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Displaying results 843921 - 843930 of 866613

Drilling analyses

Archival Collection

Blue Diamond Mine Corporate Records

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Plaster mill and plaster packing, schematic diagram, undated

Archival Collection

Blue Diamond Mine Corporate Records

Archival Component

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"Quick-as-a-wink" solenoid operated air valves schematic, 1948

Archival Collection

Blue Diamond Mine Corporate Records

Archival Component

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Rotary drill test holes, 1950-1972 and undated

Archival Collection

Blue Diamond Mine Corporate Records

Archival Component

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Annual tons crush to mill, 1992-1996

Archival Collection

Blue Diamond Mine Corporate Records

Archival Component

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Core drilling analyses, 1977-1978

Archival Collection

Blue Diamond Mine Corporate Records

Archival Component

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Daily drill logs, 1951 June

Archival Collection

Blue Diamond Mine Corporate Records

Archival Component

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Drill logs, 1951-1979 and undated

Archival Collection

Blue Diamond Mine Corporate Records

Archival Component

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Ore reserves, 1967

Archival Collection

Blue Diamond Mine Corporate Records

Archival Component

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1972 year-end waste summary, 1972

Archival Collection

Blue Diamond Mine Corporate Records

Archival Component

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