THE MISSISSIPPI BASIN. 389 h Just above the falls of Niagara the river is about a mile wide. Below this point the stream narrows and plunges over a precipice about one hundred and fifty feet in height. Below the falls the river flows in a wide, rocky gorge. The water that in a single minute makes the leap of Niagara would fill a box fifty feet wide, fifty feet high and more than a mile long. A canal has been made between Lake Erie and Lake Ontario, and ships can go back and forth, without sailing upon the Niagara river. 62. The Mississippi Basin. What large river basin is south of the Height of Land ? In what general direction does this basin slope ? _ Into what body of water does the Mis- sissippl river flow ? What bounds the basin of the Missis- sippi on the west? On the east? On the north ? What large river from the west flows into the Mississippi? Where does the Missouri river rise ? Niagara Falls. In what direction does the Ohio river flow? Into what does it flow ? Where are the prairies? Where are the western plains? Where are the southern plains ? The vast plains that spread round the Great Lakes on nearly all sides are called prairies. The soil in most places is deep and fertile. Mile after mile of nodding cornflower, mile after mile of waving wheat, grassy fields dotted with sleek cattle, — these are some of the sights on the prairies in summer. : Mile after mile of drifting snow, mile after mile of frozen ' the sights on the prairie in winter. Prairie Scenes in ‘Winter and Summer, 6