April, 1874.
[CONTENTS.]
| Cloud-banner of the Aiguille du Dru | [Frontispiece] | |
| PAGE | ||
| § 1, | 2. Clouds, Rains, and Rivers | [1], [6] |
| 3. | The Waves of Light | [8] |
| 4. | The Waves of Heat which produce the Vapour of our Atmosphere and melt our Glaciers | [11] |
| 5. | Experiments to prove the foregoing statements | [14] |
| 6. | Oceanic Distillation | [19] |
| 7. | Tropical Rains | [23] |
| 8. | Mountain Condensers | [27] |
| 9. | Architecture of Snow | [29] |
| 10. | Atomic Poles | [32] |
| 11. | Architecture of Lake Ice | [35] |
| 12. | The Source of the Arveiron. Ice Pinnacles, Towers, and Chasms of the Glacier des Bois. Passage to the Montanvert | [38] |
| 13. | The Mer de Glace and its Sources. Our First Climb to the Cleft Station | [43] |
| 14. | Ice-cascade and Snows of the Col du Géant | [46] |
| 15. | Questioning the Glaciers | [48] |
| 16. | Branches and Medial Moraines of the Mer de Glace from the Cleft Station | [51] |
| 17. | The Talèfre and the Jardin. Work among the Crevasses | [52] |
| 18. | First Questions regarding Glacier Motion. Drifting of Bodies buried in a Crevasse | [54] |
| 19. | The Motion of Glaciers. Measurements by Hugi and Agassiz. Drifting of Huts on the Ice | [69] |
| 20. | Precise Measurements of Agassiz and Forbes. Motion of a Glacier proved to resemble the Motion of a River | [60] |
| 21. | The Theodolite and its Use. Our own Measurements | [62] |
| 22. | Motion of the Mer de Glace | [66] |
| 23. | Unequal Motion of the two Sides of the Mer de Glace | [70] |
| 24. | Suggestion of a new Likeness of Glacier Motion to River Motion. Conjecture tested | [72] |
| 25. | New Law of Glacier Motion | [76] |
| 26. | Motion of Axis of Mer de Glace | [78] |
| 27. | Motion of Tributary Glaciers | [79] |
| 28. | Motion of Top and Bottom of Glacier | [80] |
| 29. | Lateral Compression of a Glacier | [81] |
| 30. | Longitudinal Compression of a Glacier | [84] |
| 31. | Sliding and Flowing. Hard Ice and Soft Ice | [86] |
| 32. | Winter on the Mer de Glace | [88] |
| 33. | Winter Motion of the Mer de Glace | [93] |
| 34. | Motion of the Grindelwald and Aletsch Glacier | [93] |
| 35. | Motion of Morteratsch Glacier | [95] |
| 36. | Birth of a Crevasse: Reflections | [98] |
| 37. | Icicles | [99] |
| 38. | The Bergschrund | [102] |
| 39. | Transverse Crevasses | [103] |
| 40. | Marginal Crevasses | [105] |
| 41. | Longitudinal Crevasses | [109] |
| 42. | Crevasses in relation to Curvature of Glacier | [110] |
| 43. | Moraine-ridges, Glacier Tables, and Sand-Cones | [112] |
| 44. | The Glacier Mills or Moulins | [116] |
| 45. | The Changes of Volume of Water by Heat and Cold | [118] |
| 46. | Consequences flowing from the foregoing Properties of Water. Correction of Errors | [122] |
| 47. | The Molecular Mechanism of Water-Congelation | [125] |
| 48. | The Dirt Bands of the Mer de Glace | [127] |
| 49. | Sea-ice and Icebergs | [132] |
| 50. | The Æggischhorn, the Märgelin See and its Icebergs | [136] |
| 51. | The Bel Alp | [139] |
| 52. | The Riffelberg and Görner Glacier | [140] |
| 53. | Ancient Glaciers of Switzerland | [145] |
| 54. | Erratic Blocks | [147] |
| 55. | Ancient Glaciers of England, Ireland, Scotland, and Wales | [150] |
| 56. | The Glacier Epoch | [152] |
| 57. | Glacial Theories | [155] |
| 58. | Dilatation and Sliding Theories | [155] |
| 59. | Plastic Theory | [156] |
| 60. | Viscous Theory | [161] |
| 61. | Regelation Theory | [163] |
| 62. | Cause of Regelation | [167] |
| 63. | Faraday's View of Regelation | [171] |
| 64. | The Blue Veins of Glaciers | [176] |
| 65. | Relation of Structure to Pressure | [183] |
| 66. | Slate Cleavage and Glacier Lamination | [187] |
| 67. | Conclusion | [191] |
CLOUD-BANNER OF THE AIGUILLE DU DRU (par. [84] and [227]).