The Oconee and Ocmulgee rise near each other, in the N. of the State, flow through its centre to within 100 miles of the sea, when their united streams pass on S. E. to the Atlantic under the name of the Altamaha. Milledgeville, the former capital of Georgia, is on the Oconee, and Macon on the Ocmulgee. Darien on the Altamaha is reached by vessels drawing 11 to 14 feet of water. The Ogeechee, rising also in the north, is about 200 miles long. It drains the country between the Savannah and Altamaha, entering the Atlantic a few miles south of the Savannah. The Ogeechee is navigable for light vessels 30 or 40 miles, and for keel-boats to Louisville. The Santilla and St. Mary’s drain the south-eastern counties, and are each navigable 30 or 40 miles for sloops. The Flint, Ockloconee, and Suwanee drain the south-western counties; the Flint is navigable to Albany, 250 miles from the Gulf, for steamboats. The Tallapoosa and Coosa, head-waters of the Alabama, and the Hiawassee, one of the sources of the Tennessee, rise in the mountains of Georgia--the last, however, finding its way to the Gulf of Mexico by the Ohio and Mississippi valleys. Georgia has about 128 miles of sea-coast, but has few good harbors, except within the rivers emptying upon it. St. Mary’s, Brunswick, Darien, and Savannah are the principal. The chain of islands lying off the mainland produces the celebrated Sea-island cotton, but owing to the changes brought about by the secession war it is now little cultivated. These islands are flat, and generally little elevated above the sea. Cumberland island, one of the most attractive, is nearly 30 miles long. It is covered with magnificent forests of oak, and its shores are skirted with palms, palmettos, and tropical shrubbery. Other islands from S. to N. are Jykill, St. Simon’s, Sapello, St. Catharine’s, Ossabaw, and Cabbage. The Sea Islands, with the main shore, constitute a coast of 480 miles. St. Andrew’s, St. Simon’s, Altamaha, Doboy, Sapello, St. Catharine’s, and Ossabaw are the principal sounds.