360 
ME. WAEEEN DE LA EUE ON THE 
that by the addition of detail after detail in the several prominences I was exaggerating 
their dimensions; but there was too little time to spare to mb out and commence 
anew. 
When the first drawing was completed, about a minute and a half after the com- 
mencement of the totality, I looked away from the telescope in order to make the eye 
observations which I have already described, and before I resumed my work at the 
telescope an interval of half a minute may have elapsed, but certainly not more. The 
next thing I did was to measure the angular position of the prominence A ; and after 
bringing the moon well into the tangential square, I moved the wire D through the arc 
necessary to bring it into contact with the side of that prominence nearest to D, which 
brought the index to an exact coincidence with one of the divisions on the quadrant ; I 
noted down 10° for the angle moved through ; but this is an evident error, for the angle 
was as nearly as possible 20°, which, added to 2° 59', makes the position-angle of the 
western boundary of that prominence 22° 59', from the north towards east, which is not 
far from its true position at that time. 
Whilst measuring this prominence, I asked Mr. Eetnolds, whose allotted task it was 
to develope the photographs after their exposure in the heliograph, whether anything 
could be seen on the first plate of the totality ; and learning, with a thrill of intense 
pleasure, that the operation had completely succeeded, I made no further measurements, 
knowing full well that I should get them far better in the photographs. 
Immediately after this, I commenced my second drawing, given in Plate VI., and 
noted down the position of the prominences A and E very exactly, by referring them 
to position-line D ; and I then filled in the other details. As very little time remained 
for the completion of the drawing, I devoted my attention chiefly to the prominence E 
and a faint hooked prominence about 45° to the west of the position-line D, which did 
not imprint its image on the second photograph to the extent I should have expected 
from its dimensions in my sketch. 
Between the completion of the first sketch and the commencement of the second, 1 
estimate that there was an interval of about one minute, and that the second sketch 
was therefore commenced as nearly as possible 2^ minutes after the beginning of 
totality. 
Thus, before commencing sketch No. 1, there elapsed, 
min. sec. 
From the beginning of total obscuration ....... 0 30 
To complete No. 1 sketch it required 1 0 
Time consumed by eye observations, away from the telescope . 0 30 
The measurement of prominence A occupied 0 30 
Interval elapsed from the beginning of totality to the com- 
mencement of sketch No. 2 2 30 
By placing a horn protractor on the original sketches, the following measui’ements 
were made : — 
