Object Record

Keuffel & Esser Polyphase Duplex Decitrig Slide Rule, Model 4071-3

Catalog Number	10.0010.001
Title	Keuffel & Esser Polyphase Duplex Decitrig Slide Rule, Model 4071-3
Collection	Harry Blum Collection
History	Harry Blum was a mathematician who worked at the NIH Lab of Statistical and Mathematical Methodology in the Division of Computer Research between 1967 and his retirement in 1982. During this time, Blum sought to map out a "new geometry for biology" and develop applications for this geometry, as well as developing a set of "new principles of organization for sensory integration in the central nervous system." He collaborated on projects involving shape physchophysics, retinal neurophysiology, and the development of the human mandible. Before joining NIH, Blum served with the U.S. Navy during World War II at the New York Naval Shipyard, worked as an electrical engineer for the New York City Subway system, as a research assistant at Cornell University, where he received his B.S. in Engineering in 1950; then served as a civilian employee at the U.S. Air Force's Rome Air Development Center from 1950-58, researching radar systems including ballistic missile warning radars. Between 1958 and 1960, Blum worked at NATO's SHAPE Air Defence Technical Center in the Hague, Netherlands, where he worked on problems of ballistic missile defense. Between 1960 and 1967, he worked at the Data Sciences Lab of the Air Force's Cambridge Research Labs in Bedford, Mass, where he began the work that he continued at the NIH.
Description	.01 Slide rule, model 4071-3 .02 Leather case .01 Slide rule with center slide and a wide glass indicator with steel brackets in L-shapes. .02 Orange leather case with "K&E" stamped on the flap. The loop has metal edges with the patent number stamped in it.
Date	c. 1939
Organizations	NIH; Division of Computer Research and Technology
Buildings	Building 6
NIH Property #	none
Old NIH Property #	none
Serial #	596188
People	Blum, Harry

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Object Record