white-metal capping

A winding rope capping formed by opening out the wires of the rope for a
length equal to that of the socket, cleaning them thoroughly of all
grease, cutting out the hemp core, and finally drawing them into the
warmed socket and running in the white metal, which is an alloy of lead,
antimony, and tin. Mason

white mica

See:muscovite

white mineral press

A machine for briquetting flue dust. Fay

white mundic

See:arsenopyrite

white nickel

See:rammelsbergite; nickel-skutterudite.

white nickel ore

See:chloanthite

white olivine

The mineral forsterite, Mg₂ SiO₄ . Fay

white opal

Precious opal of any light color, as distinguished from black opal; e.g.,
a pale blue-white gem variety of opal.

white ore

See:cerussite

white powder

See:white gunpowder

white pyrite

See:marcasite; arsenopyrite.

white salt

a. Salt dried and calcined; decrepitated salt. Fay
b. Salt refined and prepared mainly for household use. Also, vacuum pan
salt used for salting skins; distinguished from rock salt.
Kaufmann

white sand

Sand that is usually quartzitic and pure enough to resist heat and slags;
used for the final layer in Siemen's steel furnaces. Nelson

white schorl

See:albite

white smoker

A plume of hydrothermal fluid issuing from the crest of an oceanic ridge;
e.g., the East Pacific Rise at the mouth of the Gulf of California. The
fluid is clouded by white precipitates, mostly barite and silica. It
issues at rates of tens of cm/second and at temperatures of 100 to 350
degrees C (Macdonald et al., 1980). CF:black smoker

white tellurium

See:sylvanite; krennerite.

white tin

Metallic tin after smelting, in contradistinction to black tin or
cassiterite. Fay

white tombac

A variety of brass made white by the addition of arsenic.
Standard, 2

white vitriol

The mineral goslarite, ZnSO₄ .7H₂ O . Also called: salt of
vitrol; zinc vitrol. CTD; Fay

whiting substitute

A finely ground calcium carbonate, about 98% pure, contaminated by
magnesia, silica, iron, or alumina. This material should not be confused
with chalk whiting or precipitated chalk. USBM, 7

Whiting system

A system in which two parallel, grooved sheaves are coupled. These sheaves
are driven directly from a hoisting engine. One sheave is set at a slight
angle to the vertical so that the rope will pass freely from one sheave to
the other. The hoisting rope passes around the drive sheaves and then to a
takeup sheave, which is mounted on a horizontally movable carriage to take
up slack or to change the hoist from one level to another. A tail rope is
used in this system, although it may not be absolutely necessary.
Lewis