Fig. 1From: Identifying eighteenth century pigments at the Bodleian library using in situ Raman spectroscopy, XRF and hyperspectral imagingFerdinand Bauer, colour coded sketch for Iris germanicus, Graphite pencil on paper, 1786-7 (MS. Sherard 243/38) © Bodleian Libraries, University of Oxford, 2017Back to article page