The AUTHORS showed a number of lantern-slides relating to the work. Pigs. 20 showed an accident to one of the lock-gate machines which happened when a ship was in the lock. It was due either to a porous place in the liner or to defective end-joints. Unfortunately it took a considerable time to obtain a sufficiently sound casting to replace the liner. The gunmetal rings shown in the lower diagram were then fitted t o all the gate-machines to strengthen the endjoints. Pig. 21 showed an alternative method to that given in the Paper for fixing the mitre-post to the gate steelwork. The bolt had a differential thread which enabled the timbers to be tightened up inside the gate when immersed, and it was hoped to get watertight bolts without jamming the threads in the welded thimbles.The tail-press to the heavy steel bridge, referred to on p. 310, was Downloaded by [] on [11/09/16].
in reply, stated that fresh water was used for gauging the test briquettes. The local cement was manufactured by the dry process in a rotary plant supplied by Messrs. Smidth and Company, of Copenhagen, the cylinder of which was 72 feet long and 6 feet in diameter. The calorific value of the fuel used in burning the clinker was 6,380 calories per pound, and its average analysis was :-Volatile matter 27-20
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