a 
Geological Society: Anniversary Address, 1843. 511 
ject) in the experiments described in Arts. 205, 208, in the 
latter of which a chemical action, distinct from the calorific, 
seems also traceable. I may here also mention that the rays 
which operate the change of colour in muriate of cobalt from 
rose colour to green appear to be the calorific rays generally, 
and the effect to be one of simple evaporation : since under 
the action of the spectrum I find the green colour not re- 
stricted to the “ parathermic” region, but to extend far be- 
yond the red, and to be, in fact, commensurate with the ca- 
lorific spectrum, so far as it could be traced in an experiment 
made under unfavourable circumstances. 
I have the honour to remain, my dear Sir, 
Yours very truly, 
Collingwood, Nov. 15, 1842. J. EF. W. HERscHEL. 
LXXXV. Proceedings of Learned Societies. 
GEOLOGICAL SOCIETY.* 
Feb. 17, A T the Anniversary Meeting held this day, the President, 
1843. R. I. Murchison, Esq., F.R.S., announced the award of 
two Wollaston Medals to MM. Dufrénoy and Elie de Beaumont, 
for their Geological Map of the kingdom of France ; and also the 
application of the balance of the Wollaston fund to promote the 
publication of Mr. Morris’s tabular work, the merits of which were 
adverted to last year (Phil. Mag. S. 3, Vol. xx. p. 544). 
The President. then commenced his Anniversary Address on the 
progress of Geology, of which the following extracts present the 
most characteristic features: the paragraphs in the smaller type are 
our own, introduced for the purpose of connecting those in the 
larger, which are portions of the Address itself. 
The Address begins with a brief notice of three deceased Fellows of the 
Society, the Earl of Munster, Dr. Arnold of Rugby, and Mr. Thomas Bot- 
field of Hopton Court ; the latter of whom amassed a considerable fortune 
by selecting, on geological grounds, the elevated and detached coal-field of 
the 'Litterstone Clee Hill, in Shropshire, as the seat of his mining operations. 
Mr. Murchison then proceeds as follows : 
OFFICIAL CHANGES. 
The official change occasioned by the retirement of Mr. Lonsdale 
having been adverted to in the Report of the Council, and the warmest 
thanks of this Meeting having been voted to him, I would now ex- 
press my own sense of the meritorious services of that officer. 
Fourteen years, Gentlemen, have elapsed since his appointment 
was made; during which time your collections and your volumes at- 
test the arduous and successful labours of your Curator and Libra- 
rian. Reorganizing our Museum, and naming a multitude of spe- 
cies after most elaborate comparisons with foreign and British types, 
* The abstracts of papers read at the ordinary meetings of the Geological 
Society will be resumed in a future number. 
