This is a Keuffel & Esser CO. K + E Log Log Duplex Trig Slide Rule Manual No. N4080 by Lyman Kells, Willis Kern, and James Bland. 123 pages. ©1948.
The outside and inside of cover have signature of Kermit Reed. I hope that a descendant of Mr. Reed (or Mr. Reed himself) will see this listing. I am guessing it is from his days as an undergraduate.
