9
Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; automatic vending machines and mechanisms for coin-operated apparatus; cash registers, calculating machines, data processing equipment and computers; fire-extinguishing apparatus.
photometers, nephelometers, [ refractometers, recorders, ratio recorders, differential turbidimeters, colorimeters, monochromatic light sources producing light of a single wave length, ] dust detectors for indicating mass concentration of particulate matter in the atmosphere, color standards for grading honey, maple syrup, and other liquids by color comparison, [ colorimetric absorption cells for use in monitoring color concentrations in effluents, thermometers, ] and light scattering cells for use in determining physical properties such as molecular weights