Manual of phrenology, or The physiology of the human brain : embracing a full description of the phrenological organs, their exact location, and the peculiarities of character produced by their various degrees of development and combination
Robert H. Collyer's 1839 Manual of Phrenology, printed in Cincinnati by N.G. Burgess & Co., was a popular American handbook explaining the phrenological organs of the brain and how their development shaped character. Its pictures are crisp wood-engraved profile heads marked with lettered lines that locate the organs, with a few bulbous malformed skulls; a designer could borrow their clean diagrammatic labelling and hatched line shading for period-style infographics.
