part 1 ANNIVERSARY" MEETING MUBCHIS03 MEDAL. xliii 



that the ice which once overspread Canada, east of the Cordillera 

 Avith its mountain-glaciers, emanated from a single centre of dis- 

 persal. Mr. Tyrrell rirst demonstrated the existence and ap- 

 proximate limits of a great ice-sheet, which he named the Keewatin, 

 centreing in the country west of Hudson Bay and distinct in origin 

 from the Labradorean ice-sheet on the east. To these two he 

 subsequently added a third, under the name of the Patrician Glacier, 

 which had its gathering-ground to the south of Hudson Bay. 

 His development of this thesis, involving a discus>ion of the re- 

 lations in time and space of the ice-sheets radiating from different 

 ■centres, must rank among the most important contributions to the 

 Glacial history of North America. 



In forwarding to Mr. Tyrrell this token of recognition from the 

 •Council of the Geological Society, I beg, Sir, that you will add to 

 our congratulations upon what he has already accomplished our 

 hope that many years of activity still remain to him ; and this 

 wish will, I am sure, be echoed by his numerous friends on both 

 sides of the Atlantic. 



Sir George Perlev replied in the following words : — 



Mr. President, — 



I am very happy to come here to-day and receive this Medal on 

 behalf of Mr. Tvrrell, and I onlv regret that lie is not here himself 

 for that purpose. He was in London for some time last year, but 

 unfortunate 1}' had to return to Canada last month, so that he has 

 missed the pleasure of being with you to-day. As I live in Ottawa, 

 I have known Mr. Tyrrell for a long time. He is a native-born 

 Canadian, and was for many years connected with the Canadian 

 Geological Survey. He showed much resource and energy in his 

 work, and it is very fitting that he should be recognized by your 

 Society in this way. 



I may say that, in our Dominion, we are proud of our Geological 

 Survey and of wdiat it has done. We have a large country with 

 great undeveloped mineral resources, which the Geological Survey 

 has done a great deal to discover and utilize. Fortunately, 

 Canada has been able to assist more than could have been expected 

 in providing minerals and metals during the war. Many supplies 

 from enenry countries have been cut off, and higher prices have 

 encouraged enterprise. In consequence, we have not only provided 

 large quantities of nickel, but we have developed our copper, lead, 



