ILLUSTRATIONS IN THE TEXT . xxxiii 



no. PAGE 



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 seracs . . 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 re-freezing 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 



434. Map of the rift-valley lakes of East Central Africa .... 404 



435. Earthquake lakes formed in 1811 in the flood plain of the Lower 



Mississippi . . 404 



436. View of a crater lake in Costa Rica ...... . . . . 405 



437. Diagrams to illustrate the characteristics of crater lakes . . . 406 



438. View of Snag Lake, a coulee lake in California 406 



439. Diagrams to illustrate the characteristics of morainal lakes . . 407 



440. Diagram to show the manner of formation of pit lakes . . . 408 



441. Diagrams to illustrate the characteristics of pit lakes .... 408 



442. Diagram to show the manner of formation of glint lakes . . . 409 



443. Map of a series of glint lakes on the boundary of Sweden and Norway 409 



444. Map of ice-dam lakes near the Norwegian boundary of Sweden . . 410 



445. Wave-cut terrace of a former ice-dam lake in Sweden , -. . 410 



446. View of the Marjelen Lake from the summit of the Eggishorn . . 411 



447. Diagrams to illustrate the arrangement and the characters of rock- 



basin lakes 412 



448. Convict Lake, a valley-moraine lake of California . . . . 413 



449. Lake basins produced by successive slides from the steep walls of a 



glaciated mountain valley . 414 



