HARBOR

a port or haven; which by its natural conformation or artificial construction affords safe refuge and anchorage to ships. A h. should be easily acce ible in any weather, and should have a sufficient depth of water at all tides; the majority of h’s, however, are tidal, and are provided with enclosed docks into which ve els enter at high tide. The dock gates are closed before the ebb, and a uniform level is thus maintained. Every effort is made to secure the utmost po ible depth of water, as it has been calculated that the value of a h. increases as the cube of the depth. The entrance to the h. must be proportiomed to the area, as upon this depends the tranquillity of the bh..