Abstract
A RECENT article by Prof. Alois Herzog (Zeiss Nach., 2, Hefte 5 and 6, 1938) is based upon the value of the microscope to the chemist for qualitative analytical determinations with minimal amounts of material. A number of simple methods is described involving the use of sublimation, distillation, precipitation, drying, crystallization, spot reactions, and other procedures with or without the addition of specified reagents, whereby crystals and other deposits having characteristic microscopical appearances are obtained, which serve to identify various metals and metallic and other salts, etc. Screens (sieves), animal and vegetable fibres, and miscellaneous inorganic substances like asbestos, and the use of the polarizing microscope are also briefly described. The article is illustrated with 97 excellent photomicrographs of the appearances obtained in the reactions, and full details are given as to how the objects were photographed, namely the camera, objective and ocular used, the illumination and the time of exposure.
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Microscopy for the Chemist. Nature 142, 1154 (1938). https://doi.org/10.1038/1421154d0
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DOI: https://doi.org/10.1038/1421154d0