380 CAPTAIN W. DE W. ABNEY AND DR, T. E. THORPE ON PHOTOMETRIC 
Fio^. 7. 
Curve stowing relation between photometric intensity of coronal light and distance of corona from 
Sun’s limb. 
It will be quite obvious, from the cbaracter of this curve, that the diminution in 
intensity does not vary according to the law of inverse squares. To show the degree 
of departure we have calculated the intensity, on the basis of the law, at several 
points and compared them with the values taken from the curve at the same points. 
Distances in Solar 
semi-diameters. 
Photometric intensity. 
Observed. 
Law of inverse 
squares. 
1-6 
•066 
•066 
2-0 
•0.53 
•042 
2-4 
•043 
•029 
2-8 
•034 
•022 
8-2 
•026 
•016 
3-6 
1 
•021 
•013 
