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

Earth Features and Their Meaning — Part 23

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

Earth Features and Their Meaning — Part 23

405. Character profiles sculptured by mountain glaciers 379

Earth Features and Their Meaning — Part 23

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

424. Effects of differential melting and subsequent refreezing upon a glacier surface 396

425. Dirt cone with its casing in part removed 396

426. Schematic diagram to show the manner of formation of glacier cornices 397

427. Superglacial stream upon the Great Aletsch Glacier 398

428. Ideal form of the surface left on the site of a piedmont glacier apron 399

429. Map of the site of the earlier piedmont glacier of the Upper Rhine 399

430. Diagram and map to bring out the characteristics of newland lakes 402

431. View of the Warner Lakes, Oregon 402

432. Schematic diagram to illustrate the characteristics of basin-range lakes 403

433. Schematic diagram of rift-valley lakes and the valley of the Jordan 403