289. Cross section of the Blue Grotto, on the island of Capri 258 290. Character profiles of coast elevation and subsidence 259 291. Map showing the distribution of existing glaciers and the two important wind poles of the earth 263 292. An Alaskan glacier spreading out at the foot of the range which nourishes it 264 293. Surface of a glacier whose upper layers spread with but slight restraint from retaining walls 265 294. Section through a mountain glacier 267 295. Profile across the largest of the Icelandic ice caps 267 296. Ideal section across a continental glacier 267 297. View of the Eyriks Jökull, an ice cap of Iceland 268 298. The zones of the lower atmosphere as revealed by recent kite and balloon exploration 269 299. Map of Greenland, showing the area of inland ice and the routes of explorers 271 300. Profile in natural proportions across the southern end of the continental glacier of Greenland 272 301. Map of a glacier tongue with dimple above 273 302. Edge of the Greenland inland ice, showing the nunataks diminishing in size toward the interior 274 303. Moat surrounding a nunatak in Victoria Land 274 304. A glacier pavement of Permo-Carboniferous age in South Africa 276 305. Diagrams to illustrate the manner of formation of scape colks 277 306. Marginal moraine now forming at the edge of the continental glacier of Greenland 279 307. Small lake between the ice front and a moraine which it has recently built 279 308. View of a drained lake bottom between the ice front and an abandoned moraine 280 309. Diagrams to show the manner of formation and the structure of an outwash plain and fosse 280 310. Map of the ice masses of Victoria Land, Antarctica 282 311. Sections across the inland ice and the shelf ice of Antarctica 283 312. Diagram to show the nature of the fixed glacial anticyclone above continental glaciers 284 313. Snow deltas about the margins of a glacier tongue in Greenland 285 314. View of the sea ice of the Arctic region 286