Record

NCB - National Coal Board, later British Coal Corporation - 1574-1994
- A - Pre-Vesting Colliery Companies superseded by the National Coal Board - [1672]-1972
  - BUT - Butterley Company Colliery Offices - 1857-1960
    - 10 - Butterley Company Colliery Offices surveying records and plans - 1888-1939
      - 2 - Butterley Company survey reports on coal seams - 1891-1945

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Archive Reference / Library Class No.	NCB/A/BUT/10/2/6
Former Reference	N31/UL
Title	Interim report on Britain Colliery's Silkstone Seam
Date	May 1939
Description	Report by FF Ridley of Newcastle-upon-Tyne on the character and cleaning process of coal found in the seam. An attached letter suggests that the findings should be treated as an interim analysis and for this reason greater emphasis is placed on the production and marketing aspect of the site. Each subject heading is clearly separated. Diagrams and tables of the data are attached as appendices.
Extent	1 file
Level	Item
Repository	Derbyshire Record Office
Archive Creator	Butterley Company
Archive Creator	National Coal Board

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