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Title Manual: The Mannheim Slide Rule (Complete Manual) & Duplex Slide Rules. By William Cox. K&E, NY & Hoboken, [copyright 1891], ca. 1912-1915.
Object Name Manual, Training
Catalog Number 2010.023.0008
Collection Keuffel & Esser Company Collection
Credit Gift of Dr. Robert K. Otnes
Scope & Content The Mannheim Slide Rule (Complete Manual) and the Duplex Slide Rules. By Wm. [William] Cox. Published by Keuffel & Esser Co., New York & Hoboken, N.J., [copyright 1891], issued circa 1912-1915.

Booklet, 5-9/16" x 8-11/16" high, pp [ii], 52. Two holes punched in left margin.
Notes Copyright date and issue date are not necessarily the same. Date of issue is estimated and is based on: metal frame cursors are depicted; page 36 has an ad for the K&E Calculator (4018) which first appeared in the 1909 catalog; the Montreal branch house established 1908 is listed; text mentions slide rule no. 4096 which was not offered after 1915. Note cover code 'E' at top left corner. Page 1 has code at at top: No. 901, ka, a, cc.s, M.E. No printer's imprint found.
Date 1912-1913
Year Range from 1912
Year Range to 1913
Search Terms Keuffel & Esser Co.
K & E
Caption front cover
Imagefile 078\20100230008.JPG
Classification Business & Commerce
Manufacturing
Education