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Abstract
For measurement and statistical investigation of such properties as the parameters, surface and shape of the projection of fine particles and pores respectively in the section of a solid, automatic instrument is required which can be further developed. On proposal of the author design work for such an instrument limited to measurements of the length and width of sediment particles has been carried out for several years at the Royal Institute of Technology, Division of Electrical measurements. The system of an electronic investigator including a television tube for analysing and a computing machine is recommended. Provided that it will be possible to apply the instrument to a great many fields the development and completion thereof should interest not only researchers but various industries as well.