The Calcutta Canal route for boats extends eastward for about 115 miles to Khoohia, the capital of the Sunderbunds, and is situated at the junction of the rivers named the Atharabanka and Bhoyrab, respectively. The former is an offshoot of the Madhumatti, down which comes all the produce from the north; the latter carries all that which comes from Backergunge on the eastward. The total number of laden boats registered on the canals in 1874 was 77,096, and the total tonnage of all the cargoes imported into Calcutta by the Sunderbunds route was 521,000 tons. A large traffic is carried on along the three branches from the Ganges known as the Nuddeah rivers into Calcutta. In the years 1873-74 the total number of boats passing up and down was 32,887 and 27,242, conveying 378,200 and 323,000 tons respectively, of which over two-thirds was down traffic. The first canals met with in the Bengal series, other than the purely navigation lines, are those comprised in the Orissa Scheme. They are divided into three sections. The largest are those constructed in Orissa proper, the navigated portion measuring 162 miles, but when fully completed this system will extend to about 500 miles. There is a canal from Midnapore to Calcutta 70 miles in length, of which 53 miles are artificial, and the remainder follows the course of the Hoogly river. A canal about 30 miles in length has been cut at Hidgedee, in order to enable boats to escape the dangers of the lower reaches of the Hoogly. This canal is to be continued until it enables water communication to be established for the 250 miles that separate Calcutta and Cuttack. The canal varies from 120 to 60 feet, with a minimum depth of 6 feet, while the head locks and those on the main line are 150 feet by 20 feet. This canal cost 6200_l._ per mile, while the Orissa Canal is stated to have cost 3000_l._, and the Midnapore Canal 4400_l._ per mile, attributable specially to navigation. In Bengal there is a system of canals connecting with the river Ganges, which passes through the province of South Behar. There are three principal branches in this system—named the Patna, the Arrah, and the Buxar—their total length being 217 miles. On this system there were 8613 boats in 1882, the aggregate tonnage of which was 88,657 tons. Navigation is carried on in the North-west Provinces and on the Upper and Lower Ganges Canal. The Agra Canal, which leaves the Jumna eight miles below Delhi, has also been adapted for navigation.