ABSTRACT
JONES J.O. 10.09. 1884 Barrett KA/USA 02.02. 1982 Lawrence KS/USA Jacob Oscar Jones was educated at the University of Kansas, Kansas KA, receiving the BA degree, and at Cornell University, Ithaca, obtaining from there the MS degree. He was from 1911 a hydrologist at the Idaho Irrigation Company, then in 1912 became instructor in civil engineering at his Alma Mater, was there from 1915 to 1922 associate and associate professor, moving then in this position to University of Minnesota, Minneapolis MN, becoming in 1928 professor of hydraulics there until his retirement in 1955. He also was the Acting Dean of its School of Engineering and Architecture from 1943 to 1947. Jones was a member of the American Society of Civil Engineers ASCE. Jones has written several papers and a book in hydraulics. The 1917 paper deals with the effect of edge rounding on the outflow features from weirs and orifices. Currently, these edges are sharp-crested by standard, but at the time of Jones, this effect was not yet fully understood. Jones noted that the discharge coefficient increased by several per cents with the increase of edge rounding, yet he did not attempt to introduce a formula accounting for this effect, given the limited number of data collected. The described effect was found to be independent of the head on the orifice, but varies linearly with the ratio of the radius of rounding to the orifice diameter. The 1953 book is a basic account on hydraulics with usual chapters on pipe and open channel flows. In addition, the book includes chapters on centrifugal pumps, the impulse water wheel, and the reaction turbine. Anonymous (1947). Dean Jones. Jayhawker yearbook: 21. University of Kansas: Lawrence. P Anonymous (1964). Jones, Jacob O. Who’s who in engineering 9: 950. Lewis: New York. Anonymous (2001). Jacob O. Jones. M.E. Vibrations Alumni Newsletter, University of Kansas (9): 5-6. Jones, J.O. (1917). The effect on orifice and weir flow of slight roundings of the upstream edge. The Cornell Civil Engineer 26(2): 108-117. Jones, J.O. (1932). Inconsistent roughness coefficients. Civil Engineering 2(7): 454. Jones, J.O. (1937). Notes on the hydrology of Kansas. Kansas State Printing: Topeka. Jones, J.O. (1938). Discussion of Rainfall intensities and frequencies. Trans. ASCE 103: 372-379. Jones, J.O. (1940). Discussion of Functional design of flood control reservoirs. Trans. ASCE 105: 1669. Jones, J.O. (1953). Introduction to hydraulics and fluid mechanics. Harper: New York.
