CONl'ENTS. Svii 



Page 



12. Report of the Committee on the Proximate Constituents of the various 

 kinds of Coal . 692 



13. Note on Valency or Atomicity. By Wm. Durham, F.R.S.E 692 



14. On a Method for Determining the Vapour-pressures of Solutions. By 

 Thomas Ewan, B.Sc, Ph.D., and \V. R. Ormaudy 693 



Section C— GEOLOGY. 



Address by Professor C. Lapworxh, F.R.S., F.G.S., President of the Section 60.5 



[Delivered on Monday, August 8.] 



THURSDAY, AUGUST i^. 



1. Report of the Committee on Photographs of Geological Interest 707 



2. On the Glacial Distribution of the Riebeckite-Eurite of Ailsa Craig. By 

 Joseph Lomas, Assoc. Roy. Coll. Science 707 



3. Report of the Committee on Erratic Blocks 708 



4. The Cause of the Ice Age. By J. W. Gray, F.G.S., and Percy F. Ken- 



dall, F.G.S 708 



5. The Devon and Cornish Granites. By W. A. E. Ussher 709 



6. Malvern Crystallmes. By A. Irving, D.Sc, F.G.S ; 709 



7. The Igneous Rocks of the neighbourhood of Builth. By Henry Woobs, 

 B.A., F.G.S 710 



8. Note on a Green Sand in the Lower Greensand, and on a Green Sandstone 



in Bedfordshire. By A. C. G. Cameron 710 



9. The Fullers' Earth Mining Company at Woburn Sands. By A. C. G. 



Cameron 711 



10. Report of the Committee on the Circulation of Underground Waters ... 711 



FRIDAY, AUGUST 5. 



1. On a Widespread Radiolarian Chert of Arenig Age from the Southern 



Uplands of Scotland. By B. N. Peach, A.R.S.M., F.R.S., F.G.S 711 



2. On the Contact Metamorphism of the Radiolarian Chert in the Lower 



Silurian Rocks along the Margin of the Loch Doon Granite. By J. 

 Horne, F.G.S 712 



3. On the ' Grampian Series ' (Pre-Cambrian Rocks) of the Central High- 



lands. By Henry Hicks, M.D., F.R.S., Sec.G.S 712 



4. On the Still-possible Cambrian Age of the Torridon Sandstone. By J. F. 

 Blake, M.A., F.G.S 713 



5. On the alleged Proofs of Submergence in Scotland during the Glacial 



Epoch. By DuGALD Bell, F.G.S. 713 



6. On some Calcareous Tufas in Norway. By Professor Axell Blytt 714 



7. Fossil Arctic Plants found near Edinburgh. Bv Clement Reid, F.L.S., 

 F.G.S .". 71(5 



8. The Cutting.? on the Crieff and Comrie Railway. By Henry Coates, 



F.R.S.E 717 



1892. a 



