How does an expert transmit expertise? What genres of scientific writing are available for doing so? Does the choice of genre matter in the long run? In this essay, I approach these questions by comparing two monographs published in the mid 1940s in the field of microbiology. While the works shared a concern with life at its smallest, they were written in different genres. One, entitled L’évolution physiologique: étude des pertes de fonctions chez les microorganismes, was a general survey of research on microbial nutrition.1 The other, called Pure Cultures of Algae: Their Preparation and Maintenance, was a manual of techniques for cultivating microscopic algae in test tubes.2
When I told my colleagues in Germany and the United States where I was heading for archival research two years ago, people looked at me completely baffled, or even in compassion. Some also laughed. Historians of science, they seemed to imply, travel to Ivy League universities for archival research, to Oxbridge, Paris, or Berlin. What could there be of interest in the library of an agricultural school in corn country?