1. Zermatt Glacier 2 2. Formation of veined structure 3 3, 4. Formation of marginal fissures and veins 4 5. Fissures and seracs 4 6. Section across glacial valley, showing old lateral moraines 5 7. Mont Blanc glacier region 10 8. Svartisen Glacier 13 9. Floating berg 18 10. Iceberg in the Antarctic Ocean 20 11. Map of southeastern Alaska 22 12. Map of Glacier Bay, Alaska 25 13. Front of Muir Glacier 26 14. Map of glaciers in the St. Elias Alps 31 15. Map of Greenland 33 16. Diagram showing the character of glacial motion 43 17. Line of most rapid glacial motion 45 18. Diagram showing retardation of the bottom of a glacier 46 19. Bed-rock scored with glacial marks 52 20. Scratched stone from the till of Boston 54 21. Typical section of till in Seattle, Wash. 55 22. Ideal section showing how the till overlies the stratified rocks 56 23. Vessel Rock, a glacial boulder 56 24. Map of Rhône Glacier 58 25. Conglomerate boulder found in Boone County, Ky. 63 26. Mohegan Rock 72 27. Drumlins in Goffstown, N. H. 73 28. Map of drumlins in the vicinity of Boston 75 29. Section of kame 77 30. Map of kames in Andover, Mass. 78 31. Longitudinal kames near Hingham, Mass. 79 32. Map showing the kames of Maine and southeastern New Hampshire 81 33. Western face of the Kettle Moraine near Eagle, Wis. 99 34. Section of the east-and-west glacial furrows on Kelly's Island 103 35. Same as the preceding 105 36. Section of till near Germantown, Ohio 108 37. Moraines of Grape Creek, Col. 123 38. Map of North America in the Ice period 127 39. Quartzite boulder on Mont Lachat 128 40.