audition was second in importance. Sight and hearing, which Helmholtz had already carefully studied, were the main themes of Wundt's laboratory. Some of the contributions to the Studien were by Wundt himself. Helmholtz is reported to have said of some of Wundt's experiments that they were schlampig (sloppy). Comparing Wundt to Helmholtz, who was a careful experimentalist and productive researcher, one must conclude that Wundt's most important contributions were as a systematizer, organizer, and encyclopedist. William James considered Wundt "only a rather ordinary man who has worked up certain things uncommonly well."
Wundt's Grundriss der Psychologie (1896; Outline of Psychology) was a less detailed treatment than his Principles, but it contained the new theory of feeling. A popular presentation of his system of psychology was Einführung in die Psychologie (1911; Introduction to Psychology). His monumental Völkerpsychologie (1912; Folk Psychology), a natural history of man, attempted to understand man's higher thought processes by studying language, art, mythology, religion, custom, and law. Besides his psychological works he wrote three philosophical texts: Logic (1880-1883), Ethics (1886), and System of Philosophy (1889). Wundt died near Leipzig on Aug. 31, 1920.