William Jackson Humphreys
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William Jackson Humphreys (February 3, 1862, Gap Mills, West Virginia–November 10, 1949, Washington, D. C.) was an American physicist and atmospheric researcher.
Humphreys studied physics at Washington & Lee University in Virginia and at Johns Hopkins University, where he got his Ph.D. in 1897. He studied under H. A. Rowland, et al.
He worked in the fields of spectroscopy, atmospheric physics and meteorology. In the field of spectroscopy he found the shift of spectral lines under pressure. In atmospheric physics he found a very good model for the stratosphere in 1909. He wrote numerous books and had some teaching positions at universities. From 1905 to 1935 he worked for the U.S. Weather Bureau.
