[Principles of collecting the material for morphological and morphometric studies in pathology]

Methods of random sampling of preparations for investigation of pathological processes of diffuse and focal character are described; a possible classification of pathologoanatomic material is suggested. It is recommended to consider the total volume of an organ as a combination of submultitudes of elementary volumes non-intersected in pairs; these volumes should be selected according to the table of random numbers. For this purpose, the organ is dissected in parallel blocks of a given thickness perpendiculary to its root and on the last block a lattice is placed with numbered squares giving numeration for submultitudes of elementary volumes.