Accounts, [169].
Administration, [161], [169], [178].
Administrative reports, [178].
Air-compression, [146].
-drills, [147].
Alteration, secondary, [24], [25], [26], [30].
Alternative shafts to inclined deposit, [63].
Amortization of capital and interest, [42].
Animals for underground transport, [134].
Annual demand for base metals, [38].