Instruction Manual for Charles Bruning Model 2401 Slide Rule

The citation information for this 16-page pamphlet is Charles Bruning Company, Inc., Instruction Manual for Bruning Slide Rule No. 2401 (New York, 1944). The cover notes that the company had applied for a patent on a slide rule indicator, but no such patent has been found. The manual begins with the claim that results on model 2401 were significant to three digits. After explaining the parts of a slide rule, the manual divides the process of learning to use a slide rule into twelve steps, each of which are discussed with examples, solutions, and exercises in the remainder of the pamphlet. This manual was received with 1991.0445.03.
Currently not on view
Object Name
date made
Charles Bruning Company, Inc.
Physical Description
paper (overall material)
overall: 22.5 cm x 14.5 cm; 8 27/32 in x 5 23/32 in
place made
United States: New York, New York
ID Number
accession number
catalog number
Rule, Calculating
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Slide Rules
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Gift of Richard R. Lombardi

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