Undulating movement. Height of the waves, and depth at which the agitation is perceptible. Effects of the waves on the coasts. Tides; spring-tides; neap-tides. Height of tides and hour of flood. General currents. Action of the sea on its shores. Protection of level and steep shores.
19th. Sea-ports. Requisites of a good port. Ports in the Mediterranean. Conditions of a good roadstead. Moles and breakwaters. Ocean ports, channel tide-dock, floating dock, and sluice of floating dock, laying-up dock, and sluice for the ditch of fortifications. General arrangement of a harbor.
20th. Construction of moles. Stones dropped for foundations. Profile of a loose heap. Volume of the materials which insure their stability. Settling of masonry resting on a heap. Instances of masonry constructed at sea. 1. Wall of Cherbourg. 2. Fort Boyard.
Piers.—Direction, length, form of interval between, and profile of piers. Their construction. Passages reserved through piers.
RECAPITULATION.
| First Part.— | Parts of Buildings | 18 | |
| Second Part.— | Architecture of Military Buildings | 12 | |
| Third Part.— | First Section. Resistance of Materials, | 6 | 15 |
| Second Section. Stability of Constructions, | 9 | ||
| Fourth Part.— | Hydraulic Constructions, | 20 | |
| Total | 65 |
[WORKS OF APPLICATION.]
Art Artillery.
Eng Engineers.