ANNIYERSAKY ADDRESS OF THE PRESIDENT. 6$ 



the Entomological Society, and in his 2oth year he became a Fellow 

 of the Linnean Society. For some ten or twelve years thereafter he 

 remained in London preparing lists of insects for the British Museum 

 and writing various excellent compilations, among which his "Natural 

 History of the Animal Kingdom " has had a wide sale, and has done 

 much to spread a sound knowledge of zoology through the country. 

 In 1858 he became Curator of the Yorkshire Philosophical Society's 

 Museum in York, and moved thither with his wife and family, 

 carrying with him also the chain of literary undertakings which 

 had bound him so closely to his desk in London. Besides dis- 

 charging the duties of his curatorship, he continued his contributions 

 to the " Westminster Review," the *' Annals and Magazine of Natural 

 History," and the " Philosophical Magazine," and took an active and 

 helpful share in the scientific life of which York was the centre. 



In 1868 Mr. Dallas was selected to fill the post of Assistant 

 Secretary to this Society. How admirably he discharged the multi- 

 farious and onerous duties of this responsible office has been grate- 

 fully acknowledged by the Council and by the Society. For 22 

 years he continued to serve us with a single-heartedness, intelli- 

 gence, and zeal, for which we must ever remain his debtors. Even 

 when the hand of death was already almost visibly upon him, he 

 still struggled to do his duty, coming to our meetings, taking his 

 customary part in our proceedings, and only retiring to his home to 

 die. He was struck down by paralysis and died on May 29th, 

 1890. 



The onward march of Geology has led to the gradual accumulation 

 of much knowledge regarding the varying phases of volcanic action 

 and the distribution of volcanoes over the surface of the globe. Yet 

 those students of the science who have made themselves most familiar 

 with this constantly increasing mass of information will most readily 

 admit that we are still very far from having arrived at any adequate 

 philosophy of vulcanism. Before such a philosophy can be framed 

 we shall need not only to undertake the comprehensive and exhaus- 

 tive study of the phenomena of active volcanoes which the manifold 

 appliances of modern science now render possible, but also to ascer- 

 tain as far as may be what has been the history of volcanic action 

 in the geological past. Modem volcanoes are the descendants of a 

 long succession of ancestors, and we shall never fully comprehend 

 the processes of which they are the result and evidence until we 



