40 The southern plains are very fertile, and they are warmer than the prairies. A great deal of corn is raised on these plains. Here, also, are vast fields of cotton. What have you learned about the growth of this useful plant ? \ Cotton Market.. Perhaps some of the clothing which you now wear is made of cotton that grew on the southern plains. What have you read about the western plains ? 63. North of the Height of Land. Where is Hudson bay? A large river flows into Hudson bay, and another flows into the Arctic ocean. The basins of these rivers are mostly in cold regions. Northwest of the Great Lakes there are broad prairies, with many rich grainfields. 64. Appalachian Highland. What highland is on the east of the Mississippi basin? Is it higher or lower than the Rocky Mountain high- land ? Why are there no very large rivers east of the Appalachian highland ? The mountains of the Appalachian high- Jand are not very high. They consist chiefly of long rounded ridges or folds. ATLANTIC SLOPE. 65. Atlantic Slope. Many short rivers flow across the narrow plains east of the Appalachian highland. Some of these streams are deep enough to float large vessels. The slope east of the Appalachian highland is called the Atlantic slope. Where is the Hudson river ? The largest city in America is at the mouth of the Hudson river. Find out at home all you can about this city, — its long bridge, its great statue, its bay and its park. 66. Pacific Slope. The slopes west of the Sierra Nevada and Cascade ranges are short, and some of them are very fertile. A low range lies near the shore of the Pacific. It is called the Coast range. ‘The picture on page 9 shows a very small part of the Pacific slope. This part is not very far from the southern end ‘of the Sierra Nevada range. Orange Grove. Many beautiful groves of oranges and lemons grow in these warm valleys, along the foot of the ranges. The region west of the Sierra Nevada and Cascade ranges is known as the Pacific slope.