Advertising Leaflet for Kidjel Ratio Cali-Pro

This yellow fold-out leaflet was received with MA*333876. It provides instructions for the Cali-Pro, a proportional divider developed by Maurice Kidjel for making drawings in what Kidjel believed was the "universal ratio," 5.333 : 1. Kidjel and his business associate, Kenneth W. K. Young, filled orders for the device from an office in Honolulu, Hawaii. The leaflet contains examples of applications and testimonials. It was copyrighted in 1962.
Currently not on view
Object Name
date made
Kidjel, Maurice
Young, Kenneth W. K.
Physical Description
paper (overall material)
overall: 7.7 cm x 15.2 cm; 3 1/32 in x 5 31/32 in
place made
United States: Hawaii, Oahu, Honolulu
ID Number
accession number
catalog number
Science & Mathematics
Drawing Instruments
Dividers and Compasses
See more items in
Medicine and Science: Mathematics
Dividers and Compasses
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Transfer from U.S. Department of the Treasury, Internal Revenue Service, Publications Department
Additional Media

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