Instruction Manual for Pickett & Eckel Deci Log Log Slide Rule

This 32-page booklet was received with 1979.0601.02. Its citation information is: Maurice L. Hartung, How to Use the Deci Log Log Slide Rule (Chicago: Pickett & Eckel, Inc., 1947). Hartung, a University of Chicago professor and consultant to Pickett & Eckel, provided a basic overview of mathematical operations on the slide rule. He then explained placing the decimal point; the inverted scales; scales for squares and cubes, logarithms, and trigonometry; and solving problems using multiple scales. He next described the log log scales in a section that has several diagrams of slide rules.
A pink paper sheet on caring for the slide rule is inside the booklet. A previous owner has written in a few corrections, including an updated population of the United States of 175 million in 1957.
Currently not on view
Object Name
date made
Pickett Industries
Hartung, Maurice L.
Physical Description
paper (overall material)
overall: 21.2 cm x 13.7 cm x .2 cm; 8 11/32 in x 5 13/32 in x 3/32 in
place made
United States: Illinois, Chicago
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 Frank M. Graves

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