Science July-December 1932. (fél évfolyam) [antikvár]

SCIENCE Vol. 76 Friday, July 1, 1932 No. 1957 The Worlc of Joseph Henry in Relation to Applied Science and Engineering: PROrEsson Arthur E. Kennelly 1 OUtuary: Nathan Augustus CohT): Dr. G. Steiner 8 Scientific Events: The North India Expedition of Yale University; Unemployment among Chemists and Chemical Engineers; Honorary Degrees at Harvard and Yale 9 Scientific Notes and News 11 Discussion: The Word Algelra: Professor G. A. Miller. Cross-inoculation Studies with Species of the Genus Ehisobium on the Roots of Florida Legumes: Professor William E. Carroll. The Presence of a Distinct Insulin in Depancreatized Dogs after Pancreatectomy: Dr. Geo. H. Tuttle 14 Societies and Academies: The Illinois State Academy of Science: Dr. Harold E. Wanless. The New Hampshire Academy of Science: Professor Geo. W. White 16 Scientific Apparatus and Laboratory Methods: A Modified Medium for Plating L, acidophilus: Dr. Walter L. Kulp and Vinton White. Appa^ ratus for Very Gradual Change of Fluids: Professor J. Henry Walker, Jr 17 Special Articles: Ferrous Iodide as a Substitute for Vitamin A in Sats: Hazel C. Cameron. Dual Endocrine Activity of the Testes: D. Eoy McCullagh 18 Index to Volume LXXV i Science News SCIENCE: A Weekly Journal devoted to the Advancement of Science, edited by J. McEjien Cattell and published every Friday by the science press New York City: Grand Central Terminal Lancaster, Pa. Garrison, N. Y. Annual Subscription, $6.00 Single Copies, 15 Cts. SCIENCE is the officinl organ of the American Association for the Advancement of Science. Information regarding membership in the Association may be secured from the office of the pernmnent secretary, in the Smithsonian Institution Building, Washington, D. C. THE WORK OF JOSEPH HENRY IN RELATION TO APPLIED SCIENCE AND ENGINEERING" By Professor ARTHUR E. KENNELLY Harvard University and the Massachusetts Institute of Technology The pioneer work of Joseph Henry in physics, and especially in its department of electromagnetics, has justly claimed the principal attention of his biographers and students. Certain aspects of Henry's work in the physics of electromagnetic induction were the theme of that fine presentation last year by President J. S. Ames, of the Johns Hopkins University, in the first Joseph Henry lecture of this series. Henry also accomplished, however, so much in applied physics that without detracting in the least from his fame as a pure scientist and researcher in basic physics, it seems proper to consider, in this second Joseph Henry lecture, his achievements in relation to applied science and engineering. iThe second Joseph Henry Lecture, delivered before ™ Philosophical Society of Washington, on April 23, 1932 The lecture was illustrated by lantern slides showing Henry's apparatus, as taken from authentic sources. As it is sometimes difficult to distinguish between basic and applied science, when considering the manifold occupations and accomplishments of a seientifie pioneer like Henry, we may be permitted to consider as basic those scientific studies directed to the development of a field of knowledge per se; and as applied science or engineering, those studies directed to utilities, as well as to the field itself. So interwoven, however, are basic and applied science, and especially in physics, that the distinction between them may sometimes be reduced to mere differences in the attitude of the researcher's mind. One and the same piece of scientific research may be regarded as either basic, or applied, or both, according as the researcher directed his mind to the field of knowledge itself or to its utilization, or to both. Henry's accomplishments in applied science are notable in' the following fields: