![](https://coimages.sciencemuseumgroup.org.uk/130/235/large_thumbnail_cd0663_060_111004_lcmc_t270_metal_canister.jpg)
National Coal Board methane drainage pipe calculator with pouch
![National Coal Board methane drainage pipe calculator with pouch](https://coimages.sciencemuseumgroup.org.uk/213/212/medium_cd0385_065_080626_2002_19_485_3_lcm_circular_slide_rule.jpg)
National Coal Board methane drainage pipe calculator with pouch, c.1973.
Details
- Category:
- Coal Mining
- Collection:
- Lancashire Coal Mining Collection
- Object Number:
- Y2002.19.485.3
- Measurements:
-
195 mm,
- type:
- circular slide rule
- credit:
- Gift of Salford Museum and Art Gallery