VIU CONTENTS. 



Page 

 Mr, C. R. A. Wright and Chaeles H. Piesse on the Oxidation products 

 of the Essential Oil of Orange-peel, known as " Essence do Portug-al " . . . . 83 



Sir. C. R. A. Wright on certain new Derivatives from Codeia 84 



GEOLOGY. 



Address by Archibald Geikie, F.R.S., President of the Section 87 



The Rev. J. F. Blake on the Yortshiro Lias and the Distribution of its 

 Ammonites 90 



Mr. D. J. Brown on the Silurian Rocks of the South of Scotland 93 



on the Upper Silurian Rocks of the Pentland Hills and 



Lesmahago 93 



Dr. Robert Brown's Geological IVotes on the Noursoak Peninsida and Disco 

 Island in North Greenland 94 



Dr. Bryce on certain Fossils from the Durine Limestone, N.W. Suther- 

 land ■* 94 



Mr. W. Carruthers on the Vegetable Contents of Masses of Limestone 

 occurring in Trappean Rocks in Fifeshire, and the conditions under which 

 they are preserved 94 



Mr. John Curry on the General Conditions of the Glacial Epoch ; with Sug- 

 gestions on the formation of Lake-basins 95 



Mr. R. Dainteee on the General Geology of Queensland 96 



Mr. W. Boyd Dawkins on the Relation of the Quaternary Mammalia to the 

 Glacial Period 9o 



Prof. Geikie on the Progress of the Geological Survey in Scotland 9G 



Mr. D. Grieve on the Fossiliferous Strata at Lochend near Edinburgh .... 98 



]\Ir. G. J. Grieve on the position of Organic Remains near Burntisland .... 98 



Sir Richard Griffith, Bart., on "The Boulder Drift and Esker Hills of 

 Ireland," and " Onthe position of Erratic Blocks in the Countiy " 98 



The Rev. J. Gtjnn on the Agency of the Alternate Elevation and Subsidence 

 of the Land in the formation of Boulder-clays and Glaciers, and the Exca- 

 vation of Valleys and Bays 100 



Mr. John Henderson on the Age of the Felstones and Conglomerates of the 

 Pentland Hills 101 



Professor Edward Hull and Mr. William A. Traill on the relative ages 

 of the Granitic, Plutonic, and 'N'olcanic Rocks of the Mourne Mountains and 

 Slieve Croob, Co. Down, Ireland 101 



The Rev. Dr. Hume on the Coal-beds of Panama, in reference mainly to their 

 Economic Importance 103 



Mr. Charles Lapworth and Jajies Wilson on the Silurian Rocks of the 

 Coimties of Roxbm-gh and Selkirk 103 



Mr. Charles Lapworth on the Graptolites of the Gala Group 104 



Mr. P. W. Stuabt Menteath on the Origin of Volcanoes 104 



Mr. L. C. Miall's further Experiments and Remarks on Contortion of Rocks 106 



Mr. John Miller on the so-called Ilyoid plate of the Asteroleins of the Old 

 Red Sandstone lOG 



Mr. D. Milne-Home on the Conservation of Boulders 107 



Mr. W. S. Mitchell's further Remarks on the Denudation of the Bath 

 Oolite 107 



