We have seen that working in the lab and doing eldwork are two activities closely related to one another throughout the history of science and that conceptions of lab and eld are co-produced. is can be highlighted by juxtaposing them as ideal types, the lab ideal dealing with controlled as opposed to uncontrolled places, where methods of intervention rather than those of observation are used and where knowledge production happens in closed rather than open spaces. As the ideal types are complementary to one another, a closer look at the experimental practices in the laboratory will help to also reveal the characteristics of the eld as a site for scienti c experimentation.