M.O. humidity slide rule, Mk5, MO 1729/56, Met Ref No 1665, in case. Date 1856
Details
- Category:
- Meteorology
- Object Number:
- 1995-1885
- Measurements:
-
box: 1.8 x 29.2 x 5.3 cm
- type:
- slide rule
- credit:
- Meteorological Office