Glacialists and Antiglacialists.--Erratic basins of Switzerland.--Similar phenomena observed in other parts of Europe.--Points necessary to be settled; first, the relation in time and character between the Northern and the Alpine erratics.--Traced in North America.---Not yet settled whether any local centres of distribution in America; but the general cause must have acted in all parts simultaneously. This action ceased at 35° north latitude; this incompatible with the notion of currents.--In both hemispheres a direct reference to the Polar Regions. Difficulty as to so extensive formation of Ice, removed; difficulties on the theory of Currents, the effects contrary to experience of Water-Action.--Erratic phenomena of Lake Superior.--The Iceberg theory.--Description of appearances at Lake Superior.--Drift: contains mud, and is without fossils.--Example of juxtaposition of stratified and unstratified Drift, at Cambridge.--Date of these phenomena not fully determined, but doubtless simultaneous all over the Globe.--The various periods and kinds of Drift distinguished.--Accompanied by change of level in the Continent, 97-98 VIII. Description of the Marine Telescope. By JOHN ADIE, F.R.S.E., F.R.S.S.A. Communicated by the Author, 117 IX. Experimental Investigations to Discover the Cause of the Change which takes place in the Standard Points of Thermometers. By JOHN ADIE, F.R.S.E., F.R.S.S.A. Communicated by the Author, 122 X. Observations on the Discovery, by Professor Lepsius, of Sculptured Marks on Rocks in the Nile Valley in Nubia; indicating that, within the historical period, the river had flowed at a higher level than has been known in Modern Times. By LEONARD HORNER, Esq., F.R.S.S. L. & E., F.G.S., &c. Communicated by the Author. With a Plate, 126 XI. On the Salmon Tribe (Salmonidæ); their Classification, Geographical Distribution, &c., 144 XII. Results of Observations made by the Rev. F. FALLOWS, at the Cape of Good Hope, in the years 1849-30-31. Produced under the superintendence of G. B. Airy, Esq., Astronomer Royal, 148 XIII. Discovery of the Great Lake "Ngami" of South Africa, 150