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122 THE surface to hold the sliding ways in position, A center way was also. provided for a certain distance to carry the stern of the vessel where the engines and boilers were situated and where the lines of the hull did not allow the stern to be supported on the side ways. coe The sliding ways carrying the cradle, 210 feet in length, were also of oak, a center way 75 feet in length being also provided to carry the stern of the vessel where ‘the greatest eweight was concentrated. Timbers 12x12 inches x24 feet long were laid across the sliding ways at 10-foot centers with short blocks in between so that the vessel would be supported by blocking at 5-foot cen- ters throughout the length of the cradle. Allows Liberal Margin This blocking was carried up to a height of 4 feet above the standing ways at the after end of the cradle and 2 feet 6 inches at the forward end, these heights being fixed by the draft of the vessel fore and aft and the estimated elevation of the tide on the day fixed for the _ hauling operation, A margin of 2 feet was allowed between tide and draft for clearance and vagaries of tides which were found to vary considerably from the -tide tables when the wind was in certain directions. During the construction of the slipway, a large gang was employed cutting away and removing all parts of the vessel not required in the re- construction. The engines and boilers, THE MORNING AFTER THE VESSEL WAS HAULED AND DRY, READY FOR THE MARINE REVIEW March, 1919 STERN VIEW OF THE VESSEL—SHE WAS STRIPPED OF BULWARKS, BRIDGE DECK AND ALL TOP HAMPER DOWN however, remained in position and the total weight when placed on the cradle was approximately 1000 tons. The dimensions of the vessel were 233 feet between perpendiculars and 39-foot beam. A somewhat difficult problem to solve was the pull required to over- come the initial inertia’ on greased’ ways on a 4 per cent grade though it was considered that once this inertia was overcome the coefficient of friction would not be higher than 0.10 which on the 4 per cent grade represented ~a total’ pall'/of. about OUT OF THE WATER—AS SHE RESTED HIG! RECONSTRUCTION WORK TO THE MAIN DECK 140 tons. This difficulty, however, was. successfully overcome in the manner described. The hauling engine and drum were bolted down to a heavy concrete foundation weighing approximately 150 tons and also anchored back with 134-inch_ steel rods. Two 2'%-inch steel cables were attached to the rear end of the cradle and_ passed forward beneath the cradle to the forward end where they were shackled to two heavy 4-sheave steel blocks; 7%-inch steel cables were reaved over three sheaves in each block making a 7-part line on either side extending to similar blocks fixed in front of the winding drum. The distance be- tween the blocks was 313 feet, each cable being 2500 feet long. Cradle Weighted in Place The cradle was erected in position at the lower.end of the ways and weighted with. rails and rock, three timber uprights bolted on one _ side, 50 feet apart and exactly 19 feet 6 inches from the center line, acting as guides for bringing the vessel into correct position. A fourth upright was fixed on the center line 23 feet forward of the cradle for locating the position of the bows. The high tide occurring at’ night made the operation a more difficult one. The vessel was warped into position by cables attached to the wharf on one side and to an anchor and tug on the other. At 8 p. m. high tide was over the submerged cradle, at 8:45 the bows had settled on the blocks at the forward end and (Concluded on Page 131)