The psychology of suggestion; a research into the subconscious nature of man and society
A 1898 psychology treatise by Boris Sidis, published in New York by D. Appleton & Company, examining suggestion and the subconscious mind. The pictures are rotated scans of plates: hand-traced and rolled-paper line graphs of recorded tracings in white on black, alongside a diagram of lettered circles linked by lines above rows of stippled spheres. A designer might take from them the look of early scientific charts, with jagged waveforms and schematic node networks.
