402 
HENRY ALLEN HAZEN. 
Professor Hazen was born January 12,1849, in Sirur, India, 
about 100 miles east of Bombay, the son of Rev. Allen Hazen, 
a missionary of the Congregational Church. He came to this 
country when ten years old, and was educated at St. Johns- 
bury, Vermont, and at Dartmouth College, where he was 
graduated in 1871. After this he removed to New Haven, 
Connecticut, and for four years subsequent was assistant in 
meteorology and physics under Prof. Elias Loomis. He was 
also privately associated with the latter in meteorological 
researches and the preparation of many of the Contributions 
to Meteorology published by Professor Loomis, some of 
which bear evidence of the reflex influence of the pupil on 
the teacher. 
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 recommending 
him to the position of computer in the study-room, which 
was then being organized by Gen. W. B. Hazen, the Chief 
Signal Officer, for the purpose of developing the scientific 
work of the Bureau, as a necessary adjunct to its important 
practical work. After his entry, May, 1881, into the mete¬ 
orological work of the Signal Service, Professor Hazen took a 
prominent part in this field. The works specially assigned 
to him were by no means sufficient to absorb his energies, 
and we find him writing and publishing on many 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 influence of sun spots and the moon, the 
danger lines of river floods, the sky-glows and the eruption 
of Krakatoa. His enthusiastic advocacy of the importance 
of the balloon to meteorology was very highly appreciated. 
Plis five ascensions (1886, June 24-25; 1887, June 17 and 
August 13; 1892, October 27) undoubtedly gave very accu¬ 
rate temperatures and humidities. After the death of Gen¬ 
eral Hazen and during the administration of General Greely 
the computers of the study-room became junior professors at 
