Circular slide rule with lockable cursor arm
Circular slide rule with lockable cursor arm, plastic made by Lithocalculator Company, Calfornia, USA.
- Object Number:
- 1985-276 Pt2
- type:
- circular slide rule
Circular slide rule with lockable cursor arm
- Made:
- California
Circular slide rule with lockable cursor arm, plastic, in envelope with instructions: " Eckel dial rule", Engineers' Model, made by Lithocalculator Company, Calfornia
Details
- Category:
- Mathematics
- Object Number:
- 1985-276
- type:
- circular slide rule
- credit:
- Crosby, R.C.
