TABLE OF CONTENTS. 
VII 
Pags. 
Courses that may be adopted by the general government to lessen 
LOCUST INJURY — Continued. 
the permanent region and the proportion of burnable land, 275 — Number 
of square miles in the Permanent region, 276 — The plains area east of the 
mountains, 276 — Its vegetation, 276 — Burnable land practically inden- 
tical with grazing-land, 277 — The plains area in the British possessions, 
278 — In the United States, 279 — The mountain area, 280 — Timber-lands in 
the mountain area dependent upon latitude and altitude, 280 — Northern 
section of the mountain area, 280, 281 — River valleys in Montana, 281 — 
Valley of the Yellowstone and its tributaries, 281 — Of the Madison River, 
282 — Of the Jefferson and Missouri Rivers, 281? — The Wind River and the 
Bighorn Mountains, 283 — The Green River Basin, 283 — Valley of the Snake 
River and its tributaries, 286, 289 — Southern section of the mountain area, 
289— In Southern Wyoming, 290,291— In Colorado, 291— The San Luis 
Valley, 292 — Mountain area in New Mexico, 292 — The plateau area, 293 — 
Its extent, 293— The Roan Plateau, 293— The Uinta Valley, 293— The Grand 
River Valley, 294— The Great Sage Plain, 294— The San Juan River Valley, 
295 — The Colorado River Plateau, 295— The Great Basin area and the 
Wasatch Mountains, 296 — Valleys of the Bear River and its tributaries, 
296 — The Wasatch Range and its valleys, 298 — Mountain ranges in Ne- 
vada, 299, 300 — The Mojave Desert, 300 — Preventive measures in the plains 
region, 300 — Calaptenus spretus breeds, especially in British America and 
Montana, 300 — Fertile grass-land in the Territories, 300 — Its extent, 302 — 
Encouragement to settlement, 302 — Modification of climate by settlement 
and cultivation, 302 — Professor Thomas's communication to Governor 
Pillsbury, 303 — The settlement of Dakota will benefit Minnesota, 304 — 
Forest planting on the coteau of the prairies, 305 — Preserving of lakes, 
ponds, and swamps in Minnesota, 306 — Encouragements to railroads, 307 — 
Irrigation, 307 — Extent of the arid region, 307, 308 — Only a small portion of 
the land irrigable, 308 — Agriculture in the arid West and in the Missis- 
sippi Delta require assistance of the national government, 308 — Preven- 
tion of floods by means of reservoirs, 309 — Cost of irrigation, 310 — Influ- 
( ence of irrigation on the locust question, 310 — Mr. H. Gannett's report 
on irrigation in the arid region, 310 — Waste of water in irrigating, 311 — 
Amount of irrigable laud, 311 — Amount of water necessary for irrigation, 
312,313 — Irrigable land in Colorado, Utah, California, &c, 313 — Arable 
land in the Territories, 314 — Amount of land in actual cultivation, 314 — 
Irrigation by means of artesian wells, 315 — Methods of irrigation, 
315, 316 — Uselessness of reservoirs and great irrigating cauals in the arid 
region, 316 — How irrigation should be regulated, 316 — Preservation of 
forests; tree-planting, 317 — Judicious burning in spring, 317 — Permanent 
establishment of locust signals and warnings, 318 — Co-operation with the 
Dominion Government, 319 — Preventive measures iu the mountain and 
plateau areas, 319 — Breeding-grounds of the locust in the mountain area, 
319 — Influence of settlement, 320 — Replanting of forests, 320 — Importance 
of locust signals to the farmer in Colorado and Utah, 321 — Very destruct- 
ive locust invasions not likely to recur in the future, 321 — The locust has 
ceased to be an object of dread, 322. 
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