xxxii ILLUSTRATIONS IN THE TEXT 



FIG. 



PAGE 



377. Ideal cross section of the Niagara Gorge to show the marginal terrace 353 



378. View of the bed of the Niagara River above the cataract where water 



has been drained off ..... 353 



379. View of the Falls of St. Anthony in 1851 354 



380. Ideal section to show the nature of the drilling process beneath the 



cataract ........... 355 



381. Plan and section of the gorge, showing how the depth is proportional 



to the width . . . 355 



382. Comparative views of the Canadian Falls in 1827 and 1895 . . 356 



383. Map to show the recession of the Canadian Fall .... 357 



384. Comparison of the present with the future falls .... 358 



385. Bird's-eye view of the captured Canadian Fall at Wintergreen Flats 358 



386. Map of the Whirlpool Basin 360 



387. Map of the cuestas which have played so important a part in fixing 



the boundaries of the lake basins ....... 361 



388. Bird's-eye view of the cuestas south of Lakes Ontario and Erie . . 362 



389. Sketch map of the greater portion of the Niagara Gorge to illustrate 



Niagara history 363 



390. Snowdrift hollowing its bed by nivation ...... 368 



391. Amphitheater formed upon a drift site in northern Lapland . . 369 



392. The marginal crevasse on the highest margin of a glacier . . . 370 



393. Niches and cirques in the Bighorn Mountains of Wyoming . .371 



394. Subordinate cirques in the amphitheater on the west face of the 



Wannehorn 371 



395. "Biscuit cutting" effect of glacial sculpture in the Uinta Mountains 



of Wyoming 372 



396. Diagram to show the cause of the hyperbolic curve of cols . . . 372 



397. A col in the Selkirks 373 



398. Diagrams to illustrate the formation of comb ridges, cols, and horns . 374 



399. The U-shaped Kern Valley in the Sierra Nevadas of California . . 375 



400. Glaciated valley wall, showing the sharp line which separates the 



abraded from the undermined rock surface 375 



401. View of the Vale of Chamonix from the sSracs of the Glacier des 



Bossons ........... 376 



402. Map of an area near the continental divide in Colorado . . . 377 



403. Gorge of the Albula River in the Engadine cut through a rock bar . 378 



404. Idealistic sketch, showing glaciated and nonglaciated side valleys . 378 



405. Character profiles sculptured by mountain glaciers .... 379 



406. Flat dome shaped under the margin of a Norwegian ice cap . . 379 



407. Two views which illustrate successive stages in the shaping of tinds . 380 



408. Schematic diagram to bring out the relationships of the various types 



of mountain glaciers 383 



409. Map of the Malaspina Glacier of Alaska . . . . . .384 



410. Map of the Baltoro Glacier of the Himalayas 385 



411. View of the Triest Glacier, a hanging glacieret . . . . 385 

 412 Map of the Harriman Fjord Glacier of Alaska 386 



