The harbors of North and South Carolina are generally bad. That of Charleston is obstructed at its entrance by a dangerous sand-bar; that of Georgetown will admit only small craft. The harbor of Beaufort or Port Royal is the best in the state, but is little frequented. The largest bays of Florida are those of Apalachicola, St. Andrew’s, Ochlockney, and Pensacola. Alabama has but about sixty miles of seacoast, containing the spacious Bay of Mobile, which extends thirty miles inland. It has two principal entrances, one of which has eighteen feet depth of water. To the west it communicates by a shallow passage with the Bay of Pascagoula, which lies within a number of islands, on the coast of this state and Mississippi.
II. SOUNDS.
Long Island Sound is an extensive gulf or channel, from three to twenty-five miles broad, and about one hundred and forty in length, extending the whole length of Long Island, and dividing it from Connecticut. It is narrow at the eastern entrance, and expands in the middle; it communicates with the ocean at both ends. Towards the west it contracts gradually, till it joins the harbor of New York by a narrow and crooked strait. It admits of a free navigation throughout its whole extent for the largest ships, exceptat the celebrated passage called Hell Gate,[30] situated near the west end of this sound, about eight miles from the city of New York. It is a very singular strait, about three or four hundred yards in breadth, having a ledge of sunken rocks across it in an angular direction, which occasions many whirlpools and cross currents in the water. These, at certain periods of the tide, make a tremendous noise, and render a passage impracticable; but at other times the water is smooth, and the navigation easy.
Pamlico Sound is a kind of a lake or inland sea, from ten to thirty miles broad, and seventy miles in length. It is separated from the Atlantic ocean, in its whole length, by a beach of sand hardly a mile wide, generally covered with trees or bushes. Through this bank are several small inlets, by which boats may pass; but Ocrecock Inlet is the only one that will admit vessels of burden. This inlet communicates with Albemarle Sound, which is also a kind of inland sea, sixty miles in length, and from four to fifteen in breadth, lying north of Pamlico Sound. Core Sound lies south of Pamlico, and has a communication with it. These sounds are so large, when compared with their inlets from the sea, that no tide can be perceived in any of the rivers which empty into them, nor is the water salt, even in the mouths of these rivers.
III. GULFS.
Gulf of Mexico.—The Gulf of Mexico washes the shores of Florida, Alabama, Mississippi, and Louisiana, on the side of the United States. It extends between the eighteenth and thirtieth parallels of north latitude, and is nearly of a circular form, but somewhat elongated from east to west. In the latter direction it is one thousand one hundred and fifty miles long; in the transverse direction it is about nine hundred and thirty. It opens in a south-east direction, between the peninsula of Yucatan and Florida, or the capes Catoche and Sable, which are about four hundred and sixty-five miles distant from each other. The Island of Cuba divides this opening into two channels: the one to the south-west, communicating with the Sea of the Antilles, and the other to the north-east with the Atlantic, by means of the Straits of Bahama or Florida. South from the mouth of the Rio del Norte, round about the mouth of the Rio Alvarado, an extent of six hundred miles, this gulf does not present a single good port, as Vera Cruz is merely a bad anchorage amidst shallows. The Mexican coast may be considered a sort of dike, against which the waves, continually agitated by the trade-winds blowing from east to west, throw up the sands carried by the violent motion. The rivers descending from the Sierra Madre, have also contributed to increase these sands, and the land is gaining on the sea. No vessels, says Humboldt, drawing more than twelve and a half inches water, can pass over these sand-bars without danger of grounding.
The Mississippi is the principal tributary of the Gulf of Mexico, and carries down with it, besides its vast body of waters, a prodigious quantity of organic and unorganic debris. The town of New Orleans, near the mouth of this river, is the principal commercial station along the whole gulf. In the middle of the gulf the winds blow regularly from the north-east; but they vary considerably on approaching the shore. From the Mississippi, along the Florida coast, the south-west wind blows violently in the months of August, September, and October; the north wind prevails during the other nine months. Between the Mississippi and San Bernardo, the wind generally blows in the morning from the south-east or east-south-east, and in the evening from the south-west. Between Catoche and Campeachy the reigning wind, during a great part of the year, blows from the north-east; but from the end of April to September, it comes from the opposite direction. The most remarkable current in the gulf, is that called the Gulf Stream, described in the following chapter.
GENERAL REMARKS ON BAYS.