Geological Soctety. 305 
(I believe I overestimate the amount which I have as yet ob- 
tained, at two grains), which precluded me from trying many 
reactions. The method of spectrum-analysis adopted to prove 
the same fact, although perfectly conclusive to my own mind, 
might not have been so to others, unsupported by chemical 
evidence. 
The following diagram will serve to show the position in the 
spectrum which the new green line occupies with respect to the 
two lithium and the sodium lines. 
Lia Li8 Naa 
j= ae 
New 
Green Line. 
For confirmatory experiments on many of the observations 
mentioned in this paper, I am indebted to my friend Mr. C. 
Greville Williams. The detailed examination of the various 
spectra are at present being joimtly pursued by us, and will be 
published as soon as completed. 
XLVII. Proceedings of Learned Societies. 
GEOLOGICAL SOCIETY. 
[Contined from p. 238. ] 
January 23, 1861.—L. Horner, Esq., President, in the Chair. 
othe following communications were read :— 
1. “On the Gravel and Boulders of the Punjab.” By J. 
D. Smithe, Esq., F.G.S. 
In the Phimgota Valley (a continuation of the great Kangra or 
Palum Valley) the drift consists of sand and shingle with boulders of 
gneiss, schist, porphyry, and trap, from 6 inches to 5 feet in diameter. 
Some of the boulders, having a red vitreous glaze, occur in irregular 
beds. This moraine-like drift lies on the tertiary beds, which, here 
dipping gently towards the plains, gradually become vertical, and 
are succeeded by variegated compact sandstones, gradually inclining 
away from the plains ; next come various slates, at a high angle ; and 
gneissic rocks lie immediately over them. 
2. “On Pteraspis Dunensis (Archeoteuthis Dunensis, Roemer).” 
By Prof. T. H. Huxley, F.R.S., Sec. G.S. 
The fossil referred to in this communication is from Daun in the 
Eifel, and was described by Dr. Ferd. Roemer (in the ‘ Palzonto- 
Phil. Mag. S. 4. Vol. 21. No. 140. April 1861. X 
