Handbuch der physiologischen Optik
Handbuch der physiologischen Optik is a German scientific treatise on physiological optics by Hermann von Helmholtz, published in Leipzig by Leopold Voss in 1867 for researchers and students of vision. Its pictures are measured engraved plates: a spectrum strip beside optical apparatus diagrams, a pair of grids with black and white squares, and a branching nerve-cell drawing in dense ink, offering a designer clean technical linework, grid structure and organic branching forms.
