ArgumentSmallpox inoculation was introduced in Europe in the early eighteenth century and has been considered the first mass treatment of disease based on practical use of probability calculations and mathematical tools of computation. The article argues that these new approaches were deeply entangled with other rationalities, most emphatically that of exemplarity. Changes in inoculation methods around mid-century gradually changed the conceptualization of disease, seeing all cases as fundamentally equal, and thus making it more relevant to count them. Arithmetic changed the (...) ways of thinking about smallpox epidemics, but new ways of conceptualizing disease were vital to making it a matter of arithmetic at all. The article investigates what happened when numbers and figures were introduced into medical matters: Who did the figures really concern, and what types of argument were they fitted into? How were numbers transformed into metaphors, and how did quantitative argument work together with arguments from exemplarity? (shrink)

_The power and materiality of form. On studying the forms of knowledge in catechisms and ship’s logs._ The article argues that in the emerging field of the history of knowledge, with its focus on the production, circulation and exchange of knowledge, explorations of _ forms _ will represent a valuable addition. Form is related to genre. Yet, while the identification of genres is largely based on linguistic, literary or rhetorical criteria, form is also about structures and materiality as well as (...) about practical and institutional preconditions. Form often attracts less attention than contents, although the form makes this content recognizable _ as _ knowledge. Our argument builds on the exploration of two different early modern knowledge forms, the catechism and the ship's log respectively. Both demonstrate how form is decisive in defining contents as authoritative knowledge. They also illustrate how form is a prerequisite to enable knowledge to circulate and be part of cultural exchange, and thus to be socially efficient. The forms serve to codify existing knowledge, but also to the production and circulation of new insights. When forms like the log and the catechism are examined historically, however, they can also be seen to live their own lives in a tension between stability and change. The forms themselves become objects of negotiations, change and innovation. (shrink)