without an Lelipse. 31 
_ Up to the time of writing this paper I have not seen the 
photographs taken during the eclipse. Mr. Wesley wishes me 
to say that he has not seen the photographs or any drawin 
of the eclipse, and that, therefore, he has been wholly without 
bias in making his drawings from my plates. If these draw- 
ings are compared with the photographs taken during the 
‘eclipse, it should be borne in mind that the absence of sky- 
illumination during the eclipse would allow a larger part of 
the fainter and more distant regions of the corona to be photo- 
graphed, and that any peculiar conformations or detailed 
structure of these outer portions could not be expected to be 
seen on my plates. The comparison should be restricted to the 
regions of the corona at corresponding distances from the sun’s 
limb. It is probable that the short-exposure eclipse negatives 
will be found to admit of comparison with my plates better 
than those exposed for a longer time. 
; protcgraphes of the sun have been taken on the days which 
ollow :— 
ae Sepa 1 plate. Jthe (6 20. 1 plate. 
Bi aso ae te Oy AO lot 3 plates. 
os, Fee 2 plates. . 162 Bes 
see ky |: Sa ae oo Atigeat 825507054 oF 
May 1 1 plate oP BBL aus Pe 
ee. PERE 6 plates a Pe 7 
nos) Pa ee Bob. Bute ate eos 
me Ee 3: 
All these plates show a more or less distinct coronal appear- 
ance about the sun. On some of the days an unfavorable 
wind brought here the London smoke, which greatly increased 
the sky-illumination relatively to the coronal light which could 
reach the plate. On these days the photographic action on the 
plates around the sun, though distinctly coronal in character, 
possesses less definiteness of form. I entertain the hope that 
it may be possible, by a careful comparison of all the plates, to 
corona, or been due to its motion, during the period covered 
y the observations, 
[Professor Stokes, who read the paper, also read the followin 
letter from Mr. Lawrence, one of ihe observers of the eclipse of 
May 6th, at Caroline Island.] : 
“Dr. Huggins called upon Mr. Woods this morning i 
Showed us the drawings Mr. Wesley has made of his coronas. 
He told us that he particularly did not wish to see our negatives, 
