One of several constant-pressure levels in the atmosphere for which a complete evaluation of data derived from upper air observations is required.

A value that describes the ability of a material to conduct heat. The number of Btu that flow through 1 square foot of material, in one hour. It is the reciprocal of the R-Value (U-Value = 1/R-Value).

Latin for 'let the buyer beware'. This implies a buyer must ensure that goods about to be.

The marrying of two or more portions of one shipment that originate at different locations, moving under one bill of lading, from one shipper to one consignee. Authority for this service must be granted by tariff publication. See Bill of Lading.

The intensity of the internally distributed forces or components of forces that resist a change in the volume or shape of a material that is or has been subjected to external forces. Stress is expressed in force per unit area and is calculated on the basi ...

Downward scattered and reflected solar radiation, coming from the whole hemisphere with the exception of the solid angle of the sun's disc on a surface perpendicular to the axis of this cone.

Same as precipitation- effectiveness index.

The change in barometric pressure within a specified period of time (typically 3 hours for meteorological observations).

Too heavy aloft.

A transportation line that hauls export or import traffic between ports and inland points.

The losses that result from inherent resistance in electrical conductors and transformation inefficiencies in distribution transformers in a transmission and distribution network.

The U.S. federal body charged with enforcing acts of the U.S. Congress that affect common carriers in interstate commerce. STB replaced the Interstate Commerce Commission (ICC) in 1997.

A type of recording siphon barometer. The mechanically magnified motion of a float resting on the lower mercury surface is used to record atmospheric pressure on a rotating drum.

meter-An instrument for measuring the transmissivity of the atmosphere; a type of transmissometer. It consists of a constant- intensity collimated light source located at a suitable distance from a photoelectric cell. Variation in the turbidity of the atm ...

A process employed in the shipment of citrus fruits and other perishable commodities. The fruit is packed and placed in a cold room from which the heat is gradually extracted. The boxes of fruit are packed in containers that have been thoroughly cooled an ...

Same as ombrometer.

An extra charge sometimes added to steamship freight rates; justified by higher fuel costs. (Also known as Fuel Adjustment Factor or FAF.)

(1) The action of a line as it passes over the sheave of a block. (2) The act of easing away gently.

The interior space of a building that is heated or cooled.

Insulation made from rockwool fibers, fiberglass, cellulose fiber, vermiculite or perlite minerals, and composed of loose fibers or granules can be applied by pouring directly from the bag or with a blower.