388 British Associalio?i. 



On the Optical characters of Minerals, by Sir David Brewster. — 

 An account of an investigation of the constitution of certain hvdrated 

 salts, by Mr. Graham. — On a new mode of liquefying the gases, by 

 Mr. Kemp.— On the electro-magnetic condition of mineral veins, by 

 Mr. Fox.— On the dimorphism of the sesqui-iodide of antimony, by 

 Prof. Johnston. 



Section of Geology and Geography. 

 Chairman. — Prof. Jameson. 



The Section entered upon a discussion of the views of Dr. Boase 

 relative to stratification, &c.,'arising out of the last year's proceedings. 

 ■ — Dr. Rogers's Report on the Geology of North America was read, 

 illustrated by maps. — A Report by Mr. Stevenson, On the state of 

 our knowledge respecting the relative level of land and sea, and the 

 waste and extension of land on the east coast of England, illustrated 

 by charts and sections of the German Ocean. — Lord Greenock read 

 a paper on the coal formation of the central district of Scotland. — 

 A notice by Mr. Menteath on the Closeburn limestone was read, 

 in which an account was given of the geological, mineralogical, and 

 chemical characters of that deposit. — A notice was read by Mr. 

 Trevelyan, on fossil wood from a bed of clay lying above coal in 

 Suderoe, the most northern of the Faroe Islands. — Dr. Hibbert 

 read a paper, On the ossiferous beds contained in the basins of 

 the Forth, the Clyde, and the Tay. A large collection of fossils 

 connected with this paper were submitted to the inspection of 

 M. Agassiz, and became the subjects of highly important investi- 

 gation, and communications from him during the sittings of the 

 Association. — On the structure of recent and fossil Woods, by 

 Mr. Nicol. — Some remarks on the Geology of the Orkneys, by 



Prof. Traill On the Geology of Berwickshire, by Mr. Milne. — • 



Notice of some caverns containing bones near the Giant's Cause- 

 way? by Mr. J. Bryce. — A general view of the relation of joints 

 and veins, by Prof. Phillips. — A tabular view of the order of succes- 

 sion of various formations of great thickness, and distinct from each 

 other in their organic remains and mineralogical characters, which 

 rise from beneath the old red sandstone of England and Wales, by 

 R.I. Murchison, Esq. — M. Agassiz delivered some highly interesting 

 observations on the fossil fishes of Scotland. — On the flints found 

 in various parts of Aberdeenshire, and more especially in the vicinity 

 of Peterhead, by Dr. Knight. 



Section of Natural History. 

 Chairman — Prof. Graham. 



A report was read on the recent and present state of Zoology, by 

 the Rev. Leonard Jenyns, F.L.S. — Also, An account of excursions in 

 the neighbourhood of Quito, and towards the summits of Chimbo- 

 razo and Pichincha, by Colonel Hall. — Prof. Agassiz next made a 

 highly valuable communication upon the different species of the 

 genus Salmo which frequent the various rivers and lakes of Europe, 

 in which he reduced the species to six. — On the plurality and de- 

 velopment of embryos in the seeds of Coniferae, by Robert Brown, 



