Further observations on enterochlorophyll, and allied pigments
A scientific paper from 1886 by Charles Alexander MacMunn and Michael Foster, printed in London by Harrison and Sons, on chlorophyll and bile pigments, likely written for physiologists and chemists. Its plates show spectroscopic absorption bands as banded grey strips and microscope drawings of yellow-green cells and crystal-like forms on a pale ground, offering a designer clean, systematic grids of stripes and scattered radiating clusters.

