388 Scientific Intelligence. > 



of course only invented the name, but he is widely credited with 

 being the first to announce the principle. 



After the organization of the present Survey, Dutton was 

 detailed to serve with it and, in a position nominally new, he 

 continued to act with the associates of earlier years. In 1884 

 he examined Mount Taylor and the Zuni Plateau, his memoir 

 appearing the next year. This gave him an opportunity to 

 modify, in the light of recent discoveries, some of his earlier 

 views of the region. 



After the completion of his Plateau studies Dutton's most 

 important contribution to geolog}^ was his study of the Charles- 

 ton Earthquake of 1886. In one respect he then had a unique 

 opportunity. Clock time was standardized in the United States 

 in 1883 and the Charleston earthquake was the first of conse- 

 quence to occur in a region where clocks kept the same time or 

 comparable time. Thus the observations of shock on that occa- 

 sion could be coordinated as in no previous case and of this 

 Dutton made full use. His method of ascertaining the depth of 

 the hypocentrum is a somewhat rough one, but there is no reason 

 to doubt that it gives the order of magnitude of the quantity 

 sought in cases in which the shock maybe regarded as emanating 

 from a restricted space or area. 



Dutton returned to military duty in September, 1890, but did 

 not abandon his interest in geology. He took the occasion of 

 furloughs to visit Mexican volcanoes as in earlier times he had 

 visited Hawaii and thus collected much of the material for his 

 last important work, " Earthquakes in the light of the new Seis- 

 mology," 1904. This book shows Dutton at his best. It is 

 excellent reading and contains much information, but it is far 

 from being exhaustive and cannot be regarded as an adequate 

 presentment of the subject at the time of its publication. 



George P. Becker. 



Professor Thomas Harrison Montgomery, Jr., of the Zoolog- 

 ical department of the University of Pennsylvania, died on March 

 19 at the age of thirty-five years. Although a youug man he had 

 already published a large number of papers on biological subjects 

 and was the author of a work entitled "Analysis of racial descent 

 in Animals," 



Professor John Bernhardt Smith, of Rutgers College, and 

 since 1894 State Entomologist of New Jersey, died on March 12 

 in the fifty-fourth year of his age. He was the originator of many 

 of the modern methods of fighting the mosquito pest by drain- 

 age of swamps in which the insects breed. 



Professou Ralph S. Tarr, of the department of Physical 

 Geography at Cornell University, died suddenly at his home in 

 Ithaca on March 21; he was forty-eight years old. A notice is 

 deferred. 



