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 séracs 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 386 413. Map of the Rotmoos Glacier, a radiating glacier of Switzerland 386 414. Outline map of the Asulkan Glacier in the Selkirks, a horseshoe glacier 387 415. Outline map of the Illecillewaet Glacier of the Selkirks, an inherited-basin glacier 388 416. Diagram to illustrate the surface flow of glaciers 390 417. Diagram to show the transformation of crevasses into séracs 391 418. View of the _Glacier des Bossons_, showing the position of accidents to Alpinists 392 419. Lines of flow upon the surface of the _Hintereisferner_ Glacier in the Alps 393 420. Lateral and medial moraines of the _Mer de Glace_ and its tributaries 393 421. Ideal cross section of a mountain glacier 394 422. Diagrams to illustrate the melting effects upon glacier ice of rock fragments of different sizes 394 423. Small glacier table upon the Great Aletsch Glacier 395