Biochemists investigating the problem of the vitamins in the early years of the twentieth century were working without an object, as such. Although they had developed a fairly elaborate idea of the character of the ‘vitamine’ and its role in metabolism, vitamins were not yet biochemical objects, but rather ‘functional ascriptions’ and ‘explanatory devices’. I suggest that an early instance of the changing status of the object of the ‘vitamins’ can be found in their stabilization, through the course of World (...) War I, as bio-political objects for the British and Allied war effort. Vitamins emerged as players, active agents, in Britain’s wartime bio-political problems of food distribution and population health and because of this they became increasingly real as bio-political objects, even prior to their isolation as bio-chemical molecules. I suggest that the materiality of our biology has agency in the development of political regimes and schemes. (shrink)

This article elaborates a local history of zoo feeding practices in order to shed light on the construction of knowledge at the zoo, its intersection with laboratory developments in life sciences, and the nature of zoo sciences. It relies on the case studies of two of the oldest zoological gardens in the world-the Jardin des Plantes Ménagerie in Paris (1793) and the London Zoological Gardens (1828)-both of which formed parts of major scientific institutions, thereby facilitating research on the dialogue between (...) zoo knowledge and life sciences. The article argues that zoos developed around an experimental paradigm that consisted of testing on animals the (nutritional) variables of their survival within a highly constrained institutional framework. From the interwar period, the empirical nature of the zoo feeding economy was marked by slow and uneven changes, associated with the development of nutritional sciences as well as internal hygiene, pathology, and veterinary programmes. Despite transfers and networks of people, methods, experiments, concepts, and animals between zoos and life sciences laboratories, the former remained too impure as a research site to act as an extension of the latter. Zoos, however, needed external laboratories to support themselves with the scientific legitimacy that their “biopolitical modernisation” (Chrulew) required. In addressing programmatic changes as well as their impact upon the animals, this paper argues that trial-and-error experiments are constitutive of the zoo, contributing towards the definition of the nature of both zoo management and zoo sciences. (shrink)

Despite the practical knowledge throughout the nineteenth century that citrus fruit cured scurvy, and that rickets and beriberi were diseases caused by poor diet, it was not until 1901 that animal feeding experiments led one investigator to propose the existence of 'accessory food factors,' a lack of which was determined to be the cause of some illnesses (Hopkins, 1949. In Joseph Needham and E. Baldwin (eds.), Hopkins and Biochemistry, 1861-1947: Papers Concerning Sir Frederick Gowland Hopkins, O.M., P.R.S., with a Selection (...) of His Addresses and a Bibliography of His Publications. Cambridge: W. Heifer and Sons Ltd). The discovery of vitamins has long been considered as a delayed discovery. This delay has been attributed to the power of the germ theory in physiology at the time. While the germ theory and theories of autointoxication certainly played a role in delaying the discovery of vitamins, I argue further that it is important to consider the difference made to physiology by understanding the vitamins’ catalytic function. The profound difference made to physiology by the vitamins’ catalytic function suggests that a vitamin concept had previously been systematically inaccessible to researchers working within the conceptual framework of Bernardian physiology. (shrink)

The discovery that some B vitamins are constituents of respiratory coenzymes led to the development of an interfield theory of the kind discussed by Darden and Maull. In this paper it is shown that the development of a useful interfield connection was made possible by two reconceptualizations: a reconceptualization that united two then-distinct fields giving rise to the concept of vitamins as dietary substances; and another reconceptualization that united two approaches to respiratory metabolism producing the idea that coenzymes are transport (...) vehicles. (shrink)