71G 
PROFESSOE J. K LOCKYER ON RESULTS OBTAINED WITH THE 
At the beginning of the second exposure the signal that totality had commenced 
was given. 
Between the sixteenth and seventeenth exposures, on a change of slides being 
made, two apparently complete rings were observed on the ground glass screen of the 
camera; they were coloured green and yellow, and probably correspond to the 1474 K 
and Dg lines. 
Fig. 1 shows an enlargement of the 1474 K ring (from photograph Number 12) 
placed alongside a reduced copy of the corona from a photograph taken by Schaebeele 
in Chili. This particular one has been selected, because the exposure was short enough 
to make the lower corona thus obtained comparable with the spectrum ring at 1474 K. 
Fig. 1. 
Comparison of the 1474 K spectrum ring with the lower corona. 
On comparison it will be seen that the prismatic camera has picked out the brightest 
parts of the corona, and where it is strongest, the spectrum ring and the continuous 
spectrum at those points is most intense, whilst a prominence occurring at aii}^ part 
of the sun’s limb does not alter the intensity of the ring at the corresponding part. 
Six of the photographs are reproduced in Plate 11, on a scale of three times that of 
the original negative. 
O 
The numbers correspond to those given in the first column of the “ Table of 
Exposures.” The parts of circles photographed are chiefly K.H./n G and F. 
Description of Plate 11. 
No. 2 was taken as near the commencement of totality as could be estimated, and 
was probably exposed when the moon had just covered the photosphere. The exposure 
Avas very short, but still long enough to over-expose the plate between F and K. 
Beyond K at one end numerous ultra-Auolet lines are shown; Avhile beyond F at the 
other several bright lines are discernible as far as h, Avhich probably is registered as 
two bright lines. 
