'Of the Luctation ariseing upon the Mixture of Bodys' by Nehemiah Grew Observations of different types of bodies eg animal (shells, bones, horn), vegetables (roots, woods, seeds) and minerals (earths, stones, metals); whether these bodies make mixures with details of their nature eg whether they produced an effervescence; trying to make artificial mixtures in imitation of natural ones; what topics should be considered when compiling a natural history of a country Read at the Royal Society on 13 April 1676 1676