would agree with Titchener as to introspection, but in his address minimized the importance of sensations, and of just those simple, 'presented' aspects of experience which Titchener had emphasized as the most promising for study. Hall warned the psychologist against mathematics, while Cattell correlated psychology with the physical sciences and emphasized the need of exact methods, and Titchener found a large place for quantitative work. The psychology of Ward and Hoeffding seemed tenuous by contrast with that of all these others, while that of Janet and Prince occupied a place apart. Yet all were able discussions of psychology of some sort, and beneath the troubled surface was a common interest in 'minds,' many fathoms deep.
In the section for social structure there were three speakers, the noted Austrian field marshal, Gustav Ratzenhofer, of Vienna, the eminent social philosopher, Professor Toennies, of Kiel, and our own distinguished sociologist and paleobotanist, Lester F. Ward, of the U. S. National Museum.
One would despair of doing justice to the eminent representatives of the great and beneficent science of modern medicine, even if there were space for the attempt. Happily here, as perhaps generally in the case of the so-called utilitarian and other applied sciences, it will only be necessary to mention the names of a few of the leaders that addressed the congress to awaken appropriate associations in the reader's mind. For, most of the distinguished visitors who shared in the work of these sections enjoy, in addition to scientific eminence, a merited popular fame. Professor Ronald Boss, of the School of Tropical Medicine at Liverpool, whose name is a household word through his work on the role of the mosquito in the etiology of malarial fever, came for preventive medicine; Sir Lauder Brunton, of London, and Oscar Liebreich. of Berlin, for therapeutics and pharmacology; T. Clifford Allbutt, of Cambridge, for internal medicine; Sir Felix Semon, of London, for otology and laryngology; Theodor Escherich, of Vienna, for pediatrics; Shibasaburo Kitasato, of Tokio, bacteriologist and possibly Japan's most eminent man of science, for neurology. Many of our ablest American physicians and surgeons addressed the medical sections. In the only section which the writer was able to attend, that of psychiatry, after the excellent papers by Dr. Charles L. Dana, of New York, and Dr. Edward Cowles, of Boston, interesting remarks were made by several workers in neurology, psychiatry, and outlying fields, including such men as Janet, Hall, Ladd, Marshall, Prince, Meyer and Putnam.
The sections in technology, including the various branches of engineering, technical chemistry and agriculture, were conducted by prominent Americans, although the interest in this part of the program was scarcely commensurate with its importance. President Humphreys, of Stevens Institute, Professor Kennelly, of Harvard, Mr. John Hays Hammond, of New York, Professor Liberty H. Bailey, of