Mélange de Toutes les Couleurs Propres au Dessein du Plan manuscript, [1750-1800]
32 pages
This 32-page manuscript notebook, dated to the second half of the eighteenth century, is an instruction manual on the systematic use of color in mapmaking. Though the writer and exact date of publication are unknown, it is assumed that the writer was a master mapmaker and that this notebook was meant to be distributed to students who were learning how to make maps. An English translation of the notebook is published in "Coloring Manuscript Maps in the Eighteenth Century," Clements Library Occasional Bulletin 4 (January 2017): 5-11.
The writer begins by explaining the process that one should follow when preparing and using colors for a map. After the writer explains how to mix colors, they offer detailed notes about the use of eight main colors; a palette of those colors is found on page three of the manuscript. Throughout the rest of the manuscript, the writer explains how to mix colors and correctly render features like cultivated lands, meadows, pastures, woods, vineyards, mountains, trees, hedges, rocks, quarries, sand, and rivers. Interspersed throughout the manuscript is the writer's observations about common mapmaking mistakes and diagrams illustrating different techniques.