This project aims to provide an epistemological analysis of the practice of chemistry in different contexts in the second half of the 18th century and of the interaction between actors working in these different contexts. The project will specifically focus on the performance and interpretation of chemical experiments in different contexts in the Dutch Republic, which provides a microcosm allowing us to study broader developments taking place in Europe. The contexts that will be treated are universities, learned societies, and practical chemistry. For each contexts, the work of a central figure will be analyzed: Joh. D. Hahn (1729-84) for the university, Martinus van Marum (1750-1837) for learned societies, and P. J. Kasteleyn (1746-94) for practical chemistry. The overall aim of the analysis will be to assess the epistemic role of experiments in the work of these actors. With what epistemic aim were experiments performed? What were the actors hoping to learn? How were experiments interpreted? What specific steps were taken to draw conclusions from experiments? To analyze the interaction between these different contexts, I will follow the trajectory of a series of specific experiments as they are reperformed an reinterpreted in different contexts. The project will contribute to our understanding of the nature and role of experiments in this crucial episode in the history of science. As such, it will also contribute to ongoing work in the philosophy of experimentation.