Name/Title
Rule, SlideDescription
Tool consists of 3 pieces ivory colored plastic; 3 pieces arranged vertically with top and bottom piece permanently attached by metal brackets at each end, the center piece slides back and forth by means of tonque & groove cutting, each of 3 pieces printed w/variety of numbers and graduated scales on both sides; also a metal piece w/clear plastic window on each side & fine vertical line in window that slides between brackets; comes in a black leather like carrying case.
Printed on one side is "Eugene Dietzgen Co., Pats. 2, 170, 144 2,285,722 Made in U.S.A.
References: American Heritage Dictionary of the English Language, 1973.
Device w/logarithmically scaled rules used to simplify multiplication/division to addition/subtraction; slide rules ceased to be functional in early 1970's when affordable pocket calculators came on the market.
Slide rule is 1988.033.001A and case is 1988.033.001BCollection
John KemperAcquisition
Accession
1988.033Source or Donor
John Thomas KemperAcquisition Method
DonationMade/Created
Notes
Date: mid 20th century
Made: Eugene DietzgenCreate Date
March 11, 2002Update Date
March 12, 2002