ing ore in course of breaking.
Ventilation.
Vertical deposits, entry.
interval between levels.
shafts.
capacity.
Volume, specific, of ores.

Waste-filled stope.
Water-power.
Weight per cubic foot of ore.
Weindel, Caspar.
Whiting hoist.
Width of ore for one sample.
Winding appliances.
Winzes.
in shrinkage-stoping.
to be used for filling.
Working cost.
inherent limitations in accuracy of.
sheets.
Workshops.

Yield, previous.
Years of life required to yield --% interest.

Zinc deposits.
leaching.

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