"Marryat-Scott Lift Planning Rule", card ready reckoner, 5th edition c. 1954 (first issued 1936), with instruction sheet
Details
- Category:
- Mathematics
- Object Number:
- 1990-719
- Materials:
- card
- Measurements:
-
overall: 3 x 27 x 120 mm
- credit:
- Science Museum (Great Britain)