Preface; Part I: 1. Introductory; 2. Expedition of 1856: the Oberland; 3. The Tyrol; 4. Expedition of 1857: the Lake of Geneva; 5. Chamouni and the Montanvert; 6. The Mer de Glace; 7. Measurements commenced; 8. Alone upon the glacier; 9. The Jardin; 10. Lightning and rain; 11. First ascent of Mont Blanc, 1857; 12. Life at the Montanvert; 13. Expedition of 1858; 14. Passage of the Strahleck; 15. Ancient glaciers in the valley of Hasli; 16. Ascent of the Finsteraarhorn; 17. Subsequent days at the Aeggischhorn; 18. First ascent of Monte Rosa; 19. The Rothe Kumm; 20. The Goerner Grat and the Riffelhorn; 21. Fog on the Riffelberg; 22. Second ascent of Monte Rosa, 1858; 23. The Furgge glacier; 24. Need of observations on Alpine temperature; 25. Second ascent of Mont Blanc, 1858; 26. Hostility of chief guide; 27. Winter expedition to the Mer de Glace, 1859; Part II: 1. Light and heat; 2. Radiant heat; 3. Qualities of heat; 4. Origin of glaciers; 5. Whiteness of snow; 6. Colour of water and ice; 7. Colours of the sky; 8. The moraines; 9. Glacier motion; 10. Motion of the Mer de Glace; 11. Ice wall at the Tacui; 12. Winter motion of the Mer de Glace; 13. Cause of glacier motion - De Saussure's theory; 14. Rendu's theory; 15. Anticipations of Rendu confirmed by Agassiz and Forbes; 16. Forbes's theory; 17. The crevasses; 18. Further considerations on viscosity; 19. Heat and work; 20. Papers presented to the Royal Society by Professor Forbes in 1846; 21. Thomson's theory; 22. Pressure theory; 23. Regelation; 24. Crystallization and internal liquefaction; 25. The moulins; 26. Dirt-bands of the Mer de Glace; 27. Veined structure of glaciers; 28. The veined structure and differential motion; 29. The ripple theory of the veined structure; 30. The veined structure and pressure; 31. The veined structure and the liquefaction of ice by pressure; 32. White ice-seams of the Glacier Du Geant; 33. Glacier Du Geant in a state of longitudinal compression; Summary; Appendix; Index.