Before assaying, original samples must be cut down, often in several stages. Each cut involves, in effect, the sampling of a sample, the final portion
Table of ContentsElectric Furnace Production of Pig SteelMaking Pig Iron by Electric FurnaceRegulation of CarbonPig Iron ImpuritiesLoss of Iron in the SlagAdaptability of the Process to Continuous
Table of ContentsNorthern CanadaArizona In the preceding pages some unit costs of sinking, drifting, cross-cutting, and drilling have been presented, together with a few costs
Drilling is employed extensively, either as the principal exploratory method or to supplement exploration by underground and surface workings. Three principal types of drills are
Prospecting for lode deposits begins with a search for mineralized outcrops, the key to the existence of which may often be found in mineralized float
Table of ContentsPlacer MiningGeneral Geology of Placer-Gold DepositsCharacteristics of Placer Gold Prospecting for placer gold, except perhaps in the case of buried placers, is the
Table of ContentsDrill SamplingAccuracy Of Churn-Drill SamplesSampling With Core DrillsSampling with Hammer DrillsFace SamplingGrab SamplingCutting Down SamplesSummary Of Sampling A brief summary of the methods employed
Table of ContentsMining DefinitionsProspecting & ExplorationProspectingEquipmentMining LawsPlacer DepositsLode DepositsReporting On ProspectsExplorationExploratory WorkingsExploration By DrillingCost of ExplorationExploration Drill Sampling Techniques This report summarizes mining practices of a
Table of ContentsMeans of Effecting AgitationAnalysis of the Pachuca Tank and Its OperationsDefects of the SystemThe Parral-Tank System of Slime-AgitationExtraction of ValuesConclusion Of the treatment
Table of ContentsBeryllium AlloysOutline Beryllium Assay MethodsFusion-Pellet-Spark MethodSustaining Alternating-Current Arc MethodEquipmentStandardsExperimentalBorates in GlassProceduresFusion-Pellet-Spark MethodSample and Standards PreparationExcitation, Exposure, and Development ConditionsPhotometrySustaining Alternating-Current Arc MethodSample & Standards PreparationSample Excitation,
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