The connection between physiology and intellectual philosophy
A mid-nineteenth-century London treatise by John Barlow, published by William Pickering in 1846, argues about how physiology bears on the study of the mind and was aimed at readers of philosophy and medicine. Its pictures are plain pen-and-ink diagrams of brains seen from above and from the side, set beside a simple cross-section of a nerve-ganglion mass, with dashed lines linking the stages of comparison; a designer could borrow their clear, schematic linework for scientific diagrams.
