This paper is concerned with the uses of history in science. It focuses in particular on Anglo-American genetics and on university textbooks—where the canon of a science is consolidated, as the heterogeneous approaches and controversies of its practice are rendered unified for its reproduction. Tracing the emergence and eventual standardization of geneticists’ use of a case-based method of teaching in the 1920s–1950s, this paper argues that geneticists created historical environments in their textbooks—spaces in which students developed an understanding of the (...) laws of genetics through simulations of their discovery and use. Witnessing the unfolding of Mendel’s and Morgan’s experiments and performing genetic crosses on paper, students learned not only the rules that were explicitly taught as such, but also the experientially-based, tacit skills needed to find and follow these rules. This didactic system taught them how to go on when confronting new situations, and in doing so, provided geneticists with an important disciplinary tool, freeing the first steps of their student’s enculturation from the physical infrastructure of the laboratory. (shrink)

Science entails history writing: scientists are continuously engaged in creating “imagined pasts” for their own specialisms, both on the small scale of the ubiquitous literature review and on a much broader scale. This aspect of science has been considered in very different ways in decades-old, yet largely neglected, contributions by Thomas S. Kuhn, Augustine Brannigan, and Simon Schaffer. Inspired by these pieces and by the missing dialogue between them, this essay argues that their concealment is itself an instance, on the (...) broadest possible scale, of the power of “imagined pasts”—in this case the imagined continuity, inscribed in the very name of our discipline, between Isaac Newton and ourselves. (shrink)