lxvi PROCEEDINGS OF THE CENTENARY MEETING. 



The Canadian Institute. 



198 College St., Toronto, March 16, 1912. 

 Corresponding Secretary, The Academy of Natural Science of Philadelphia. 

 Dear Sir: 



I beg to thank you for your kind invitation to the Canadian Institute to 

 be represented at the Centenary Anniversary of the Academy, and I greatly 

 regret that it is impossible for me or any of my associates to be present with you. 

 You have had a long and successful career, and the President and Members 

 of the Canadian Institute extend you most hearty greetings, with the hope that 

 your future achievements may not only equal, but may far outdo, your accom- 

 plishments in the past. 



Yours sincerely, 



J. B. Tyrrell, 

 President, Canadian Institute. 



Carnegie Institution of Washington. 



The Trustees and the Investigators of the Carnegie Institution of Washington 

 extend greetings and congratulations to The Academy of Natural Sciences of 

 Philadelphia on the occasion of the celebration of its One hundredth Anniversary. 



The century of progress achieved by the Academy in the cultivation of the 

 Natural Sciences commands admiration for the devotion of our predecessors, 

 gives confidence in the fruitfulness of the labors of our contemporaries, and 

 warrants sanguine expectations for continued advances by our successors. 



Robert S. Woodward, 

 President. 



On a beautifully engrossed and illuminated sheet. 



