Reports & Proceedings — British Association. 521 



have not been examined for platinum. The finest material should 

 preferably be tested." 



A sample of the heaviest fine concentrate obtained in the washing 

 for diamonds was sent to the Imperial Institute to be assayed for 

 platinum metals, and the Director reports the following results: — 



Per ton of concentrate, 



oz. dwt. 



Platinum ..... 3 12 



Osmiridium .... 7 



He also reports: "Palladium was probably present, but the 



quantity was too small to be definitely identified. The concentrate 

 also contained a large amount of gold." 



VIII. — The Tertiary Geology of Devon and Cornwall. By H. J. 

 Lowe. Trans. Devon. Ass. Adv. Sci., etc., 1918, pp. 391-401. 

 TIIHE author reviews and discusses the conclusions reached by the 

 X Geological Survey and other authorities as to the Tertiary 

 history of the Devono-Cornish peninsula, with special reference to 

 the age and origin of the high-level plateaux and the courses of the 

 Tertiary rivers. He criticizes the views put forward by others, but 

 has little to offer in the way of alternatives. He does, however, 

 suggest that the plateaux may in part be due to the peculiarly 

 uniform and resistant character of the rocks composing them which 

 renders them equably resistant to denudation over large areas: no 

 evidence is brought forward in support of this hypothesis. It is 

 estimated that the excavation of the Teign valley to its present 

 depth occupied no less than 8£ million years, while a further 

 argument concerning the age of the limestone caverns is not very 

 clear, and its bearing on the point at issue is not obvious. 



IRIEIPOIRTS -A-HSTID PEOOEEDHsTG-S. 



I. — Titles of Papees, etc., read at Meeting of British Associa- 

 tion in Section C, Geology (and in other Sections bearing 

 upon Geology), Bournemouth, September 9, 1919. 



Presidential Address by Br. J. TV. Evans, F.R.S. 



Dr. TV. T. Ord. — The Tertiary Bocks of the Hampshire Basin. 



Professor S. H. Reynolds. — The Lithological Succession in the 

 Avonian of the Avon Section, Clifton. 



Reports of Committees. 



Excursion to Bournemouth Cliffs. — Leader, Dr. W. T. Ord. 



Sir Aubrey Strahan, K.B.E., F.R.S. — The Mesozoic Bocks of the 

 Bournemouth District. 



Joint discussion with Section H (Anthropology) in the Booms of 

 Section C. — The Post-tertiury Geology of the District with special 

 reference to the Flint Implements contained in them. Mr. Reginald 

 Smith introduced the discussion, and his communication was 

 illustrated by a collection of flint implements specially loaned for 

 this occasion. 



Mr. Henry Bury. — The Origin of the Bournemouth Chines. 



Br. TV. E. Miller. — The Pre-Cambrian of Central Canada. 



