Le daltonisme et les altérations du sens visuel en général chez les agents de l'administration des chemins de fer : rapport présenté à M. le ministre des travaux publics
A French report on colour blindness and visual defects among railway administration staff, written by Dr A. Dekeersmaecker for the Belgian minister of public works and published in Brussels by H. Manceaux in 1881. The three pictures are technical line drawings of a triangle diagram with formulas, a spectroscopic curve over labelled Fraunhofer lines, and an engraved chromoptometer mounted on a wooden board, useful for designers wanting clean scientific diagram and instrument imagery.
