| Description | Daily figures, 3 Jan 1960-30 Mar 1968, with saleable output weekly figures for weeks ending 6 Apr-2 Nov 1968. Recording statistics (in rows for each day of the month), with columns for date, panels (Low Main and Deep Hard seams, mine cars), pithead output, totals to date, saleable output (weekly figures), number of shifts and days, number of tubs, weight per tub, shifts worked (fillers, coal face, E/U, total underground, surface, total employed), hundredweights per man (fillers, coal face, underground, employed), and remarks, later used for what seem to be estimates of variable factors affecting output (joint O.M.S., variance from standard, disputes, difficult geological conditions, mechanical breakdowns, electrical breakdowns, absenteeism and other causes). |