A Treatise On The Principles And Practice Of Dock Engineering

348 DOCK ENGINEERING. „ . Scale, '/øoo F,^ iq o_______W______^_________^_______^ Fig. 313.— Graving Dock Entrance, River Tyne. I I Axls af Heelpost (Juu iber Sluice Chaitber Wa ter ^ Recess for ~''Chain pulleys ’Chamb er Water r Upper Transom. Transom -----42’ 9" --------------------* Fig. 320.—Elevation of Dock Gate at Dunkirk. V £ Fig. 321.—Plan. Tiie annexed table affords some statistics relating to difterent types of gate, collected from various sources. The writer is indebted in many cases to engineers at the several ports for the information.