The round screened screw-on tip of a sink spout. It mixes water and air for a smooth flow.

A composite of aerial photographs depicting a portion of the earths surface.

An aerial photograph or photomosaic to which is added basic mapping information such as place names, boundaries, etc.

A photograph taken from a vehicle in flight.

An overhead electric cable (fieldassembled at a construction site) which is attached to poles or other supporting structures.

A device which introduces air into an exiting stream of water.

1. Exposing a substance to circulating air. 2. In landscape architecture, the addition of air into the soil; may be