| CHAPTER 1. |
| Valuation of Copper, Gold, Lead, Silver, Tin, and Zinc Lode Mines |
| Determination of average metal content; sampling, assay plans, calculations of averages, percentage of errors in estimate from sampling. |
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| CHAPTER II. |
| Mine Valuation (Continued) |
| Calculation of quantities of ore, and classification of ore in sight. |
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| CHAPTER III. |
| Mine Valuation (Continued) |
| Prospective value. Extension in depth; origin and structural character of the deposit; secondary enrichment; development in neighboring mines; depth of exhaustion. |
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| CHAPTER IV. |
| Mine Valuation (Continued) |
| Recoverable percentage of the gross assay value; price of metals; cost of production. |
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| CHAPTER V. |
| Mine Valuation (Continued) |
| Redemption or amortization of capital and interest. |
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| CHAPTER VI. |
| Mine Valuation (Continued) |
| Valuation of mines with little or no ore in sight; valuations on second-hand data; general conduct of examinations; reports. |
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| CHAPTER VII. |
| Development of Mines |
| Entry to the mine; tunnels; vertical, inclined, and combined shafts; location and number of shafts. |
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| CHAPTER VIII. |
| Development of Mines (Continued) |
| Shape and size of shafts; speed of sinking; tunnels. |
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| CHAPTER IX. |
| Development of Mines (Continued) |
| Subsidiary development: stations; crosscuts; levels; interval between levels; protection of levels; winzes and rises. Development in the prospecting stage; drilling. |
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| CHAPTER X. |
| Stoping |
| Methods of ore-breaking; underhand stopes; overhand stopes; combined stope. Valuing ore in course of breaking. |
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| CHAPTER XI. |
| Methods of Supporting Excavation |
| Timbering; filling with waste; filling with broken ore; pillars of ore; artificial pillars; caving system. |
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| CHAPTER XII. |
| Mechanical Equipment |
| Conditions bearing on mine equipment; winding appliances; haulage equipment in shafts; lateral underground transport; transport in stopes. |
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| CHAPTER XIII. |
| Mechanical Equipment (Continued) |
| Drainage: controlling factors; volume and head of water; flexibility; reliability; power conditions; mechanical efficiency; capital outlay. Systems of drainage,—steam pumps, compressed-air pumps, electrical pumps, rod-driven pumps, bailing; comparative value of various systems. |
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| CHAPTER XIV. |
| Mechanical Equipment (Concluded) |
| Machine drilling: power transmission; compressed air vs. electricity; air drills; machine vs. hand drilling. Workshops. Improvement in equipment. |
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| CHAPTER XV. |
| Ratio of Output to the Mine |
| Determination of possible maximum; limiting factors; cost of equipment; life of the mine; mechanical inefficiency of patchwork plant; overproduction of base metal; security of investment. |
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| CHAPTER XVI. |
| Administration |
| Labor efficiency; skill; intelligence; application coÖrdination; contract work; labor unions; real basis of wages. |
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| CHAPTER XVII. |
| Administration (Continued) |
| Accounts and technical data and reports; working costs; division of expenditure; inherent limitations in accuracy of working costs; working cost sheets. General technical data; labor, supplies, power, surveys, sampling, and assaying. |
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| CHAPTER XVIII. |
| Administration (Concluded) |
| Administrative reports. |
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| CHAPTER XIX. |
| The Amount of Risk in Mining Investments |
| Risk in valuation of mines; in mines as compared with other commercial enterprises. |
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| CHAPTER XX. |
| The Character, Training, and Obligations of the Mining Engineering Profession |
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| Index |
