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By Stefanie GängerHosted at Basel’s beautiful Pharmacy Museum, the conference “Variable Matters” was designed to bring together historians with an interest in the movement of medicinals and knowledge about them between and across societies in the world of the ‘long’ eighteenth century. Participants talked about very different kinds of substances – vanilla, calomel, bezoars – and studied them in rather diverse contexts – anything from the Swiss Alps to the Bolivian Andes – but everyone was reflecting, in one way or another, on the subjects of medicine trade, therapeutic exchange, and epistemic brokerage.Several speakers engaged with one or another aspect of the communication of medical knowledge about foreign or unfamiliar ‘simples’ to other cultural imaginaries, medical localities, and therapeutic traditions. Quite a few papers dealt with the acquisition, transfer and codification of remedies associated with the ‘exotic’. Emma Spary, in a public keynote lecture, discussed the introduction of vanilla to France. Vanilla, originally from the Spanish Viceroyalty of New Spain, was becoming familiar in France from the late 1600s, and the talk focused on the various issues – of translation, transport, and taste – involved in moving the plant and knowledge about it across vast expanses of space. In another paper, we heard about the growing consumption of tea in the seventeenth-and eighteenth-century Low Countries from Marieke Hendriksen, who was just starting a new project on the role of subjective experience and taste in the acquisition and communication of knowledge about ‘new’, exotic materia medica. Hjalmar Fors’ talk, in turn, discussed the constraints that Europeans operated under in their encounter with ‘exotic’ plants more broadly – what they deemed worth knowing, or valuable about them, on account of those constraints – and on the botanical and (al-)chemical practices that would reduce them to a semblance of – European – order.[caption id="attachment_15494" align="aligncenter" width="2016"] The delegates of the conference[/caption]Other papers discussed the acquisition, transfer and codification of remedies associated with the ancient, or artisanal. Francesco Luzzini spoke of the Italian physician and naturalist Antonio Vallisneri’s interest in ‘popular’ therapeutics, including his inquiries into the mineral remedies in use among miners, and artisans. Laurence Totelin, in turn, talked about the reception and critique of ancient antidotes like mithridatium and theriac in the eighteenth century, through treatises like William Heberden’s 1745 Antitheriaca. Heberden also figured in other talks, especially in Chris Duffin’s, which explored the contents of eighteenth-century medical chests – including Heberden’s teaching cabinet – that encompassed anything from Mesoamerican cochineal to album graecum.Other papers engaged with the relationship between homegrown, or ‘indigenous’, medicines and novel, unfamiliar substances. Silvia Flubacher, in a paper co-authored with Simona Boscani, talked about the eighteenth-century market in ‘German bezoars’ extracted from Swiss chamois, or goats, a medical commodity that emerged in reaction to overprized exotic bezoars, as part of a discursive revaluation of the ‘local’. Other speakers engaged with ‘their’ substances’ ontological instability, the many acts of adaptation, customizing and calibration a medical substance’s journeys might entail. Irina Podgorny’s talk in particular, focusing on the example of eagle stones – hollow geode stones worn as amulets with a longstanding reputation for protecting pregnant women, or comforting women grieving the loss of a child – discussed not only shifts in the stones’ nomenclature and therapeutic indications as they travelled from Europe to Spanish America; it also studied how the very name – ‘eagle stone’ – was transferred to various objects that were concomitantly attributed analogous properties: to American fossils, and pietists collections of prayers alike.Other speakers focused on the formats used to convey medical knowledge. Clare Griffin presented a paper on the gradual incorporation of American herbal medicines into Russian recipes over the seventeenth and eighteenth centuries, while Matthew J. Eddy delivered a paper on a series of medical consultation letters between the prominent Edinburgh physician William Cullen and a Quaker woman, and the ensuing give-and-take of their negotiations over the proper medicines. Sabrina Minuzzi’s paper, in turn, studied the correspondence and publications – cheap pamphlets, in the majority – of Johannes Behm (c. 1640–1731), or Giovanni Beni, a physician, plant collector and broker who moved knowledge about medicinals and therapeutic practices around, especially between northern and southern Europe, but also with the East Indies, owing to his contacts with merchants, plant traders and botanists alike.[caption id="attachment_15496" align="aligncenter" width="1411"] The Basel Pharmacy Museum.[/caption]In-between papers, we had the privilege of a guided tour of the Pharmacy Museum by the organizer, Barbara Orland, and the museum’s acting director, Philippe Wanner, who did their very best guiding a bunch of excited specialists through the collection (what with everyone chatting excitedly, and constantly getting side-tracked, by charred monkey skulls, preserved seahorses, or actual eagle stones!).