550 Scientific Intelligence. 



conferred upon Julius Kuhn. The characterizations of prom- 

 inent men are terse but well done and there are many very good 

 portraits. The value of the book, which is strictly an outline, is 

 further enhanced by a classified bibliography and an index. 



H. D. H. JR. 



Obituary. 



Professor Henry Shaler Williams of Ithaca, N. Y., well 

 known for his valuable work in geology and paleontology, died 

 in Havana, Cuba, on July 31 at the age of seventy-one years. He 

 was born at Ithaca on March 6, 1847, was graduated at Yale 

 university with the degree of Ph.B. in 1868, and remained as 

 assistant in paleontology from 1868 to 1870; in 1871 he received 

 the degree of Ph.D. His first position as a teacher was as pro- 

 fessor of natural science at Kentucky University in 1871-72; 

 from there he went to Cornell University as professor of geology, 

 remaining at Ithaca until in 1892 he became Silliman professor 

 of geology at Yale. In 1904 he returned to Cornell as head of 

 the department of geology, which position he held until he 

 became emeritus in 1912. Much of his time has been spent dur- 

 ing recent years in Cuba, in part in the investigation of oil 

 fields. His contributions to science, and particularly to paleon- 

 tology on its broader side, were numerous and important; this 

 subject will be presented more fully in a later number. As an 

 associate editor of this Journal his work was of great value, 

 especially for the years following his appointment until he left 

 New Haven in 1904; for a year, beginning 1893, he performed 

 the duties of editor-in-chief with the unselfish devotion charac- 

 teristic of the man. He was a member of several prominent 

 geological societies and through the kindliness of his nature won 

 for himself a wide circle of friends. 



Professor John Duer Irving, who had since 1907 held the 

 chair of economic geology in the Sheffield S 'ientific School of 

 Yale University, died of pneumonia in July while serving his 

 country as instructor in an engineering camp in France. He 

 was in his forty-fourth year and had already made a wide repu- 

 tation in his own department, particularly with reference to the 

 subject of ore deposits. For a number of years he had been 

 editor of the journal "Economic Geology." His loss is a serious 

 one to the science of the country, as to the university with which 

 he was connected. 



Charles Christopher Trowbridge, assistant professor of 

 physics in Columbia University, died suddenly on June 2 in his 

 forty-ninth year. He had been connected with the teaching staff 

 of Columbia since 1892 and was especially known for his work in 

 ornithology. An important paper by him on "The Interlocking 

 of Emarginate Primary Feathers in Flight" was published in 

 this Journal for February, 1906 (vol. 21, pp. 145-169). 



