C. A. Young—The Solar Eclipse. 287 
by Mr. W. H. Pierce, of Denver, who kindly volunteered to 
assist us in this way. Starting his stop watch at a signal given 
by Professor Rockwood, he beat once in two seconds with a 
small hammer upon an anvil so as to be distinctly heard through 
the whole ground, and called out every tenth second. Thus 
every observer knew precisely how much time remained at his 
disposal. With the single prism integrating spectroscope, Mr. 
Bennet saw at the beginning of totality, for three or four sec- 
onds F and 1474, and these only—he could not see C—why, I 
cannot imagine, but with nearly the same instrument Mr. Abba 
had a similar experience in Spain in 1870. During totality the 
continuous spectrum was too faint to show the spider lines. 
Four seconds before the end of totality 1474 “shot out” again, 
followed by the bluish green line, which was seen to change 
into the dark line F. F was much brighter and broader than 
474. No dark lines could be seen, nor indeed lines of any 
kind except the two named, and that only for a few seconds at 
egioning and end of totality. 
With the six-prism Grubb spectroscope, Mr. Smith could see 
absolutely nothing. 
_ Shiless spectroscopes.—Professor Brackett reports his observa- 
tion as follows: “About thirty-five seconds of the totality had 
passed when I had put my plates in their places and waited 
for quiescence and exposed them. My eye of course was in its 
Most sensitive condition as I had just left the dark room. The 
first thing I did, therefore, was to take a large direct vision prism 
having neither slit nor telescope, and look for rings. | saw 
none but did see clearly the following that were very clear and 
distinct. A line in the red, one in the yellow, one in the green 
and a fourth in the violet [? blue]. All these lines were clear 
and sharp as long as I continued to look, perhaps ten or fifteen 
seconds. They were not to be seen at any considerable distance 
from the moon, and only along its eastern limb, extending over 
an are of about 120°.” Of course the lines seen were C, D,, 
1474, and F.. Professor Rockw sed the binocular instru- 
u 
ment described previously. I give his interesting report in his 
