Histological basis of shank colors in domestic fowl
A 1914 scientific bulletin by Henry R. Barrows of the Maine Agricultural Experiment Station on the microscopic structure behind shank colour in domestic fowl, written for poultry geneticists and breeders. The pictures are rotated pages of paired microscope-style plates labelled Fig. with small dark cell clusters, scattered granules and arrowed marks on pale grey fields. A designer might take from them the sparse, diagrammatic look of early scientific plates, with dark speckled clusters set against flat tonal grounds.
