The northern slope of this great plateau is drained by the AraguayaTocantins, Xingu, Tapajos and Guapore-Mamore-Madeira, which flow northward, and, except the first, empty into the Amazon; the southern slope drains southward through a multitude of streams flowing into the Parana and Paraguay.
25), is to be seen at the south-west corner of the city; it is an enormous excavation in the rock with drains in its sides, at the bottom of which there is now a flourishing orange garden.
It grows in marshes, ditches, pools and drains in meadows, and sometimes obstructs the flow of water with its dense matted roots.
The two sources together drain the region south as the Euphrates drains the region north of the Taurus mountains.
In the extreme west, which is as yet but slightly explored and settled, there is an extensive depressed area, largely saline in character, which drains into lakes and morasses, having no outlet to the ocean.