ILLUSTRATIONS 



Figure Page 



1. Routes of early exploration in Montana 22 



2. Pliysiographie map of Montana 26 



3. Profile Idaho-]\Iontana topography on the parallel 



48 degrees 30 minutes 30' 



4. Profile Idaho-Montana topography on the 46th parallel 32 



5. Profiles of certain mountain ranges in Montana 36 



6. Chart of ^Montana showing direction of prevailing winds 40 



7. Diagrams showing monthly distribution of precipita- 



tion in iMontana 44 



8. Mean temperature diagrams for the year. Distrib- 



uted stations 48 



9. Mean temperature diagrams for the year at two stations 



near the same meridian, but 200 miles apart 54 



10. Chart showing temperature, relative humidity and . 



precipitation at Missoula, 1911 56 



11. Isotherms for mean temperatures in ^Montana, 1911.... 60 



12. Forest sectional areas 78 



13. Badlands near Glendive, Montana 98 



14. Vegetation of the rimrock near Roundup, Mont 104 



15. Alluvial bench along the ^Musselshell, near Melstone, 



Montana 108 



16. Populus jS'arc/eiffn along the Musselshell 112 



17. Yucca glauca near Forsyth, Montana 116 



18. Buffalo berry along the Milk River 120 



19. Vegetation on south slope near Havre, Montana.-— 122 



20. Creeping Juniper on plains near Havre 124 



21. Junipers near Boulder, Montana 126 



22. A western slope near Missoula, Montana - 128 



23. A high landscape on the East Fork of the Bitter Root.... 130 



24. A southern slope in the Lolo Valley — . 132 



25. Opposing slopes on the East Fork of the Bitter Root 134 



26. Cercocarpus ledifiolius on south-facing bluff 136 



