Historians of psychology usually pay relatively little attention to this type of event, but anyone who wishes to grasp the meaning of the world of psychology that opened up to man at the end of the eighteenth century, where men have subsequently sought in ever greater depth their own truths, to the point of now trying to decipher there everything down to the last word, and anyone who wishes to know what psychology is, not as a body of knowledge but as fact and cultural expression unique to the modern world, does well to examine this trial and the manner in which it was conducted, as it is as important as the measurement of thresholds or theories of memory.