Yesterday these five earthmoving giants set off on the drive to the Snowy Mountains. They are the first of twenty-five ?12,000 Australian-built Tournapulls ordered for use by the Department of Public Works on the Adaminaby Dam project of the Snowy Mountains Scheme. These LeTourneau-Westinghouse machines, each capable of hauling 18 tons of earth and rock and capable of speeds up to 30 m.p.h., will be used on the 11,000,000 cubic yards of earth dam wall, 390 feet high, 2,200 feet thick at the base