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Milling Formula Interactive Calculator: Solve for any subject variable in bold by entering values in the boxes on the left side of the equation and clicking the "Calculate" button. The solution will appear in the box on the right side of the equation. To enter a value, click .

Biaxial Positive. A mineral is biaxial positive if β is closer to α than to γ.; In this case the acute angle, 2V, between the optic axes is bisected by the γ refractive index direction. Thus we say that γ is the acute bisectrix (BX A), because it bisects this angle.; If a table of optical properties of minerals reports the 2V angle, it usually refers to this acute angle.

[PDF]Jul 21, 2015 · How to Calculate an Oil and Gas Royalty Interest for a Lease Well. Calculating an oil and gas royalty interest can become quite complicated for some wells, for a number of reasons. Understanding the fundamental formula and reasoning behind...

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- Abstract - USGS
MINERAL EVALUATIONS. By Thomas W. Camm Mining engineer, Western Field Operations Center, U.S. Bureau of Mines, Spokane, WA. ABSTRACT. In this U.S. Bureau of Mines report, mine and mill cost models are presented to make quick estimates of the cost to develop mineral deposits in the desert region of the Southwest United States.

- Mineral Formulae Recalculation - SERC