Advertising Pamphlet for Otis King's Pocket Calculator

The cover of this eight-page pamphlet is blue and black. It reads: HOW THE (/) OTIS KING (/) SPIRAL (/) SLIDE RULE (/) SAVES TIME (/) AND MISTAKES (/) IN ALL (/) CALCULATIONS (/) SIMPLE (/) QUICK (/) ACCURATE. The text describes the features and advantages of the Otis King cylindrical slide rule. Drawings demonstrate the three steps required to make calculations with the instrument. The pamphlet also lists 13 sample problems the Otis King Pocket Calculator could solve, 37 companies that were major customers of the rule, and 50 professions that usefully employed the rule. The back page carries five anonymous testimonials.
This pamphlet arrived with 1981.0922.09 and 1981.0922.11. It is exactly the same as 1989.3049.04, except that it is not stamped with information about where the rule was purchased.
Currently not on view
date made
Carbic Limited
place made
United Kingdom: England, London
Physical Description
paper (overall material)
overall: 22.3 cm x 10.3 cm; 8 25/32 in x 4 1/16 in
ID Number
accession number
catalog number
Credit Line
Gift of John White
Rule, Calculating
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Slide Rules
Data Source
National Museum of American History