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قراءة كتاب The Business of Mining A brief non-technical exposition of the principles involved in the profitable operation of mines

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The Business of Mining
A brief non-technical exposition of the principles involved in the profitable operation of mines

The Business of Mining A brief non-technical exposition of the principles involved in the profitable operation of mines

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دار النشر: Project Gutenberg
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class="center">UNITED STATES GOLD PRODUCTION
(In Value)

  1910 1911
Alabama $32,900 $18,335
Alaska 16,271,800 16,002,976
Arizona 3,413,200 2,954,790
California 20,441,400 20,310,987
Colorado 20,526,500 19,153,860
Georgia 24,000 30,532
Idaho 1,035,000 1,169,261
Illinois   5,788
Michigan   20
Maryland   20
Montana 3,720,400 3,169,840
Nevada 18,783,700 18,968,578
New Mexico 477,200 639,897
N.Carolina 64,500 76,693
Oklahama   30,698
Oregon 18,783,700 18,968,578
Pennsylvania 18,783,700 18,968,578
S.Carolina 37,800 13,437
S.Dakota 5,380,200 7,430,367
Tennessee 2,800 14,140
Texas 400 1,178
Utah 4,312,700 4,709,747
Virginia 900 4,300
Washington 806,000 504,537
Wyoming 4,100 18,791
Porto Rico 1,000 2,191
Philippines 154,400 130,501
Miscellaneous   265,013
  __________ __________
Total $96,269,100 $96,233,528

 

GOLD PRODUCTION OF THE WORLD

  1910 1911
Transvaal $155,730,260 $170,487,900
United States including Alaska 96,269,100 96,233,528
Australia 65,634,340 61,072,409
Russia 43,168,389 40,600,000
Mexico 24,073,100 19,500,000
Rhodesia 12,607,791 13,045,100
India 12,089,400 10,505,506
Canada 10,224,910 10,646,000
China 10,102,300 10,000,000
Japan, East Indies, etc. 10,522,437 10,600,000
West Africa 3,674,087 5,268,100
Madagascar 2,149,721 1,900,000
France 1,114,700 1,275,000
Central and South America 14,886,234 15,000,000
Other countries 7,118,841 7,250,000
  __________ __________
Total $469,365,610 $473,383,543

 

V
THE FINDING OF MINES.

Mines are discovered in many ways. One hears much about prospecting, and since this is a practice which is rapidly changing from a mystical to a scientific basis, a few considerations will here be in order.

Persons who have lived in mining communities are familiar with two types of prospector, the roving and the settled. Somehow, when we think of the former, there comes to mind a bearded, roughly clad man, usually accompanied by a "jack" and both packing the outfit consisting of a few tools, a pan, some blankets, a gun, and a supply of "grub." If we have in mind the other type of prospector, we imagine him as living an isolated life in a log cabin up in the hills, spending his daytime in putting in a few, short drill-holes and blasting down a ton or two of usually worthless rock in a "tunnel" or shallow shaft, confident that each succeeding shot will disclose a treasure.

Both of these types represent the utmost in optimism. These men endure many hardships and privations, they can have little converse with other humans, often they can see no provisions for the next day; in fact, they receive few of the benefits of modern civilization—if we except the food-preserving features. Still, a typical, old-style prospector keeps on with absolute faith that fortune will smile tomorrow. We must reach the conclusion that these uneducated men are led on by subtle beliefs which, to a technically-trained man, seem like the rankest folly. They are diviners, dreamers. They are disappearing now and, a generation hence, there will be but memories of them. They are giving way to successors of a different type.

The newer kind of prospector is well educated, and, perchance, he is rather youthful. His chances of success are many times those of the man he supplants. Why? Because he is taking advantage of the work that has been done by all former prospectors. He is guided by theories deduced from

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