PROCEEDINGS 
OF 
THE LITERARY AND PHILOSOPHICAL 
SOCIETY. 
Ordinary Meeting, October 5th, 1869. 
E. W. Bxnney. F.R.S., F.G.S., Vice-President, in the Chair. 
The following extract of a letter from Dr. J OULE, 
F. R.S., dated Southport, October 5th, 1869, and addressed 
to the Chairman, was read : 
I enclose a rough drawing of the appearance of the 
setting sun. Mr. Baxendell noticed the fact that at the 
moment of the departure of the sun below the horizon, the 
last glimpse is coloured bluish green. On two or three 
occasions I have noticed this, and also . near sunset an 
appearance like what I have rudely depicted. Just at the 
upper edge, where bands of the sun’s disk are separated one 
after the other by refraction, each band becomes coloured 
blue just before it vanishes. 
| On Nontronite,” by T. E. Thorpe, Ph.D., communicated 
by Professor H. E. Roscoe, F.R.S., <fee. 
There exists some doubt among mineralogists as to 
whether Nontronite is to be regarded as a distinct mineral 
Proceedings— Lit. & Phil. Society.— Yol. IX.— No. 1.— Session 1869-70. 
