This essay focuses on the meaning that the term “experimental” acquires within spiritualism during the second half of the nineteenth century. It builds upon Paul Janet’s notions of “experience” and “experimentation” in psychology, by stressing the role of physiology and pathology in his reflection. Regardless of the role the concept of “experimentalism” took on in Victor Cousin’s psychology, which arguably indicated more an “internal affection” than actual experimentation, in Janet’s spiritualism the term regains its original meaning of empirical verification. Janet (...) highlights the importance of madness to the development of a new psychological paradigm that could reconcile philosophy and medicine, reason and experience, by taking up pathology as a form of natural and indirect experimentation. (shrink)

ArgumentWhen Pasteur and Chamberland hastily set up their small biological industry to meet the agricultural demand for the anthrax vaccine, their methods for preparation and production had not yet been stabilized. The process of learning how to standardize biological products was accelerated in 1882 when vaccination accidents required the revision of production norms as the first hypotheses on fixity, inalterability, and transportability of vaccines were invalidated and replaced by procedures for continuous monitoring of the calibration of vaccines and the renewal (...) of vaccine strains. Initially, the incompleteness and ongoing development of production standards justified Pasteur's monopoly on the production of the anthrax vaccine under his immediate supervision. Later on, the Pasteur Institute maintained control of these standards in the framework of a commercial monopoly that it established on the veterinary vaccines first sent and then cultivated abroad by the Société de Vulgarisation du Vaccin Charbonneux Pasteur, founded in 1886. (shrink)