8vo - 24.5 x 16 cm.; xlviii - 584 - v - 219 - 62 pp. Maroon cloth over boards with gilt lettering on spine and front. Blind stamped border rules on front and back. This is copy #264 and printed by order of the Legislative Assembly of Ontario. Illustrated with many black and white photographs, charts, fold-outs, graphs and includes the three maps / drawings in a back pocket as issued: 1 - "Geological Map of Creighton Mine . . .", 2 - "Plan and Lay-out of Reverberatory Department, 1915 . . . Copper Cliff . . .", 3 - "Plan and Lay-out of Blast Furnace and Converter Department, 1915 . . . Copper Cliff . . .". All 3 are in a very good to fine condition. Minor wear to the externals and with rubbing to the front spine joint, previous owner's name on the front free end paper, the front and back hinge are starting though still sound.