Instructions for C-Thru Pocket Slide Rule

Description
This single sheet of paper was received with 1988.0807.02. It describes how to read the scales for two inexpensive student slide rules, the pocket-sized model 27 and ten-inch model 88, made by the C-Thru Ruler Company of Hartford, Conn. The postal code indicates a date between 1943 and 1963. The back of the sheet is stamped: GEORGE A. NORTON (/) 132 SWANN ROAD (/) WASHINGTON 23, D.C.
Location
Currently not on view
Object Name
sheet
date made
1943-1963
maker
C-Thru Ruler Company
Physical Description
paper (overall material)
Measurements
overall: 21.5 cm x 14 cm; 8 15/32 in x 5 1/2 in
place made
United States: Connecticut, Hartford
ID Number
1988.0807.06
accession number
1988.0807
catalog number
1988.0807.06
subject
Mathematics
Rule, Calculating
Education
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Slide Rules
Data Source
National Museum of American History, Kenneth E. Behring Center

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