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They can be obtained for 10 ¢ each from office of US Geological Survey , Washington , DC . On these maps , a paper reconnaissance can be made in the office , probable grades and alinement can be studied , and a very good general idea ...
Special provisions are made for obtaining the right to divert water for working claims . ... be obtained for 1 or 5 years at $ 10 per annum , with right of renewal upon payment of fee and performance of work to value of $ 200 per annum ...
The correct sampling of a lot of ore is the process of obtaining from it a smaller quantity which contains unchanged ... has been obtained at a reasonable speed and cost , and is of the bulk , dryness and fineness required for the ...
Apa yang dikatakan orang - Tulis resensi
LibraryThing ReviewUlasan Pengguna - wackyvorlon - LibraryThing
I only have the second volume of this work, and I love it! Found at a local Value Village, it is filled with fascinating information. Details of all aspects of mine engineering, including compressed air, ventilation, and supporting structures. Baca ulasan lengkap
Conditions Methods in General
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