(under the class definition) Processes or materials wherein water or another liquid is deposited on the unknown material in the vapor state to facilitate the optical study of the unknown.
(1) Note. Generally the material in a gas sample is expanded to obtain a supersaturated condition relative to the gas and participated by use of water vapor.
(2) Note. Materials examined include ionized particles and molecular species.
SEE OR SEARCH CLASS
73, Measuring and Testing,
28.01+, for the determination of the amount of solid matter in the analysis of gases generally, subclasses 29.01+ for moisture content of gases, and subclasses 863+ for reciprocating and rotary samplers involving gases and liquids.
356, Optics: Measuring and Testing,
37, for particle detection by condensation nuclei, subclasses 335+, for the determining of the size of particles by optical methods, subclasses 337+, for particle light scattering generally including the determination of concentration or number of particles by statistical methods, subclasses 437+ for transmission tests through gases for the determination of the concentration of particles present in the gases generally and visual inspection equipment.
