S.E. magnetic, extending to 20° or 30° in altitude. 

 Faint rays all round to the N. and N.E. magnetic, becoming invisible in the faint light of the 

 rising sun. 



5h. a.m. Bright yellowish rays, forming an arc from N. to N.E. magnetic, 20° above horizon, 

 moving rapidly to various directions. The rays were quite distinct, notwithstanding a good deal 

 of light from the sun below the horizon. 



lOh. p.m. Faint yellowish rays of aurora, extending from N.W. by N. magnetic round to 



