Darioin-Wallace Celebration. 55 



learning, distinguished by the zeal with which she has 

 promulgated and advanced it, may the Linnean Society 

 accept from the Royal Society of Edinburgh these present 

 fraternal congratulations, and these our best wishes for her 

 lasting honour and prosperity. 



In the name of the Royal Society of Edinburgh, 



(Signed) D'ARCY W. THOMPSON, 



Delegate. 



THE GEOLOGICAL SOCIETY OF LONDON (Mr.W. H. Hudleston, 



F R S F L S } 



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THE CAMBRIDGE PHILOSOPHICAL SOCIETY (Dr. S. F. Harmer, 



F.R.S.). 

 THE ROYAL ASTRONOMICAL SOCIETY (The President, Mr. H. F. 



Newall, F.R.S.). 



THE ZOOLOGICAL SOCIETY (Mr. G. A. Boulenger, F.R.S.). 

 THE BRITISH ASSOCIATION (The President, Sir David Gill, 



K.C.B., F.R.S.). 

 THE ENTOMOLOGICAL SOCIETY OF LONDON (The President, 



Mr. C. 0. Waterhouse). 



THE ROYAL MICROSCOPICAL SOCIETY (The President, The 



Lord Avebury) 



presented an address as follows : 



ROYAL MICKOSCOPICAL SOCIETY, 



20 Hanover Square, London, W., 



July 1st, 1908. 



THE ROYAL MICROSCOPICAL SOCIETY in the presence o its 

 President, the Lord Avebury, desires to be associated with 

 other Scientific bodies in the congratulations on the event 

 the Linnean Society is now celebrating in commemoration 

 of the 50th anniversary of the reading of the joint essay 

 by Charles Robert Darwin and Alfred Russel Wallace, On 

 the Tendency of Species to form Varieties, and on the 

 Perpetuation of Varieties and Species by Natural Selection. 

 The publication of that Essay gave an immense stimulus 



