1915] 



on the Total Solar Eclipse of 1914 



367 



whether there was any connexion between the streamers named and 

 the spot. His constructions were made from measures taken on an 

 enlarged positive of the corona, six inches to the moon's diameter. 

 In fig. 1, A, B, C, D, E, are five points accurately measured on the 

 single bright ray at position angle 356°, and is the centre of the 

 large spot. The lines C, C A, A B, B E, E D, D form a hexagon. 

 The intersections of the directions of the opposite pairs of sides C, 

 BE; C A, ED; A B, DO are in a straight line. Hence a conic 



III 



Fig. 2.— Curves I, II, III, on the West. Curves IV, V, on the East. 

 is the spot, 



passes through the five points measured on the ray and the sun-spot. 

 Applying the geometrical process of reciprocation and making a graph- 

 ical solution, it is found that the projected conic is a very elongated 

 ellipse. Treating by the same method the bright edges of the X.W. 

 streamers, it is found that the projected conies certainly come from 

 the area immediately surrounding the spot, and probably from the 

 spot itself. The geometrical solution in these cases is not so rigid, 



2 B 2 



