34 SCIENTIFIC RESULTS OE ZIEGLER TOLAR EXPEDITION 



December, 1903. 1:12:22, overcast. 2:01:14, slowly decreasing after this reading; 

 2:02:06, 80 per cent thin clouds; 2:03:40, clear, calm, moonlight night; 2:03: 58, increased 

 to54 d .2; 2:05:50, clear, moonlight, no auroral light; 2: 05: 54. i, 30 seconds for this oscilla- 

 tion ; 2:07:40, aurora extending from zenith to within 10 of horizon from north to west 

 through zenith ; 2:07:58, aurora from northeast through zenith; 2:08: 18, aurora has almost 

 disappeared ; 2: 08: 24, aurora grows stronger from zenith to northeast and southwest ; 2: 08: 46, 

 aurora very faint ; 2: 09: 02, aurora has practically disappeared ; 2: 09: 10, aurora grows stronger 

 in southwest, has disappeared in northeast ; 2: 10:06, aurora has disappeared ; 2: n: 54, faint 

 aurora northeast to southwest through zenith ; 2:12: 22, aurora extending from zenith in all 

 directions, chiefly northeast and southwest, strongest in southwest ; 2: 12: 34, aurora in band 

 from northeast to south 15 above horizon, also faint patches in southwest ; 2: 12:42, aurora 

 has almost disappeared in southwest ; 2:12: 50, aurora very faint ; 2: 13: 10, aurora has disap- 

 peared ; 2:16:58, 50 per cent clouded, no aurora; 2:18:04, 75 per cent clouded; 2:21:58, 

 aurora in band from east to west through zenith, stronger in east ; 2: 22: 06, aurora has dis- 

 appeared. 4:20:00, moon visible through clouds during most of observations, very well 

 defined halo. 6:00:44, decreased to 26d; 6:01:38, 90 per cent thin clouds; 6:03: 12, sky 

 overcast entirely; 6:05:50, clear sky. 7:08:00 moon has ill-defined halo, no aurora; 

 7: n: 24, very faint aurora in vertical stripes from horizon up to 15 ; 7: 11:48, aurora just 

 starting in northwest and north-northwest, one vertical stripe in each direction, 15 long, half 

 way between horizon and zenith. 8: 14: 22, aurora in several bands from northeast to south- 

 west through zenith; 8:14:34, aurora growing stronger to eastward; 8:14:46, aurora has 

 almost disappeared ; 8: 15:06, aurora grows stronger to the eastward ; 8: 15: 18, aurora grows 

 weaker in the east ; 8: 15: 28, increased to 36 d .g ; 8: 15: 38, aurora in well-defined arch from 

 northeast to southwest, vertex of arch in southeast 15 above horizon ; another arch later ap- 

 peared above the first vertex southwest 50 above horizon. 9:00:00, aurora during axis 

 observations; 9:02:16, wind rises; 9:03:32, high wind ; 9:05:48, increasing, but stopped a 

 moment here; 9:08:02, shoveling snow from entrance, no time for observers to alternate; 

 9:10:10, calm; 9:10:48, wind rises; 9:14:14, shoveling snow from entrance, stopped at 

 14: 24 ; 9: 18: 22, shoveling snow from entrance ; 9: 20: 48, had to check needle with steel pin. 

 10:17:10, increased to s6 d .2 ; 10:17:14, decreased to 53 d . 7. 16-16:38, shoveling snow 

 from entrance ; 16:16:50, no time for more alternation on account of drift against door of 

 hut; 1 6: 21 : 30, checked with steel pin one minute before observation; 16:22:50, checked 

 with steel pin one minute before observation. 17:16:00, partly cloudy. 18: 22: 20, aurora 

 in snake-like clouds and streaks from southeast to southwest 20 above horizon, constantly 

 changing position and shape; 18:22:32, aurora forms arch from east to west through 

 zenith, also streak from south to west 15 above horizon ; 18: 22: 58, aurora growing weak ; 

 18: 23: 12, aurora in streaks southwest to west 15 above horizon ; 18: 23:42, aurora has dis- 

 appeared. 21:08:08, aurora from zenith to northeast to north; 21:08:42, aurora has 

 disappeared. 22:12:00, had to dig out entrance. 23: 03: 37, decreased to 33d; 23:03:50.2, 

 30 seconds for this oscillation; 23:07:32, 40-mile wind and drifting snow, had to dig out 

 entrance; 23:12:52, aurora from northeast to southwest through zenith; 23:13:48, faint 

 auroral light in north ; 23: 14:56, had to dig out entrance; 23: 15:04, ten auroral streams 

 from northeast, not very bright ; 23: 18: 16, clear ; 23: 21: 28, very faint aurora, streaked north- 

 east to southwest ; 23: 21 : 34, aurora growing considerably brighter in east ; 23: 21 : 40, aurora 

 has mottled appearance in east, practically gone in west; 23:21:56, aurora has disappeared 

 entirely in west and increased in east, with vertical streamer from horizon to zenith in east and 

 mottled appearance in south ; 23: 22: 02, aurora has very much diminished to one small spot in 

 northeast, with mottled appearance in southwest increasing ; 23:22:08, checked motion with 

 steel pin ; 23: 22: 24, aurora has disappeared ; 23: 22: 36, aurora east to west through zenith, 



