Record

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Archive Reference / Library Class No.	NCB/A/BUT/13/10/18
Former Reference	N5/255
Title	Butterley Company correspondence file on general dirt percentages
Date	Jun 1939-Mar 1947
Description	Relating to the quality of coal for sale and analysis of percentages of dirt, including on types of cleaner for Ripley Colliery, June 1939-Apr 1940, analyses for the company's collieries, 1938-1940, sales analyses for Kirkby Colliery, Dec 1941-Feb 1943, sales analyses for the company's collieries, Dec 1943-Feb 1943, and correspondence on Ollerton Colliery's high dirt percentage, July 1945-Jan 1946.
Extent	1 file
Level	File
Repository	Derbyshire Record Office
Archive Creator	Butterley Company
Archive Creator	National Coal Board