Werner's Nomenclature of Colours

In the late 1790's Abraham Gottlob Werner devised his own standardised colour scheme, which allowed the writer to describe even the subtlest of chromatic differences with consistent terminology. His scheme was then adapted by an Edinburgh flower painter, Patrick Syme, who traced the actual minerals described by Werner, and used them to create the colour charts found in the book. In the pre-photographic age, almost all visual details had to be captured using the written word, and scientific observers could not afford any ambiguity in their descriptions. These included Charles Darwin, for whom Werner's Nomenclature was an indispensable tool during his seminal voyage on the Beagle.