X
CONTENTS.
CHAPTER XI.—Graving and Repairing Docks.
VaRIOÜS METHODE OF EFFECTING RePAIRS TO SEIPS—CaREENING—BeACHING—
The Gridiron—The Slipway—The Hydraulic Lift—The Graving
Dock—The Floating Dock—Essential Reqüirements of a Repairing
Dépôt—Comparison of the various Types in regard to Aocessibility,
Ventilation, Light, Capacity, Initial Cost, Maintenance and Repairs,
Working Expenses, Durability and General Adaetability—Design
and Construction of Slipways — Foundation — Permanent Way —
Cradle—Sliding Slipways—Broadside Slipways—Stresses in Slipways
—Design and Construction of Graving Docks—Types of Floating
Docks—Process of Ovebhauling—Equipment of Repairing Docks—
Distribution of Pressure on Keel Blocks—Description of Gridirons
at Liverpool, Hydraulic Lift at London, Slipway at Dover, Graving
Docks at Bremerhaven, Liverpool, Glasgow, Barry, and London,
and Floating Docks at Cartagena and Bermuda,
CHAPTER XIL—Working Equipment of Docks.
Sources of Power—Compressed Air—Steam—Water under Pressure—
Electricity—Comparative Expenditure of Energy—Crane Tests—Cost'
of Power—Hydraulic Machineby—Systems of Electrical Distribution
—Applications to Dock Equipment—Gate Machinery—Power of Gate
Machines—Sluicing Machinery—Capstans—Quay and Floating Cranes
—Jiggers and Transporters—Coal Tips and Lifts—Grain Elevators
—Slipway Haulage—Dumping Installations—Petroleum Storage—
General Equipment—List of Appliances in Use at Hamburg, Havre,
and Liverpool, ........
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