The feature of the tide that makes the most marked impression is undoubtedly that relating to the extent of rise and fall or range of tide. Ranges of 10 feet or more occur in various regions throughout the world; ranges of as much as 20 to 30 feet are found at a number of places; and in the upper part of the Bay of Fundy we find ranges of 40 to 50 feet. Where such large ranges occur, the tide is an impressive phenomenon, visualizing in striking fashion the ceaseless warfare between land and sea. Wide stretches of sand, mud flats, or shingle constitute the field of war. At low water these are apparently part of the land. But a few hours later—at high water—the invading tide claims them again as part of the dominion of the sea.
The Tide at Annapolis
By H. A. Marmer, U. S. Coast and Geodetic Survey