Fokko Jan Dijksterhuis works at the University of Twente and the Vrije Universiteit Amsterdam in the Netherlands. His background is in cultural history of early modern exact sciences, in particular optics and other knowledge practices of light and color. In the history of knowledge he pursues projects on the dynamics of transfer and the valuation of knowledge.Andreas Weber is an assistant professor in the department of Science, Technology and Policy Studies (STePS) at the University of Twente in the Netherlands. His research focuses on the history of natural history and chemistry in the context of the former Dutch empire in insular Southeast Asia.Huib Zuidervaart worked as a senior researcher at the Huygens Institute for the History of the Netherlands in Amsterdam. His main topic of research is the history of scientific instruments, institutions and collections.