542 LIFE AS RELATED TO PHYSICAL CONDITIONS 



Pyrenees, the Caucasus, and the Himalaya Mountains each 

 contain tribes which were driven from the lower plains, 

 but have been able in these retreats to withstand invaders 

 who were too powerful for them in their former homes. 



Old-fashioned customs still maintain their hold in remote 

 mountain regions long after they have been discarded in 

 the surrounding country where intercommunication is 

 easier. In some of the Scotch Highlands the natives still 



CRIPPLE CREEK 

 One of the largest mining camps in the world. 



cling to their ancient dress, and in sections of the southern 

 Appalachian Mountains many of the customs of the early 

 pioneers are still common. 



In mountain regions rich in ores, mining naturally be- 

 comes the chief industry, and here, if there were any secluded 

 native inhabitants, these have been replaced by the energetic 

 miners from distant places. The deep and remote valleys 

 and mountain sides have become the homes of mining 

 camps and cities. Railroads have been built to these, 

 overcoming almost impassable obstructions, and ore crush- 



