GEORGE FREDERICK BARKER. xxiii 



It was only to be expected that one so able and active as he was 

 should become the recipient of many honors. Besides those already 

 mentioned, including positions of honor on important commissions 

 and the like, he was given the honorary degree of Doctor of Science 

 by the University of Pennsylvania in 1898, and in the same year, 

 the degree of Doctor of Laws from Allegheny College and also from 

 McGill University. He was elected a member of the National 

 Academy of Sciences in 1876 and later an honorary member of the 

 Royal Institution of Great Britain. He was also a member of scien- 

 tific societies in France and Germany. He attended many notable 

 educational and scientific meetings as a delegate from societies or 

 from the University which he so long served. He was assistant 

 editor of the American Journal of Science, from 1868 to 1900, and 

 contributed for a number of years accounts of the year's progress in 

 physics, to the annual Smithsonian Reports. 



Dr. Barker was married in 1861 to Mary M. Treadway, of New 

 Haven, who survives him, and had five children, of whom three 

 daughters are living. He was in his seventy-fifth year when he died 

 in Philadelphia, last May. 



Thus closed a life of great and varied service, one devoted to high 

 ideals — a striking example of industry and achievement, a life spent 

 in doing good. Thus ended the career of a lifelong student of 

 science of an exceptional range of accomplishment, an excellent 

 teacher, and a man of noblest aspirations. To those who knew him 

 well there remains the vivid remembrance of his sterling worth and 

 fine personal qualities. 



A list of his principal publications and papers is appended. 



Elihu Thomson. 

 SwAMPScoTT, Mass., 

 April, 191 1. 



