science

"Kekule made his fundamental discovery in organic chemistry having had a dream image in which a snake was coiled in such a way as to represent the molecular structure of benzine. Faraday claimed to have visualised lines of force that emanated from electric and magnetic sources, resulting in the modern conception of electromagnetic fields. Tesla reported that he could determine how well a machine would work by mentally 'running' it in his mind. Feynman claimed to have used visual images in thinking about interactions among elementary particles, which led to the development of Feynman Diagrams..."

from Finke Ward Smith Creative Cognition MIT 1992 p.45

psychology

"A few large inkblots are thrown on a piece of paper, the paper folded and the ink spread between the two halves of the sheet. Not all figures so obtained can be used, for those used must fulfill certain conditions. In the first place the forms must be relatively simple; complicated pictures make the computation of the factors of the experiment too difficult. Furthermore, the distribution of the blots on the plate must be thoroughly tried out before it can be used as apparatus for the test..." Hermann Rorschach, Psychodiagnostik, 1921 translated in Klopfer Davidson beneath.

"The Rorschach method offers a procedure through which the individual is induced to reveal his 'private world' by telling what he 'sees' in the several cards upon which he may project his meanings, significance and feelings... L.K.Frank, in Klopfer Davidson beneath.

Bruno Klopfer and Helen Davidson, The Rorschach Technique, An Introductory Manual, HBJ, New York