A coating process, similar to gas carburizing and carbonitriding, whereby a reactant atmosphere gas is fed into a processing chamber where it decomposes at the surface of the workpiece, liberating one material for either absorption by, or accumulation on ...

See 'Government National Mortgage.

To untie.

A rope spliced into the end of a block and used for making it fast to rigging or spars. Such a block is called a tail-block.

An instrument for recording global solar radiation.

A line led to a sail, but is not currently in use. The line currently in use is known as the working sheet. Usually the working and lazy sheets change when the boat is tacked.

That part of snow melt that reaches stream channels as runoff.

A flower-like diagram indicating the relative frequencies of different wind directions for a given station and period of time.

A pressure-plate anemometer consisting of a plate which is free to swing about a horizontal axis in its own plane above its center of gravity. The angular deflection of the plate is a function of the wind speed. This instrument is not used for station mea ...

The process by which a negotiable instrument such as a Bill of exchange, Promissory Note or Cheque is transferred in good faith and for value. Negotiation only occurs when the transferring party receives value. In international trade this is normally an e ...

Plating wherein fine metal powders are peened onto the work by tumbling or other means.

(1) An organic compound in which atoms form more than one coordinate bond with metals in solution. (2) A substance used in metal finishing to control or eliminate certain metallic ions present in undesirable quantities.

The air compressor continues to run, usually at full RPM, but no air is delivered because the inlet is either closed off or modified, not allowing inlet air to be trapped.

The degree to which all the forces on a boat are symmetrical so the vessel sails with just a slight weather helm.

The depth of water that would result from the melting of snow or ice, assuming measurement on a horizontal surface and no infiltration or evaporation.

High-Pressure

A law of chemistry and physics: the rate of diffusion of one substance in another is proportional to the negative gradient of the concentration of the first substance.

A projecting aperture at the end of a tube, pipe etc. serving as an outlet for compressed air. Reduces the demand on the compressor by generating the highest thrust and volume for the lowest possible air consumption.

A machine employing two or more stages.

Is used in psychrometry and is the temperature recorded by a thermometer whose bulb has been covered with a wetted wick and whirled on a sling psychrometer. Taken with the dry bulb, it permits determination of relative humidity of the atmosphere.