An instrument to measure and record the wave spectra. Hy
The time interval between the appearance of two consecutive wave
repetitions at a given point, usually expressed in seconds. The wave
segments considered must be the same; i.e., the crests, troughs, etc.
Hy
Radiation, such as from an antenna of r-f energy into space or of sound
energy into a conducting medium. Hy
a. The process by which a water wave, moving in shallow water as it
approaches the shore at an angle, tends to be turned from its original
direction. The part of the wave advancing in shallower water moves more
slowly than the part still advancing in deeper water, causing the wave
crests to bend toward parallel alignment with the shoreline. AGI
b. The bending of wave crests by currents. AGI
A concept used to describe the distribution of energy among waves of
different period. Wave speed increases with wave length, so distant storms
may be detected by the increase of energy in long period waves. Sea is
fully developed when all possible wave frequencies possess energies
appropriate to the spectrum for the prevailing wind speed. Hy
A quantity that specifies the speed with which a wave travels through a
medium. Hy
A vein that alternately enlarges or pinches at short intervals.
Fay
a. A solid, noncrystalline hydrocarbon of mineral origin, such as
ozocerite and paraffin; composed of the fatty acid esters of the higher
hydrocarbons.
b. Soft or puddled clay used for dams or stoppings in a mine.
An early name for yellow opal with a waxy luster. Fay
Crude ozokerite associated with earthy matter. Tomkeieff
A wall of clay built around the gob or goaf to prevent the entry of air or
egress of gas. CTD
The building of clay lumps as a lining to the pack to reduce leakage. If
about 15% to 20% of calcium chloride is added to the clay, it will remain
plastic. Sinclair, 1
The rails, sleepers, etc., upon which cars, tubs, or corves run.
Fay
a. Eng. A thin layer or band that separates or defines the boundaries of
thicker strata; e.g., thick beds of limestone separated by wayboards of
slaty shale, sandstone separated by wayboards of clay. Also spelled
weighboard. Fay
b. Leic. Beds of green marl among sandy shales in the Trias.
Arkell
The tailrace of a mill. Fay
A trigonal mineral, (B,Ca)Al3 (PO4 ,SiO4 )2
(OH)6 ; crandallite group; white; in Uganda.
See:winze
Roof and walls of underground excavations that are in danger of collapse
unless suitably supported. Pryor, 3
A strip of metal applied to any particular device to take the wear of
moving parts or objects. In conveyor work, it refers to the strip that is
sometimes applied to the chain conveyor troughs and on which the drag
chain rides. Jones, 1
Sections of hardened steel plates of various thicknesses (as desired)
which are welded (or bolted) in areas of severe wear, such as the insides
of feeders, crushers, transfer chutes, or any other area where mined
material passes, creating abrasion, and threatens wearing of these areas.