Keuffel & Esser Instructions for Log Log Duplex Slide Rule

This eight-page pamphlet was received with 1981.0933.01. It is undated, but Clark McCoy reports the text was written around 1914. This copy was probably printed later, around 1920. It explains the scales on K&E's model 4092 slide rule, works eleven sample problems, and advertises K&E calculating devices.
Reference: Clark McCoy, ed., "K&E Log Log Duplex Slide Rules,"
Currently not on view
Object Name
date made
ca 1920
Keuffel & Esser Co.
Physical Description
paper (overall material)
overall: 22.3 cm x 14.6 cm x .1 cm; 8 25/32 in x 5 3/4 in x 1/32 in
place made
United States: New York, New York
ID Number
accession number
catalog number
Slide Rules
Science & Mathematics
Rule, Calculating
See more items in
Medicine and Science: Mathematics
Slide Rules
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of William J. Ellenberger

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