296 —-B. Silliman on the Mining Districts of Arizona. 
Cost of transportation and labor—The important elements of 
cost in mining upon the Colorado river and its adjacent district 
are labor and freight. The former is found to be about the same 
as in Virginia City and Nevada territory generally, viz., from $4 
to $5 per day. So far as present experience justifies an opinion 
——no considerable amount of active mining having been done 
here—there is no dearth of labor. Most of the miners who have 
gone to this country have gone in the capacity of “ prospectors’ 
or adventurers, and are to a great extent owners of claims as 
well as labérers. This is in accordance with the general expe- 
rience of all new mining districts on the Pacific coast. These 
bold and adventurous men have often been the pioneers of dis- 
covery, and subsequently the authors of the laws and regulations 
of the mining districts which their own sagacity and industry 
have developed, and in the organization of which they become 
grains for stock can be raised here for the wants of a consider- 
able population, as well as all the esculent vegetables and most 
