30 ECONOMIC GEOLOGY. 
is a matter of special agreement between buyer and seller. I will assume 
that a section of the Dodge or Lisbon mine, 500 feet in length, or one of 
equal value elsewhere, may be obtained for $5,000. The cost of a mill- 
site depends upon the same considerations as that of the mine. Suppose 
the site and improvements, with buildings, to cost $8,000. The necessary 
machinery, such as that used most recently in Lisbon, can be put in by 
responsible parties for $2,500. Add $1,000 for opening the mine and 
various necessary expenses, and the amount of capital required, there- 
fore, for the establishment throughout, would be about £16,500. The 
working expenses may be determined by what has been paid already. In 
1875, the Lisbon company paid $1.50 per ton for mining, and $1 for the 
delivery of the rock at the mill. The Electro company, in 1874, paid for 
mining and culling $2 per ton, $1 for cartage, and $1.50 for milling. In 
1869, I stated that the cost of mining and cartage was about $4 to the 
ton, and the expense of milling about the same, or $8 in all. This was 
estimated in a depreciated currency, and before the art of mining was 
well understood in Lyman. I suppose the first two estimates do not 
include the cost of superintendence. 
Some of the best estimates of the cost of gold mills and of working 
them in California fre given in R. W. Raymond’s report on the Mixeral 
Resources west of the Rocky Mountains for 1872. The cost of a complete 
mill, including engine and boiler, is usually estimated at $1,000 per 
stamp. In a large mill of as many as 20 stamps, this includes the 
concentrating and chlorination works. The same authority presents a 
detailed account of the entire cost of milling, including interest on the 
cost, repayment of cost, and management. In a 30-stamp steam-mill, 
with a crushing capacity of 72 tons a day, this expense is $2.04 per ton, 
not including the cost of concentrating the tailings and chlorinating the 
concentrates. The last item would not be of much account when very 
few sulphurets are found. It would correspond to the expense of working 
the sulphurets, such as was incurred in the Crosby mill in Lyman. I 
understand the entire cost of that mill to have been $18,000, and to be 
capable of working 20.tons of ore per diem. Mr. Crosby estimated the 
entire expense of milling to be $5 per ton, and $2 additional for mining 
and delivery,—making $7 in all. 
Using these figures for a basis, and making allowances for apparatus 
