Mining and Metallurgy, Volumes 25-30

Front Cover
American Institute of Mining and Metallurgical Engineers., 1909 - Mineral industries
 

What people are saying - Write a review

We haven't found any reviews in the usual places.

Other editions - View all

Common terms and phrases

Popular passages

Page 473 - We are of opinion, further, that the constitutional power of the State to insist that its natural advantages shall remain unimpaired by its citizens is not dependent upon any nice estimate of the extent of present use or speculation as to future needs.
Page 371 - Again, as soon as the end appears in sight prices will rise and production diminish, and that progressively. This interference with the law of decreasing increase, produced by growing scarcity, will, of course, prolong the life of our coal-reserves, but at the same time will greatly hamper our industries dependent on this fuel.
Page 53 - The paramount use should be that of water supply; next should follow navigation in humid regions and irrigation in arid regions. The development of power on the navigable and source streams should be kept subordinate to the primary and secondary uses of the waters; though other things equal, the development of power should be encouraged, not only to reduce the drain on other resources, but because properly designed reservoirs and power plants retard the run-off and so aid in the control of the streams...
Page 370 - ... periods. The result obtained by this method is that the easily accessible and available coal will be exhausted about the year 2027, and all coal by the middle of that century.
Page 55 - We recognize the waters as a primary resource, and we regard their use for domestic and municipal supply, irrigation, navigation, and power, as interrelated public uses, and properly subject to public control. We therefore favor the complete and concurrent development of the streams and their sources for every useful purpose to which they may be put.
Page 471 - In considering the conservation of resources it should be held in mind that : (1) The present generation has the power and the right to use efficiently so much of these resources as it needs. (2) The nation's needs will not be curtailed; these needs will increase with the extent and diversity of its industries, and more rapidly than its population. (3) The men of this generation will not mine, extract, or use these resources in such manner as to entail continuous financial loss to themselves in order...
Page 110 - ... and metallurgical methods and apparatus. From 1871 to 1878 he practiced as a consulting mining engineer, residing in California. In 1878 he was one of the US Commissioners of the Paris International Exposition of that year, and contributed to the report of the Commission an account of the mineral industries represented in that Exposition. From 1879 until his death he resided (except as to his summer home at Stockbridge, Mass., and his occasional journeys on professional business) in New York...
Page 394 - These particles are even coated, touched, or spotted with a crystalline white film, with some foreign substance that looks like silica under the glass, and this is what makes it necessary to polish it in the grinding pan before it will amalgamate freely.
Page 367 - The first mining of coal in a commercial way in the United States was in what is known as the Richmond Basin, a small area in the eastern part of Virginia. Small quantities of coal had been mined here in the latter part of the eighteenth century and it was also in the latter part of the eighteenth and the beginning of the nineteenth centuries that efforts were being made to introduce anthracite coal for fuel purposes.
Page 1 - ... the American Society of Civil Engineers, the American Institute of Mining Engineers, The American Society of Mechanical Engineers, and the American Institute of Electrical Engineers — for notable scientific or industrial achievement...

Bibliographic information