MOUNTAINS; MINING; FORESTRY 215 



8. In what sort of places are most of the gold and silver mines 

 located? 



9. Explain the fact that the gold earliest found in California was 

 in the sands of old river beds. 



10. Why is there a short season for growth of plants on high 

 mountains? 



11. Name some kind of injury that can be done by each of the 

 forest enemies named in 234. 



