F.239 Data Sheet MJS-p-0127

back to Collection Data Sheets

Lawrence, 10-N, c.1946

Serial Number or Date Stamp:

Country: USA

Primary construction material: wd

Case included?: no

General Description: Specialty linear ratio/proportion slide rule

Length of 1 decade = 6.5 in, and overall scale length = 6.5 in. The largest physical dimension is 10 in.

Front Scales: D [ C pica ] pica

Back Scales:

Notes: Lawrence Printer’s Proportion Rule; Peru, IN

References: http://sliderulemuseum.com/Lawrence.htm; JOS Vol. 5 pp. 55-61

Date Acquired: 08/01/2020