Leadbetter slide rule
Modified Leadbetter slide rule by Dring and Fage. Wnglish, ca. 1800 No. 1938., Four Sided Slide Rule with Slides on each side, buy Peter Delahar
Dring and Fage Makers, Ltd.
||Leadbetter Slide Rule
3/4 x 12 1/8 x 1 1/8 in.
Hand calculation; Analog; Oughtred, William
Gwen Bell artifact and book collection
Gift of Gwen and C. Gordon Bell