Observations on some of the colouring matters of the bile and urine, with especial reference to their origin : and on an easy method of procuring haematin from blood
A late nineteenth-century medical treatise by Charles Alexander MacMunn, published in London in 1883 by an unnamed publisher, and held by the Royal College of Surgeons of England, for physicians and chemists studying bile and urine pigments. Its single plate is a dense grid of tonal bands, with pale and dark cells shifting in strength from row to row, like a chart of absorption spectra. A designer might take from it the rhythm of stacked horizontal strips and the way gradual gradients read as a measured scientific scale.
