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(This is a reproduction of a book published before 1923. T...)
This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. ++++ The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to ensure edition identification: ++++ A Study Of The Dispersion And Absorption Of Selenium August Herman Pfund University of Wisconsin--Madison, 1901 Physics
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He was born on December 28, 1879 in Madison, Wisconsin, United States, the eldest of at least five children of Hermann Pfund and Anna (Scheibel) Pfund. His father, a prosperous attorney, had emigrated from Switzerland in 1857 and had taught school before turning to the law.
August attended Madison public schools and the University of Wisconsin, from which he received a B. S. degree in 1901. He then studied physics at Johns Hopkins University under Prof. Robert W. Wood, whom he had known at Wisconsin, earning his Ph. D. in 1906.
He remained at Hopkins University for the rest of his professional career, beginning in 1906 as assistant in physics, rising to professor (1927), and serving as head of the physics department from 1938 until his retirement in 1947. Pfund chose as his principal field of research the infrared region of the electromagnetic spectrum, at that time a laboratory curiosity with little or no commercial use. His task was difficult, for he faced an almost complete lack of basic data. Advancing gradually on all fronts, using simple equipment, much of which he built himself, Pfund established, year by year, new benchmarks fundamental to the growth of infrared technology.
Working with one of his students, he discovered, by infrared spectrography, two of the five main series of lines of the hydrogen spectrum. Pfund's research established a firm foundation for the later rapid expansion of man's understanding of infrared radiation and for its application in fields as diverse as chemistry, astronomy, medicine, communications, industry, and military science. He himself took some interest in practical applications of his findings. He invented, for example, gold-coated glasses that would screen out ultraviolet and infrared radiation while remaining transparent, and he served as an industrial consultant to the Du Pont and New Jersey Zinc companies in devising quantitative techniques for studying paint pigments. For the latter company he also helped develop, during World War II, infrared devices for nighttime military use.
Although he worked for much of his life in the shadow of Robert W. Wood, one of the world's most able and ebullient scientists and a great showman, Pfund by the early 1930's had achieved worldwide renown among physicists for his basic discoveries and his absolute determinations of key physical constants. He was president of the American Optical Society in 1943.
Pfund died in a Baltimore hospital of myocardial infarction at the age of sixty-nine.
August Herman Pfund discovered two of the five main series of lines of the hydrogen spectrum - sometimes called the Pfund atomic hydrogen series. He also discovered new ways of producing infrared radiation, as well as methods of measuring its intensity, wavelength and polarization. Besides, he explored the behaviors of a great variety of solids, liquids, and gases in absorbing, reflecting, and refracting such radiation. He received the Edward Longstreth Medal of the Franklin Institute of Philadelphia (1922) and the Frederic Ives Medal of the American Optical Society (1939).
(This is a reproduction of a book published before 1923. T...)
Short and rotund, Pfund was a warm, friendly man, an accomplished raconteur with a lively sense of humor.
On August 30, 1910, Pfund had married Nelle Fuller, daughter of a newspaper-man of Lexington, Virginia. They had one child, Alice Elizabeth.
