calculator; methane flow

Maker
Fearns Calculators
Description
Methane flow calculator used in coal mining. White black and red calculator with blue wallet. See location notes.
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Object detail

Department
Object
Maker
Production place
Whickham/Newcastle-Upon-Tyne/Tyne And Wear/England
Signature & date
printing:face:"National Coal Board Methane Flow Calculator" [with instructions and scales]
Subject person
Measurement type, part and reading
Dimensions:0 - Whole:Dia 14.3cm (Dia 5 5/8")
Accession number
1994-038-014

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