1890.] Proceedings of Scientific Societies. 207 
Ottawa, Canada. The Crystalline Schists of the Black Hills of . 
Dakota; C. R. Van Hise, Madison, Wisconsin. On the intrusive 
origin of the Triassic Traps of New Jersey, with special reference to 
Watchung Mountains ; Frank L. Nason, New Brunswick, N. J. The 
Geology of the Crazy Mountains, Montana; J. E. Wolff, Cambridge, 
Mass. The Cuboides Zone and its Fauna, A discussion of methods of 
correlation; H. S. Williams, Ithaca, N. Y. On the Pleistocene Flora 
of Canada: Abstract; Sir William Dawson and D. P. Penhallow, 
Montreal, Canada. The Fiords and Great Lake Basins of North 
America considered as evidence of preglacial continental elevation 
and of depression during the glacial period ; Warren Upham, Somer- 
ville, Mass. On the Genus Spirifera and its inter-relations with the 
Genera Spiriferina, Syringothyris, Crytia, and Cryotina: Abstract ; 
James Hall, Albany, N. Y. nsome Ancient Shore-lines and their 
ee F. J. H. Merrill, New York. Geology of the Boston Basin ; 
. O. Crosby. On the Collection and Preservation of Geological 
Poi by the American Geological aari and the facilitation 
of their exchange among its members; J. F. Kemp, Ithaca, N 
On the Metamorphic Rocks of south-eastern New York ; F. J. H. sae: 
rill, New York. Experiments with Cave Air for cooling and ventilating 
rooms; M. H. Crump. On some Porphyries of the Plain of Mexico, 
read by title; Persifor Fraser, Philadelphia, Pa. On the Horned 
Dinosauria of the Laramie, read by title; E. D. Cope, Philadelphia, 
Pa. On Pot-holes north of Lake Superior unconnected with existing 
streams ; Peter McKellar, Fort William, Ontario. 
The following is an abstract of some of the more important papers 
read at the meeting. 
On GLACIAL PHENOMENA IN CANADA. Robert Bell, Ottawa, Canada.— 
Advantages offered by the Dominion for the study of these phenomena. 
Questions as to interglacial periods. Preglacial or interglacial river 
valleys. Boulder Clays ploughed by subsequent glaciers. Almost univer- 
sal glaciation east of the Rocky Mountains. Progressive recession north- 
ward of the general glacial condition. Surface decay preceding the 
glacial period. Directions of striæ and drift transportation. Effects 
of regional changes of level in the northern part of the continent. 
Different origins of lake basins. Influence of geological conditions 
on glacial erosion in the production of geographical features. Did 
other forms of ice play any part? Examples peculiar to glacial 
action. Various proofs, Groups of general courses of grooves in dif- 
ferent directions. Various forms of moraines, belts, trains, heaps, 
