|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|
|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.|
|Year Range from||1912|
|Year Range to||1913|
Keuffel & Esser Co.
K & E
Business & Commerce