When kidney transplantation evolved from an experimental into a clinical treatment of end-stage renal disease (ESRD) in the 1960s, it was conceptualised as a collaborative therapy. Before specific immunosuppressants were introduced in the 1980s, the best chances for patient and graft survival were expected from finding ‘good’ matches between donor and recipient tissues. Therefore, the pioneers of clinical transplantation in Europe started to recombine their growing patient pools. They created trans-border organ exchange organisations such as Eurotransplant and Intertransplant, based on shared patient databases.

The article traces international and transnational co-operation in kidney exchange using the example of state-socialist Germany. How did the German Democratic Republic (GDR) get involved with the interconnected networks of knowledge, data, and organ exchange in ESRD treatment? In what ways did the domestic system of kidney transplantation depend on intra- and trans-bloc exchange? How did the GDR profit, and what did it have to offer on an international scale, both in the First and the Second World? The article sheds light on the under-explored transplantation history of the socialist East and thereby investigates the possibilities and limits of trans-bloc collaboration in Cold War Europe.

In the late 1930s, children in three Malawian villages were subjected to a peculiar test for vitamin A deficiency devised by Dr. Benjamin Platt, director of the Nyasaland Nutrition Survey and a leading colonial nutrition scientist. Platt constructed a makeshift adaptometer, appropriate for field conditions, that could be placed over a subject’s head to measure retinal adaptation to light. He built this contraption from simple materials, including a five-pound tea-box and sticking plaster. This article takes the curious commingling of commodity objects and scientific materials (where a discarded tea-box finds new life as an experimental technology) as an entry point for examining how scientific practices are woven from semiotic and material threads, demonstrating how heterogeneous social and material elements overlap and influence one another. The article first analyses how Platt’s tea-box adaptometer – and the discourses and ambitions framing the Survey – imagined a new kind of nutrition research hinged to the space of the field rather than the laboratory. It then proceeds to consider how the tea-box, an incipient manifestation of ‘appropriate technology’, points us towards the more tacit ways that tea wove itself into the fabric of the Survey and colonial society, as a gustatory discourse steeped in racial anxieties. Attending to the ‘stuff’ of scientific work cued me to broader imperial circuits and interests that shaped colonial nutrition research.