A sensitive instrument used in water transparency and light absorption
measurements at sea. The instrument, which contains its own light source,
can measure fine graduations of transparency of an individual water mass.
Hunt
An instrument for detecting moisture, esp. in the air. Standard, 2
Essentially, a shallow tank, usually cylindrical, which is kept agitated
by hydraulic water and/or stirring devices. Pulp fed to the tank is
separately discharged as a free-settling fraction containing the coarser
and heavier particles and an overflowing fraction containing the finer,
lighter material. Pryor, 3
The waters of the Earth, as distinguished from the rocks (lithosphere),
living things (biosphere), and the air (atmosphere). Includes the waters
of the ocean; rivers, lakes, and other bodies of surface water in liquid
form on the continents; snow, ice, and glaciers; and liquid water, ice,
and water vapor in both the unsaturated and saturated zones below the land
surface. Included by some, but excluded by others, is water in the
atmosphere, which includes water vapor, clouds, and all forms of
precipitation while still in the atmosphere. AGI
A contrivance or apparatus to prevent the explosion of steam boilers.
Webster 2nd
Relating to the pressure or equilibrium of fluids.
A balance for weighing a substance in water to ascertain its specific
gravity. Webster 3rd
The height of a vertical column of water whose weight, if of unit cross
section, is equal to the hydrostatic pressure at a given point; static
head as applied to water. See also:static head
Used in large water mains, in which sheet lead is forced tightly into the
bell of a pipe by means of the hydrostatic pressure of a liquid.
Strock, 1
A large ram, the surface of which is acted on by liquid in contact with a
small ram. See also:hydraulic jack
a. Stress that is uniform in all directions, e.g., beneath a homogeneous
fluid, and causes dilation rather than distortion in isotropic materials.
AGI
b. The pressure exerted by the water at any given point in a body of water
at rest. The hydrostatic pressure of ground water is generally due to the
weight of water at higher levels in the zone of saturation. AGI
A section of roller conveyor having rolls suitably weighted with liquid to
control the velocity of the moving objects. See also:roller conveyor
A branch of physics that deals with the characteristics of fluids at rest
and esp. with the pressure in a fluid or exerted by a fluid on an immersed
body. CF:hydrodynamics
A state of stress in which the normal stresses acting on any plane are
equal and where shearing stresses do not exist in the material.
AGI
On a boiler, the closing of all openings and pumping water into the boiler
at a pressure (such as 50%) greater than the normal operating pressure.
The purpose is to locate leaks or prove that there are no leaks.
Strock, 2
See:hydrogen sulfide
The mineral group desautelsite, hydrotalcite, pryoaurite, reevesite,
stichtite, and takovite.
An electrically operated apparatus showing at a distance the exact level
of water, as in a reservoir; an electric high- and low-water indicator.
Standard, 2
A coal washer of the classifier type whose agitator or rotator consists of
hollow arms radiating from a central distributing manifold or center head.
There may be four or more of these radiating arms, each with one or more
downwardly inclined nozzles. When water is discharged from these nozzles,
the impulse has the effect of rotating the agitator in a manner similar to
a lawn sprinkler. This agitator is suspended in a cylindrical tank and
water is pumped through it under pressure, thereby creating a controlled
upward current uniform over the entire area of the tank. Mitchell
Of or pertaining to hot water, to the action of hot water, or to the
products of this action, such as a mineral deposit precipitated from a hot
aqueous solution, with or without demonstrable association with igneous
processes; also, said of the solution itself. Hydrothermal is generally
used for any hot water but has been restricted by some to water of
magmatic origin. AGI