9 Infrared Analytical Accessories-Namely, Crystals, Transmission Windows in the Nature of Optical Elements, Cells and Holders for Sampling Gas and Liquid, Powder Funnels and Pellet Holders, Gas Chromatograph Fraction Collectors, Beam Condensers, Pyrolyzers, Pyrolyzer Chambers, Attentuated Total Reflectance Analyzers, Beam Attenuators and Recorder Pen Holder Assemblies for Spectrophotometers