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Title Manual: The Log Log Duplex Slide Rule. A Self Teaching Manual... Breckenridge. K&E, NY & Hoboken, [copyright 1926]
Object Name Manual, Training
Catalog Number 2010.023.0009
Collection Keuffel & Esser Company Collection
Credit Gift of Dr. Robert K. Otnes
Scope & Content The Log Log Duplex Slide Rule. A Self Teaching Manual with tables of settings, equivalents and guage points. By William E. Breckenridge. Published by Keuffel & Esser Co., New York & Hoboken, N.J., [copyright 1926], issued date circa 1920s.

Booklet, 5-5/16" x 7-7/8" high, pp [ii], 138, [2].

More specific date of issue to be determined.
Notes Copyright date and issue date are not necessarily the same.
Date 1926-1930
Year Range from 1926
Year Range to 1930
Search Terms Keuffel & Esser Co.
K & E
Caption front cover
Imagefile 078\20100230009.JPG
Classification Business & Commerce