Practical Tunnelling: Explaining in Detail, the Setting Out of the Works; Shaft-Sinking, and Heading Driving; Ranging the Lines, and Levelling Under Ground; Sub-Excavating, Timbering; and the Construction of the Brickwork of Tunnels: With the Amount of La. This item is unavailable.Practical Tunnelling: Explaining in Detail, the Setting Out of the Works; Shaft-Sinking, and Heading Driving; Ranging the Lines, and Levelling Under Ground; Sub-Excavating, Timbering; and the Construction of the Brickwork of Tunnels: With the Amount of La

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