Robert Koch's eerste tekeningen en fotomicrografieen van bacterien (1876-1877) zijn wetenschappelijke uitrusting, zijn vrienden en raadgevers.

Abstract

SUMMARY: Robert Koch's first drawings and Photomicrographs of bacteria, his scientific equipment his friends and advisers. In 1867 - 1877, even before the oil immersion came into use, Robert Koch laid down the bases of his later bacteriological work. The present paper particularly emphasizes the optical power of the microscopes used at the time by Koch, - which was the photo micrographic apparatus he used to make his astounding photos of bacteria, what was his photographical technique and what improvements he brought to these. Koch knew the extraordinary happiness of being sustained by many scientific friends and advisers, who gave him their complete aid. For four of them Ferdinand Colin, Julius Cohnheim, Gustav Fritsch, und Carl Janisch, short biographical items are given, as also regarding the little known microscope builder Ernst Gundlach, whose objectives were used by Koch to make his splendid photomicrographs of bacteria.