ON THE TOTAL SOLAR ECLIPSE OF AUGUST 29, 188G. 
339 
Amongst the stronger lines the following have been observed in 1886 and 1883, but 
not in 1882 ;— 
1886. 
1883. 
4029-7 
4031 
4036-8 
4037 
4063-5 
4064 
4075-7 
4075 
4183-5 
4185 
4247-2 
4248 
4280-6 
4279 
4378-1 
4377 
4427-5 
4427 
4468-5 
4465 
4627-9 
4636 
4547-8 
4546 
4557-2 
4555 + 3 
4570-2 
4571 
Here again the agreement is good for the greater number of the lines. 
If we endeavour to trace coincidences between the corona lines and the lines of 
known elements, we meet with serious difficulties. Owing to the multitude of lines, 
accidental agreements will be frequent, and no certain conclusions can be drawn 
unless we can trace a number of coincidences, or, at any rate, discover some group 
repeated with all its characteristic features. Nor must we forget that the green 
corona line, which, before the Egyptian Eclipse, was the only known corona line, has 
no representative in the spectrum of terrestrial substances, and the same holds for 
a large number of the lines occurring most frequently in the Solar chromosphere. 
It should, therefore, not surprise us if we cannot recognise any of our elements in 
the corona. 
I have been much puzzled, however, by a series of coincidences, which, although I 
have finally come to the conclusion tha.t they are accidental, yet seem to deserve being 
mentioned in this report. If we look at photographs of the line spectrum of nitrogen, 
the most striking features in the violet are as follows ;— 
Nitrogea. 
Corona. 
Manganese. 
1. A very strong line at. 
3994-5 
r 
4025-3 
4026-0 
4029-5 
2. A triplet, the least refrangible being the strongest . . . . <|^ 
4034-4 
4029-7 
4031-8 
4041-7 
4036-8 
4040-6 
[ 
4228-9 
4232-8 
4227-0 
3. A triplet, in -which the t-wo least refrangible are the strongest 2 
4236-4 
4237-9 ? 
4234-6 
4240-6 
4241-0 
4. A group of lines, having its two strongest lines at .... | 
4628-9 
4641-2 
4627-9 
4644-0 
2x2 
