Abstract: An adjustable nozzle dispenser and a multi-nozzle dispenser are disclosed for washing an aerofoil of a gas turbine engine. The dispensers are characterised by their nozzle arrangements being capable of washing at least two different parts of the aerofoil. A system and a method of operating such a nozzle dispenser is included.

Abstract: A computer controlled microscope is provided with improved usability, which allows a user to quickly build, modify and reuse complex sample illumination and/or observation processes by introducing a recordings hierarchy in which a recording can be both a parent recording of one or more child recordings and a child recording to a single parent recording. A recordings hierarchy allows control parameter data to be inherited from a parent recording to a child recording. The group of child recordings linked to a parent recording is called a recordings collection. Viewed together, recordings and recordings collections form a tree-like hierarchy. Single load and store functions associated with a recording permit the entire recording and child recordings hierarchy to be stored on a storage device and reloaded into the computer of a computer controlled microscope.