﻿102 

 1902. 

 April 11. — Very faint aurora beams visible in S. and S.E. at between 2h. a.m. and 4h. a.m. Altitude 20° 

 Temperature, + 6° F. Clear sky. 



April 13. — At about midnight, M.T., aurora glow in E., about 5° above horizon. No beams visible; 

 intensity very weak and varying. Wind S.E., 4-5. Cloud 3, Ci.-s. 



April 15. — At noon, M.T., faint curtain of aurora stretching from magnetic E. to W., 10" above horizon 

 at extremity, and 50° at W. Centre of curtain within a few degrees of zenith. Movement 

 rather rapid. Intensity weak. Temperature, - 12° F. Wind S.E. true. Clear, but slight mist 

 partly obscuring stars. 



From above date luitil May 5 no sign of aurora was seen. During the latter part of April, 

 the blight moonlight possibly made it impossible to see, and during the first 5 days of May a 

 heavy storm blew from S. and S.W., and the drifting snow which accompanied it totally 

 obscured the sky. Ice in McMurdo Sound was driven out, and the open water advanced to 

 within a few hundred yards of the " Discovery." 



May 6. — An aurora was observed at 4h. a.m., M.T. The display extended from S. magnetic, round through 

 W. to N. magnetic. The most brilliant portion was in S. 15° W. magnetic and 20° in altitude. 

 Faint red was here visible at the base of the beams. A denser part of this totally eclipsed 

 stars of the 4th magnitude. The following are the altitudes : S. W. (magnetic) 40°, W. (magnetic) 

 30°, N.W. magnetic 60°, N. magnetic 20", E.N.E. magnetic 10°. Temperature at the time was 

 + 17" F. No clouds. Wind S.E., 2. 



May 7.— At 8h. 7m. p.m. faint aurora glow from N.W. by N. to W. 70° N. (magnetic). Streamers hidden 

 behind the hills, one in W. 10° N. magnetic visible 2" above summit of ridge. Temperature, 

 - 6° F. No clouds. Wind N.E., 4. 



Almost entirely disappeared at 8h. 45m. 



May 9. — 1. At 6h. a.m. faint streamers in W. and S.W. by W. magnetic, and faint-glowing aurora cloud 

 in S.S.W. magnetic. Temperature, - 16° F. Wind E. by N., 2. Clouds 4, Ci.-s. in W. 



May 9. — 2. At 9h. 7m. p.m., aurora arc at right angles to magnetic meridian position, as indicated on 

 chart. Altitude of centre, 4°; amplitude, 60°. Altitudes 9° and 14° to 15°. Aurora glow in 

 N.W. by W., from which beams from time to time emanated, light white with a tint of yellow. 



From 9h. 17m. p.m. to 9h. 22m. a very well-defined arc, perpendicular to meridian. Alti- 

 tude 9". Extremities as before, base sharp and dark beneath. Streamers above arc 10° to 15°, 

 extending from N.W. to E.N.E. magnetic. Intensity variable, very slow movement, more of a 

 glowing type. Too weak for spectroscopic observations. 



At 9h. .32m. p.m. arc was from 12° to 14° in altitude, extending from N. 20° W. to N.E. 

 Ijy N. (magnetic). Intensity varying greatly. At one time the distance l)etween arc and 

 streamers and beams was only about 1°, and a dark space lay between. 



At 9h. 42m. p.m. aurora arc had entirely disappeared, and only glow behind hill in N. 

 20° W. (magnetic) remained, and from which flashes of light would occasionally move up to 

 about 15°. When arc faded away its altitude was 14°. At times during the display a doubtful 

 appearance of the characteristic aurora line near D could be seen. Temperature, - 28" F. No 

 wind, no clouds. 



May 10. — At 8h. jj.m., M.T., aurora glow appeared in N.W. magnetic, from which streamers would 

 occasionally emanate. Amplitude of glow, W. 7" N. to N.W. l)y N. (magnetic). Altitude of 

 streamers not more than 5°. 



At 8h. 47m. p.m., bright patch in form of rough arc in N.W. magnetic. 



Display had almost entirely disappeared at 9h. p.m., only an afterglow remained. Tempe- 

 rature, - 6° F. No wind, no clouds. 



