The Medicine Chest

Items

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  Forest

  "The bottles and pipettes in 'Forest' were originally sourced from the storage rooms of the Chemistry department, where they awaited disposal. This cabinet responded to the lacuna of indigenous material represented by the chest and addressed this imbalance by filling the bottles with teas made from local medicinal plants. Staging the bottles and pipettes to simulate a forest references the prejudice of Burroughs, Wellcome and Co (BWC) against these natural remedies, ‘purifying’ them through laboratory processes before they were deemed trustworthy and marketable. This process also occluded the original source of the remedies and sowed the seeds of biopiracy. The various items of glassware in this cabinet were filled with a selection of infusions made from Balotta africana, Sutherlandia frutescens, Agathosma crenulata, Melianthus major, Mentha longifolia, Petroselinum crispum, Hypoxiz villosa and Salvia officinalis" (Liebenberg 2021: 255).
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  Weighing Air

  An example from demonline (UCT Physics Department’s website with descriptions of educational demonstrations). Its descriptions reads: "A spherical flask of about 1 litre is suspended from one arm of a crude chemical balance. It is counterpoised by weights in the other pan, the tap attached to the sphere being open. This gives (roughly) the true weight of the glass. Unhook the sphere from the stirrup, attach the rubber tube from a rotary vacuum pump to the glass tube and evacuate for around 30s. Close tap, and re-attach stirrup. There will now be an upthrust on the flask equal to the weight of air removed, and the weights in the other pan will have to be reduced by about 1.2 g to restore the balance. Open the tap again: the air can be heard rushing into the flask (class must keep quiet), and the flask suddenly descends again".