Unpublished paper, 'An account of the oxydation of silver by the Hindoos [Hindus], by means of vegetable substances, with some observations on the milk of plants' by Benjamin Heyne Heyne describes the use of metals in Hindu medicine, including quicksilver [mercury], iron, gold, and silver. He describes how silver is oxidised using vegetable juices and fire as a preparation for use in medical treatment. He then goes on to discuss these 'vegetable milks', focusing on those of opium [Papaver somniferum], gamboge [Garcinia xanthochymus], gum elastic [Ficus elastica], and euphorbia [Euphorbia resinifera?]. Minor corrections appear in ink throughout. Subject: Medicine / Botany Communicated by Sir Joseph Banks. Read to the Royal Society on 12 May 1814. [1814]