||Etched on right end of slide
||Donor's ID number for rule. On gummed label on back.
overall: 1 5/8 in x 21 in x 5/8 in
Object is a standard slide rule. The scales are labeled E A B R C D. One edge has an inch scale, and one has a centimeter scale.
Pre-computer: slide rule
Gift of Mike Konshak