"At this dock, Plate 45 (left), are twenty-one coal-tips, of which fifteen are on the dock and six on the basin. Eight of the tips on the dock and two on the basin are as originally constructed when the dock was made. Of the remaining tips on the dock three were erected by Messrs. Armstrong, Mitchell and Co. in 1893, and four by Messrs. Tannett, Walker and Co. in 1905-1906. Four of the basin tips were constructed by Messrs. Fielding and Platt in 1899-1900. Very little need be said of the original tips erected with the dock They are worked from a high-level road, and the wagons can be tipped from any height between 3 to 19 feet above the quay-level, or 29 feet above water-level when there is 32 feet of water on the dock-sill. The tips are built of timber and are illustrated in Plate 46 (left). The weight of the cradle and empty wagon is counterbalanced by weights suspended on four wire-ropes; and the ends of these ropes are wound on pulleys carried on two cross-shafts. Brake wheels are fixed to the shafts and the hand-brake, which is of the usual design, is worked from the platform of the tip. The tipping platform is raised by side chains which pass over pulleys at the top of the tip and down to the ram at the side.