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The Fifth International Congress for Electron Microscopy was convened in Philadelphia on Aug. 29, 1962. This was the 31st anniversary of the construction of the first working electron microscope by M. Knolls and E. Ruska and the 20th anniversary of the founding of the Electron Microscope Society of America. The large number of participants and papers attested to the logarithmic growth of interest in the electron microscope. Over 600 papers were presented on both biological and industrial topics, which have been published in book form. (Electron Microscopy, Volumes I and II, Academic Press). The papers on biology were arranged in sessions with such titles as: biological techniques, virus fine structure, virus reproduction, tumor viruses, experimental pathology, ultrastructure of microorganisms, plant cells, cell surfaces and functions, cytoplasmic organelles, intracellular membrane systems, motility mechanisms, extracellular matrices, nucleic acid and proteins and the nephron. In a report of such a large meeting one
Marvin A. Lutzner (1963) studied this question.