CHATTANOOGA, a city of the United States, in the county of Hamilton, Tennessee, about 250 miles by water from Knoxville, at the foot of Lookout Mountain, on the left bank of the Tennessee river, which is navigable for steamers during eight months of the year. It has free communication by four railway lines, and carries on a pretty extensive trade in the produce of the surrounding district, which is well supplied with timber, iron-ore, and coal. Among its industrial establishments are saw-mills and wood-work factories. In 1862 and 1863 the Confederates were defeated here by the Federal forces under General Grant. Population in 1870, 6093, of whom 2221 were coloured.