406 



it, but for which no theory had been proposed. In the last two 

 sections, the author treats of the collateral subject of the vision of 

 cameos, and of the drawings of solid bodies. 



2. Papers on Glaciers. No. 1, Account of a Geometrical Sur- 

 vey of the Mer de Glace of Chamouni. By Professor 

 Forbes. 



This paper does not admit of abridgment. The author gave an 

 account of a survey which he executed of the whole extent of the 

 principal glacier of Mont Blanc and its tributaries. A base line of 

 nearly 3000 feet was carefully measured in the valley, and extended 

 by means of a very careful triangulation to a point on the glacier 

 distant 28,600 feet, and elevated 4400 above tho base line. From 

 the several points of this triangulation, the positions and heights of 

 the adjoining mountains were taken and laid down on a map on a 

 scale of 55500 of nature, portions having been drawn out to loooii- 

 The map was laid before the Society, and is now being engraved. 



The following Donations of Books to the Society's Library 

 were announced. 



Elements of Chemistry, including the Applications of the Science to 

 the Arts. By Professor Graham, University College, London. 

 Part 6. — By the Author. 



Maps of the Irish Ordnance Survey; containing the County of Water- 

 ford, in 42 sheets. — By his Excellency the Lord Lieutenant. 



The following Donations to the Museum were presented — 



Specimens of Volcanic Rocks from Vesuvius, and Minerals from 

 Derbyshire. — Presented by Sir T. M. Brisbane, Bart. 



Specimens of Fossil Shells from Grignon, collected by Dr Stark in 

 Oct. 1833. — Presented by John Stark, Esq. 



The following gentlemen were duly elected Ordinarj'^ Fel- 

 lows of the Society : — 



Dr John Rose Cormack, Fellow of the College of Physicians of 

 Edinburgh. 



Dr Allen Thomson, Professor of the Institutes of Medicine in tho 

 University of Edinburgli, 





I 



