Schistes verts chloriteux, serpentineux et talqueux, avec des masses stéatiteuses. XIX. Calcschistes (comme ci-dessus) formant un banc de plus de 100 mètres.(271) XX. Schistes verts chloriteux. XXI. Calcschistes (comme ci-dessus). XXII. Il suit ci-dessous une série fort puissante de schistes verts serpentineux, chloriteux, talqueux et stéatiteux alternant encore avec des calcschistes. En plusieurs localités les schistes deviennent très amphiboliques à petits cristaux noirs. Cette puissante formation calcaréo-serpentineuse repose inférieurement sur des micaschistes et des gneiss anciens. [Illustration: GEOLOGICAL SECTION OF THE MATTERHORN. (MONT CERVIN) BY SIGNOR F. GIORDANO.] *H.* PROFESSOR TYNDALL AND THE MATTERHORN. In the second edition of Tyndall’s _Hours of Exercise in the Alps_ the Professor made some additional remarks upon his defeat in 1862, and to these remarks I replied in No. 35 of the _Alpine Journal_. I do not feel that the additional information afforded in these publications possesses the least interest to the majority of my readers, and therefore I do not reprint it; and I refer to it only for the sake of those who may be desirous to pursue the subject. [Illustration: “The things which tumble about the ears of unwary travellers”] LONDON: PRINTED BY WILLIAM CLOWES AND SONS, STAMFORD STREET AND CHARING CROSS. THE MATTERHORN AND ITS GLACIERS [Map: The Matterhorn and its glaciers] THE VALLEY OF ZERMATT [Map: The Valley of Zermatt; and the Central Pennine Alps] FOOTNOTES 1 In the lower diagram the tins are shown as they appear when packed for travelling. I generally carry them at the top of a knapsack, outside. 2 I extract from No. 63 of the _Alpine Journal_ the following note by Gustav de Veh, a retired Russian officer, upon the prevention of snow-blindness. “We were on the march home along the mountain plains, when, dazzled by the intense sun-rays reflected by the endless snow-fields we were marching along, my eyelids lost all power to open; I felt my elbow touched, and, looking through my fingers, I beheld one of our friendly highlanders preparing a kind of black paste by mixing gunpowder with snow. The General told me to let him do what he wanted. The Circassian applied the black stuff under my eyes, on my cheeks, and to the sides of my nose. To my astonishment I could then open my eyes, and felt no more difficulty to see plainly and clearly everything. I have tried that experiment many times since, and it never failed to relieve me, although I used common Indian-ink and black water-colour, instead of the above-mentioned paste.”