An apparatus for homogeneous micro‐grinding of spectrochemical and other samples1. For spectrochemical analysis of solid substances, mixtures which must fulfil definite criteria are required. The degree of the needed purity, completeness and homogeneity is described.2. To obtain homogeneous material, the substance must be finely ground within a short time. The grinding problem was solved by developing an apparatus which includes a modefied mortar and pestle. Special points of construction which guarantee the specifications of grinding are given for both operation and efficiency.3. The construction of the apparatus which is now manufactured is elucidated. The method of the applied test of qualifications is outline
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