222 



aCIENCK 



[N. S. Vol. XI. No. 267. 



then treats of the chemico-geological rela- 

 tions between the latest geological forma- 

 tions, soils, and the more ancient deposits 

 which, after emergence, have been subject 

 to subaerial agencies. 



The American Devonian plaooderms. By E. 



W. Clatpole, Pasadena, Calif. 



Following a detailed discussion of the 

 structure and relationships of the principal 

 Devonian genera of North American placo- 

 derms, the author presented his views on 

 the habits, habitat, origin and migrations 

 of the great armor-clad forms. 



The Berkeley Hills — a detail of Coast Mange 

 geology. By Andrew C. Lawson, Berke- 

 ley, Calif. 



A discussion of the geological history and 

 fltructure of the hills in the vicinitj' of Berke- 

 ley, accompanied by a colored map on a scale 

 of 1 : 12,000 and six geological sections. 

 Andrew C. Lawson, 



Secretary. 



PROFESSOR HENRY ALLEN HAZEN* 

 By a sad accident on the evening of 

 Monday, January 22d, the Weather Bureau 

 lost one of its most prominent officials. Pro- 

 fessor Henry Allen Hazen, while riding 

 rapidly on his bicycle, hastening to his 

 night work at the Weather Bureau, collided 

 with a pedestrian and was dashed to the 

 ground. After lying unconscious for twenty- 

 four hours, he expired on the 23d. His 

 body is interred in the family burying- 

 ground at Deerfield, Massachusetts. 



Professor Hazen was born, January 12, 

 1849, in Sirur, India (about 100 miles east 

 of Bombay), the son of Reverend Allen 

 Hazen, a missionary of the Congregational 

 Church. He came to this country when 

 ten j'ears old and was educated at St. 

 Johnsbury, Vermont, and at Dartmouth 

 College, where he was graduated in 1871. 

 After this, he removed to New Haven and 

 * From advance sheets of the Monthly Weather Re- 



was for four years instructor in drawing in 

 the Sheffield Scientific School, and for four 

 years subsequent was assistant in meteor- 

 ology and physics under Professor Elias 

 Loomis. He was also privately associated 

 with the latter in meteorological researches 

 and the preparation of many of the 'Contri- 

 butions to Meteorology,' published by Pro- 

 fessor Loomis, some of which bear evidence 

 of the reflex influence of the student on the 

 master. 



In the spring of 1881, when the present 

 writer first saw Professor Hazen in New 

 Haven, the latter showed such an earnest 

 interest in meteorology as to justify recom- 

 mending him to the position of computer in 

 the ' Study Eoom' which was then being 

 organized by General William B. Hazen the 

 Chief Signal Ofificer, for the purpose of 

 developing the scientific work of the Bureau, 

 as a necessary adjunct to its important prac- 

 tical work. After his entry (May, 1881) 

 into the meteorological work of the Signal 

 Service, Professor Hazen took a prominent 

 part in this field. The special works as- 

 signed to him (such as the deduction of 

 altitude by railroad levels, the studj' of the 

 psychrometer, the proper exposure of ther- 

 mometers, the study of thunderstorms, an- 

 nual courses of lectures on meteorology), 

 were by no means sufiicient to absorb his 

 energies, and we find him branching off into 

 many other subjects, such as barometric 

 hypsometry and the reduction to sea-level, 

 the testing of anemometers, the study of 

 tornadoes and the theories of cyclones, 

 atmospheric electricity, balloon ascensions, 

 the influences of sunspots and the moon, the 

 danger lines of river floods, the sky glows 

 and the eruption of Krakatoa. His enthu- 

 siastic advocacy of the importance of the 

 balloon to meteorology was very highly ap- 

 preciated. His five ascensions (1886, June 

 24, 25; 1887, June 17 and August 13; 

 1892, October 27), undoubtedly gave very 

 accurate temperatures and humidities. 



