XXIV PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



labours ; I consider this map to be one of the special grounds which 

 entitle Sir William Logan to the medal which has this day been 

 awarded to him. I am sure that every one who saw it in the Paris 

 Exposition, or subsequently in this country, must have been struck 

 with its execution, and the clear idea it conveyed of the geological 

 structure of the country. 



It only remains for me to request you to convey this token of our 

 appreciation of his exertions to Sir William Logan and to assure him 

 of our good wishes for his future success, and for the continued 

 progress of the Geological Survey of Canada under his auspices. 



Sir Roderick Murchison, having received the WoUaston Medal 

 from the President, replied : — 



Sir, — As Sir William Logan was, in the earlier part of his scien- 

 tific career, a distinguished contributor to the British Geological 

 Survey, and as my lamented predecessor, Sir Henry De la Beche, 

 had formed the highest opinion of his capacity, it naturally gives me 

 sincere pleasure to be the medium of transmitting to him this Wol- 

 laston Medal. 



Although the Atlantic has subsequently separated us from our 

 medallist during most of the period in which he has been occupied in 

 successfully advancing geological science in his native country, Canada, 

 it has been a source of true gratification to me to observe the very 

 able manner in which he has elaborated the full and accurate succes- 

 sion of the most ancient rocks of the vast regions he has surveyed ; 

 and to see how clearly he has separated the great series of funda- 

 mental sedimentary unfossiliferous rocks, termed " Lawrentian," or 

 "Cambrian," from those Silurian Rocks which, in common with all 

 geologists of the United States until the present moment, he has 

 placed in parallel with the Lower as well as the Upper Silurian of 

 Britain and the continent of Europe. 



The skilful manner in which he has followed out the course of 

 these ancient Silurian deposits, from their undisturbed and unbroken 

 sequence over vast tracts on the West to the sea-board or Eastern 

 region of North America, where they have been contorted, broken up, 

 metamorphosed, and mineralized, will doubtless be considered among 

 the most remarkable labours of our honoured associate. 



Whilst in his younger days he established, by the close and 

 repeated observations to which you, Sir, have well adverted, that 

 natural history constant which has enabled us to read off the true 

 history of the greater number of coal-fields, his maps and sections 

 illustrating the structure of the Canadas, prepared in the vast wilds 

 of that country amidst hardships and privations unknown to Euro- 

 pean explorers, will be the imperishable records of his fame as a 

 practical geologist. 



The devotion and untiring energy with which he arranged and 

 explained the natural productions of Canada, first at the Great 

 British Exhibition of 1851, and recently at the grand Exposition 

 of France, have obtained for him honours both from his own 



