our's run.

The plant is simple to work, and as no steam boiler is required the
danger of explosions is removed. No expensive chimney is necessary for
the waterless power plant.

Where petroleum oil can be cheaply obtained, say for twopence per
gallon, one of the Otto Cycle Oil Engines, for powers up to 20 indicated
horse-power, can be advantageously employed.

These engines have the advantage of being a self-contained power,
requiring neither chimney nor steam boiler, and may be said to be a
waterless power. The objection is the necessity to rely upon oil as
fuel, and the dangers attending the storage of oil. A good oil engine
should not require to use more than a pint of refined petroleum per
indicated horse-power working for one hour.

Fortunately for the mining industry electricity, that magic and
mysterious agency, has come to its assistance, in permitting motive
power to be transmitted over distances of even as much as 100 miles with
comparatively little loss of the original power energy.

Given, that on a coal or lignite field, or at a waterfall, 100
horse-power is developed by the combustion of fuel or by the fall of
water driving a turbine, this power can be electrically transmitted to a
mine or GROUP OF MINES, say 100 miles away, with only a loss of some 30
horse-power. For twenty miles the loss on transmission should not exceed
15 horse-power so that 70 and 85 horse-power respectively are available
at the mines. No other system offers such remarkable efficiencies of
power transmission. The new Multiphase Alternating Electric Generating
and Power Transmission System is indeed so perfect as to leave
practically no margin for improvement.

The multiphase electric motor can be directly applied to the stamp
battery and ore-breaker driving-shaft and to the shaft of the
amalgamating pans.

APPROXIMATE POWER REQUIRED TO DRIVE THE MACHINERY OF A MINE.

Rock breaker 10 effective horse-power
Amalgamating pan 5 effective horse-power
Grinding pan 6 effective horse-power
Single stamp of 750 lb. dropping
90 times per minute 1.25 effective horse-power
Settlers 4 effective horse-power
Ordinary hoisting lift 20 effective horse-power

Allow 10 per cent in addition for overcoming friction.

Besides this electrical distr