At Anderton, on the Trent and Mersey Canal, there is a vertical hydraulic lift which raises or lowers two narrow boats 50 feet to enable them to pass between the canal and the River Mersey, the operation being done by means of troughs 75 feet by 14-1/2 feet. Inclined planes have also been made use of to avoid a multiplicity of locks. It is assumed that in the event of any general scheme of resuscitation being undertaken, the present flights of locks would, in many instances, be done away with, hydraulic lifts being substituted for them. Where this could be done it would certainly effect a saving in time, though the provision of a lift between series of locks would not save water, as this would still be required for the lock below. Hydraulic lifts, however, could not be used in mining districts, such as the Black Country, on account of possible subsidences. Where that drawback did not occur there would still be the question of expense. The cost of construction of the Anderton lift was £50,000, and the cost of maintenance is £500 a year. Would the traffic on a particular route be always equal to the outlay? In regard to inclined planes, it was proposed some eight or ten years ago to construct one on the Birmingham Canal in order to do away with a series of locks at a certain point and save one hour on the through journey. Plans were prepared, and a Bill was deposited in Parliament; but just at that time a Board of Trade enquiry into canal tolls and charges led to such reductions being enforced that there no longer appeared to be any security for a return on the proposed expenditure, and the Bill was withdrawn. In many instances the difference in level has been overcome by the construction of tunnels. There are in England and Wales no fewer than forty-five canal tunnels each upwards of 100 yards in length, and of these twelve are over 2,000 yards in length, namely, Standidge Tunnel, on the Huddersfield Narrow Canal, 5,456 yards; Sapperton, Thames and Severn, 3,808; Lappal, Birmingham Canal navigations, 3,785; Dudley, Birmingham Canal, 3,672; Norwood, Chesterfield Canal, 3,102; Butterley, Cromford, 3,063; Blisworth, Grand Junction, 3,056; Netherton, Birmingham Canal, 3,027; Harecastle (new), Trent and Mersey, 2,926; Harecastle (old), Trent and Mersey, 2,897; West Hill, Worcester and Birmingham, 2,750; and Braunston, Grand Junction, 2,042. The earliest of these tunnels were made so narrow (in the interests of economy) that no space was left for a towing path alongside, and the boats were passed through by the boatmen either pushing a pole or shaft against the roof or sides, and then walking from forward to aft of the boat, or else by the "legging" process in which they lay flat on their backs in the boat, and pushed with their feet against the sides of the tunnel. At one time even women engaged in work of this kind. Later tunnels were provided with towing paths, while in some of them steam tugs have been substituted for shafting and legging.