March 24, 1870] WA RORE 
537 
bright lines, which I had fully expected to see in the lower strata | of the green line coincides with that of the brightest line in 4, 
of the corona, I opened the jaws of the slit, and repeatedly ad- | instead of the mean of the three, which I read as a verification ' 
justed by the finder, but without effect. What J saw was un- | the line near to F was in all probability F itself; E was certainly 
doubtedly a continuous spectrum, and I saw no lines.* There may | not seen by me. The line in the blue it is useless from my data 
have been dark lines, of course, but with so fainta spectrum and | to speculate upon, I must hope that some one else has identi- 
the jaws of the slit wide apart, they might escape notice. fied it. 
We next have the spectrum of the Great Horn :— 
It is pleasing to point out how very nearly Major Ten- 
One line in the red was so beautiful that it needed an effort to | Nant’s observations, as now given, approximate to the true 
turn my attention to anything else; there was a line in the | State of the case, which we can now determine any day 
orange not so well defined, and one in the green which seemed | that the sun shines. He must be entirely congratulated 
FIG. 2.— OBSERVATORY TENTS. 
FIG. 3-—ONKE OF THE FIRST PHOTOGRAPHS, SHOWING THE FIG. 4.—THE LAST PHOTOGRAPH TAKEN, SHOWING THE ANIMAL-LIKE 
GREAT HORN PROMINENCE AND THE ECLIPSE OF THE GREAT HORN 
multiple (it must be remembered that I had not time to adjust | on the degree of success of his spectroscopic observations 
the jaws of the slit accurately, and that the brilliancy of these | —observations made, according to his report, under diffi- 
lines made them broader by irradiation); beyond, I saw aline | culties which he ought not to have encountered. Major 
just defined, which, as will be seen from the measures before | Tennant’s evidence in favour of the continuous spectrum 
given, must have been near to F’, and still further offin the bluel | oF the corona has been entirely confirmed by the obser- 
saw a hazy light probably beyond G. ANSE RISD AEA tim ANOSIGAL, ss 
The photographic results we may introduce by a wood- 
: . cut of the observatory and of the instrument, with spe- 
* Tn the instructions for Lieut. Herschel his attention was first drawn to culum of nine inches aperture, mounted by Mr. Browning, 
the protuberances. I therefore had resolved to attend first to the corona, lest A aes Ia Soe % 
each of us should have only the same partial tale. | with which the photographs were taken. 
The red and yellow lines were evidently C and D, the readin; 
y » ? g 
