MAGNETISM 



forty-five degrees with the horizon, when it faded. The 

 whole display lasted twenty minutes. The dotted line in 

 the figure shows the last position of the beam. It differed 

 from the ordinary searchlights in the great breadth and 

 parallel sides of the beam as well as in its steady motion. 



This was one of the few aurorge somewhat in the direc- 

 tion of the Magnetic Pole, but it did not appear to be very 

 distant, to judge from its illumination of cirrus clouds at 

 a great height. 



Aurora on August 31 



On August 31 was seen the aurora figured below. 

 Almost in the zenith there was a large tract of sigmoid 

 shape. From near this there diverged very long faint 

 streamers over the whole quarter of the sky from east to 

 north. Though pretty close together the streamers were 

 not joined as in a curtain, and were of unequal lengths. 

 On several other occasions similar displays, converging on 



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