3 6 SCIENTIFIC RESULTS OF ZIEGLER POLAR EXPEDITION 



from zenith northeast to south, snaky streamers with transverse rays; 13:22:38, aurora 

 extremely faint ; 13: 22:44, aurora grows stronger; 13:22:56, aurora very faint ; 13:23:16, 

 78*. 7 estimated; 13:23:36, aurora growing faint. 15:20:00, clear sky; 15:21:32, hazy 

 along horizon; 15:21:38, overcast. 17:00:00, overcast. 19:12:00, one fiber of the sus- 

 pension broken during observations this day, but it apparently does not touch tube. 

 20:00:00, broken fiber removed before observations, magnet remaining suspended by but 

 three fibers ; 40 mile wind from southeast, drifting snow; 20:00:26, magnet checked with 

 adjusting pin ; 20: 07: 46, shoveling snow from entrance ; 20: 17: 04, very faint aurora in spots 

 west to south 10 above horizon; 20:18:18, overcast; 20:20:22, calm. 22, observations 

 omitted this day on account of blizzard, wind being 60 to 70 miles per hour. 23:20:00, 

 partly cloudy ; 23: 21: 36, aurora in irregular band from east to south and from horizon to 10 

 above horizon ; 23:21: 46, aurora growing stronger and moving considerably ; 23: 22: 06, strong 

 aurora from zenith to horizon northeast to south, stronger in east and moving rapidly ; 

 23: 22: 14, aurora from zenith in all directions, moving rapidly; 23: 22: 24, aurora fainter, it is 

 now in the northeast and southwest to south ; stronger in southwest to south, where it consists 

 of snaky clouds ; 23:22:46, aurora fainter; 23:22:58, aurora in irregular moving circular 

 streaks having their centers in zenith ; 23: 23: 18, aurora in irregular, snaky streak from zenith 

 to northeast and southwest ; 23: 23: 34, aurora in irregular streaks and spots in all parts of the 

 sky; 23:23:56, scale decreases, stopped here and then continues to decrease. 24:02:22, 

 wind rising ; 24: 03: 46, foggy, except in zenith ; 24: 05: 18, wind light ; 24: 06: 30, calm, cloudy, 

 Snow. 25:08:00, overcast. 26:12:00, partly cloudy, wind southeast, velocity 35 miles; 

 26:13:20, calm. 27:00:00, clear, moonlight night, light wind, no aurora; 27:10:36, 

 hazy 10 above horizon; 27:12:00, sky hazy; 27:14:18, sky clear, except in the south; 

 27:14:56, scale decreases; 27: 16: 14, calm, clear, moonlight; 27:19:30, thin clouds, stars 

 and moon visible, light wind from east ; 27: 19:50, instrument slightly out of level ; it was 

 probably leveled by striding level which appears level at present but probably has thin snow 

 particles on axis; instrument not disturbed by attempting adjustment since level but slightly 

 out ; fiber hangs free in center of tube ; 27: 21: 40, magnet starts from its quiet phases ; calm, 

 moonlight, faint clouds all over sky but stars visible through them ; 27: 22: 30, scale suddenly 

 increases to this : 27: 24:02, striding level taken off, cleaned, reversed and found to be in good 

 adjustment ; the plate level is slightlv out of adjustment ; the wves appear clear. 28: 16:00, 

 plate level adjusted before observations began; 28: 1 6: 12, very faint aurora northeast from 

 horizon to zenith ; 28: 16:54. aurora has disappeared ; 28: 17:06, very faint aurora in south- 

 west, zenith to horizon; 28: 17:46, aurora has disappeared; 28:18:56, aurora in irregular 

 horizontal streak south to southwest 10 above horizon ; 28: 19:04, no aurora ; 28: 19: 26, after 

 this scale increased to 32*.8 ; 28: 19: 36, aurora in irregular horizontal streak northeast to east 

 10 above horizon ; 28: 19:44, aurora northeast zenith to horizon ; irregular horizontal band 

 southeast to south-southwest 10 above horizon; 28:19:52, aurora stronger from zenith in 

 all directions northwest to southwest, horizontal streak northeast 10 above horizon. 31, 

 magnet was dropped on floor in afternoon ; 31:01:52, wind rises, no aurora. 



February, 1904. 2: 12: 20, calm, overcast ; 2: 14:38, scale increased to 38". 9. 3:00:02, scale 

 decreased to 45 a .o, then increased to 66*.o ; 3:00:44, scale stopped a moment here and then 

 continued to 7od ; 3:00:50, scale reached 4od on this swing; 3:01:38, wind has risen; 

 3:05:12 and 14, scale increases very slowly; 3:07:30, decreasing slowly and irregularly; 

 3:07:36, wind in squalls, clear in north, moon visible, stars visible in north ; 3:07:44, shovel- 

 ing snow from entrance; 3:08:22, high wind through 20:00; 3:14:46, cloudy; 3:15:50, 

 shoveling snow from entrance; 3: 18:50, wind verv strong, at end observations wind light, 

 'rom northeast. 4:16:00, high wind, clear overhead, cloudy in south; 4:19:02, almost 



