17. 119 Subsequent days at the AEggischhorn; Afloat on the Icebergs; Bedding and Structure; Ancient Moraines of the Aletsch; Scratched Rocks; passage of the mountains to the end of the glacier; a wild gorge; arrival at Zermatt; the Riffelberg 18.--First Ascent of Monte Rosa. 122 The ascent new to myself and my guide; directions; Ulrich Lauener; Ominous Clouds; passage of the Goerner Glacier; Roches Moutonnees; Avalanche from the Twins; gradual advance of clouds; bridged chasms; Scene from a cliff; apparent atmospheric struggle; Sound of the snow; Dangerous Edge; Overhanging Cornice; staff driven through it; increased obscurity; Rocky Crest; loss of pocket-book; Summit attained; Boiling Point; fall of snow; exquisite forms of the Snow Crystals; a shower of frozen blossoms; the descent; mode of attachment; Startling Avalanche; Blue Light emitted from the fissures of the fresh snow; Stifling Heat; return to the Riffel 19. 133 The Rothe Kumm; pleasant companions; difficult descent; temperatures of rock, air, and grass; Singular Cavern in the ice; Structure and Stratification 20.--The Goerner Grat and the Riffelhorn; Magnetic Phenomena. 137 Formation and Dissipation of clouds; Scene from the Goerner Grat; Magnetism of the Rocks; the Compass and Sun at variance; ascent of the Riffelhorn; Magnetic effects; places of most intense action; Scratched and Polished Rocks; Exfoliation of crust produced by the sliding of ancient glaciers; Magnetic Polarity; Consequent Points; Bearings from the Riffelhorn; action on a Distant Needle 21. 145 Fog on the Riffelberg; its dissipation; Sunset from the Goerner Grat; Cloud-wreaths on the Matterhorn; Streamers of Flame; grand Interference Phenomenon; investigation of Structure; the Goernerhorn glacier; Western glacier of Monte Rosa; the Schwarze, Trifti, and Theodule glaciers; welding of the Tributaries to parallel Strips; Temptation 22.--Second Ascent of Monte Rosa (1858). 151 A Light Scrip; my Guide lent; a substitute; a party on the mountain; across the glacier and up the rocks; the guide expostulates; among the crevasses; the guide halts; left alone; beauty of the mountain; splendid effects of Diffraction; Cheer from the summit; on the Kamm; climbers meet; among the rocks; Alone on the Summit; the Axe slips; the prospect; the descent; serious accident; a word on climbing alone 23. 160