Folder of graphs and plans relating to workings of Eckington Collieries Graphs (5) showing proceeds per ton of disposable coal, costs per ton, profit or loss per ton,output per manshift, annual output and quota derived from standard tonnage, of Flockton Seam, for the years 1927-1939. Plans for (1) site of Eckington Collieries, 20 Jan 1939: (2) path of water from outburst at Holbrook through to Norwood, with section, 1 Jan 1936: (3) Norwood Colliery Flockton Seam, showing washout, with section, 6 Jun 1939 1936-1939