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- A - Pre-Vesting Colliery Companies superseded by the National Coal Board - [1672]-1972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
    - 13 - Butterley Company Colliery Offices records on the development of collieries - 1895-1947
      - 8 - Butterley Company Colliery Offices correspondence files on the development of pit supports and other mining equipment - 1929-1947

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Archive Reference / Library Class No.	NCB/A/BUT/13/8/1
Former Reference	N5/251
Title	Butterley Company correspondence file on research into supports for workings in mines
Date	Jun 1929-Dec 1931
Description	Relating to the testing of Dynanometer props at Lowmoor Colliery, involving research undertaken on behalf of the Support of Workings in Mines Committee, Jun 1929-May 1930, and windings rope capel, Nov-Dec 1931
Extent	1 file
Level	File
Repository	Derbyshire Record Office
Archive Creator	Butterley Company
Archive Creator	National Coal Board

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