Investigating or analyzing materials by the use of thermal means (G01N3/00 - G01N23/00 take precedence)

investigating strength properties of solid materials by application of mechanical stress analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid analysing materials by measuring the pressure or volume of a gas or vapour investigatingdensity or specific gravity of materials; analysing materials by determining density or specific gravity investigating flow properties of materials, e.g. viscosity, plasticity; analysing materials by determining flow properties investigating surface or boundary effects, e.g. wetting power; investigating diffusion effects; analysing materials by determining surface, boundary, or diffusion effects investigating characteristics of particles; investigatingpermeability, pore-volume, or surface-area of porous materials investigating resistance of materials to the weather, to corrosion, or to light investigatingmaterials by mechanical methods investigating or analysing materials by the use of optical means, i.e. using infra-red, visible, or ultra-violet light investigating or analysing materials by the use of microwaves investigating or analysing materials by the use of other wave or particle radiation, e.g. X-rays or neutrons