Redmayne, RAS, Longmans Green & Co, 1922, HB, 475pp 2 x 2 volume set

2 volumes in 1. Volume I - Coal Its Occurrence, Value and Methods of Boring. Volume II -The Sinking of Shafts.. Volume III Methods of Working Coal Vol IV The Ventilation of Mines. Books contain numerous black& white plates, text drawings and charts to each volume(Good condition)