Coniaurum Stoping Methods
File consists of an essay titled Coniaurum Stoping Methods. Contains original diagrams
MacDonald, John A.
Square-Set Mining Methode
File consists of an essay titled Square-Set Mining Methode. Contains original blueprints and diagrams
Pigott, J.A.
Rate of Mining
File consists of an essay titled Rate of Mining. Contains original diagrams
Campbell, G.A.
Jeffrey Asbestos Mine
File consists of an essay titled Jeffrey Asbestos Mine. Contains original diagrams
Filteau, Paul
Gypsum Mining at Caledonia
File consists of an essay titled Gypsum Mining at Caledonia. Contains original photographs and diagrams
Smuck, H.