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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 |
| National Coal Board |
| Format | Document |
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