Nowhere are the deficiencies of contemporary philosophy of science as evident as in its treatment of experimentation, which is viewed as an automatic, unambiguous process. Sections 15–18 of Heidegger's Being and Time provide some important tools for handling this issue, but are inadequate because they erroneously regard scientific entities as appearing in experimentation as thematized, present-at-hand objects. The possibility of a non-Galilean science is raised, however, by viewing experimentation as a kind of performance.