Smithsonian Report, 1913. — Bauer. 



Plate 8. 



Fig. 1.— The Aurora Borealis as first Successfully Photographed by 

 Prof. Carl Stoermer. 



[Halley was the first to suggest a connection between polar lights and the earth's 

 magnetism.] 



FiQ. 2.— A Local Magnetic North Pole at Treadwell Point, near 

 Juneau, Alaska, as Disclosed by L. A. Bauer's Observations in 

 1900 AND 1907. 



[In the center of the tent the dipping needle stood vertical, with the north end down, 

 and the compass reversed its direction when carried from one .side of the tent to 

 the other. Ships' compasses, a mile awav, in Gastineaux Channel, are deflected 

 about 11°.] 



