F.142 Data Sheet MJS-p-0346

Hemmi, Triangulation, c.1940

Serial Number or Date Stamp:

Country: JPN Primary construction material: bb Case included?: yes

General Description: Specialty linear military slide rule

Length of 1 decade = 7 in, and overall scale length = 20 in. The largest physical dimension is 20 in.

Front Scales: cm /| e [ L N^1/3 N^1/2 _ T T2 N ] x ST || in

Back Scales: [ x2 logx2 S ]

Notes: Rare rule, no model number; possibly for aerial surveying; several log scales and hyper-extended trig scales; magnifying cursor; custom leather case with Chinese characters; Google Translate: Ninety-Seven Type Returning Center Slide Rule (Chinese – Taiwan).

References: https://sliderulemuseum.com/srtco/HemmiCat2.shtml

Date Acquired: 07/29/2024