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