CERTIFICATE OF MEDAL AWARDS STEIN, F. J. An Improved and Simplified System of Pitman Phonography.-1904. STEINMETZ, C. P.; DEMPSTER, J. T. H.; FLEMING, RICHARD; AND GENERAL ELECTRIC COMPANY. Magnetite Lamp.-1908. ST. JOHN, E. Q.; HEPBURN, J. S.; AND JONES, F. M. 66 Absorption of Nutrients and Allied Phenomena in the Pitchers of the Sarraceniaceæ" (Paper).-1921. TERMS AND PRIVILEGES OF MEMBERSHIP Members of the Institute shall consist of those engaged or interested in scientific pursuits or in the application of science in the mechanic and industrial arts. All persons interested in the purposes and activities of the Institute and who are willing to further them, may become members when proposed by members in good standing and elected by the Board of Managers. The membership of the Institute shall consist of the following classes of members; viz.: Honorary and Corresponding, Endowment, Life, Contributing, Resident, Nonresident, Student, and holders of Second Class Stock. Honorary and Corresponding members shall be nominated by the Board of Managers and shall require for their election four-fifths of the votes of the members present at any stated meeting of the Institute at which their nomination may be acted upon. They shall not be entitled to vote nor to hold office. All other members shall be elected by the Board of Managers. Endowment members shall consist of persons, firms, corporations or associations who shall make an endowment payment of five thousand dollars ($5000) to the Institute, and who, upon acceptance thereof by the Board of Managers, shall thereafter have the privilege of nominating annually to the Board of Managers for election (subject to its discretion as to any particular nominee) as Resident members of the Institute for its then current year, without payment of dues, that number of persons, to be determined from time to time by the Board of Managers, whose annual dues, if they were paying annual Resident Membership dues, would approximately equal but not exceed the then current income from such endowment payments. Such Endowment Memberships shall be perpetual, and shall be transferable by the holders thereof by will or otherwise; provided, however, that the Board of Managers at any time may refund five thousand dollars ($5000) to the then holders of any such membership, and annul and terminate that membership. Contributing members shall consist of firms, corporations, associations or individuals who shall pay annually the sum of three hundred dollars ($300). A contributing member shall have the right to nominate nineteen persons to the Board of Managers for election as Resident members for the year then current, subject to the discretion of the Board as to any particular nominee, and members thus elected shall pay no dues. Resident Life members, whose membership shall not be transferable, are those members who shall pay the sum of three hundred dollars in any one year. Non-resident Life members shall be those members who reside permanently at a distance of not less than twenty-five miles from Philadelphia and who shall pay the sum of one hundred dollars in any one year. Resident members shall be residents of the City of Philadelphia who have been elected to membership in the Institute and who shall pay annual dues of fifteen dollars. Non-resident members shall be those members who reside permanently at a distance of not less than twenty-five miles from Philadelphia and who shall pay annual dues of five dollars. They shall also pay an initiation fee of five dollars. Student members shall be over sixteen and under twenty-two years of age. They shall pay annual dues of three dollars if they do not receive the JOURNAL of the Institute, and six dollars if they do receive the JOURNAL. The term of student members shall be limited by the age of twenty-two years, after which time they shall be eligible for transfer to the other types of membership upon the payment of the appropriate fee or dues. Privileges: All members, of whatever class, are entitled to participate in the meetings of the Institute, in the use of the Library, to receive tickets for the lectures and to receive monthly one copy of the JOURNAL of the Institute, except that student members, and honorary and corresponding members, shall not have the right to vote, nor to hold office, and student members paying the three dollars annual dues shall not receive the JOURNAL of the Institute. Resignations must be made in writing, and dues must be paid to the date of resignation. Membership Badges.-Pin or button form, may be purchased from the Controller for One Dollar. All badges are numbered and the owner's name and number recorded. For further information and membership application blanks address the SECRETARY OF THE INSTITUTE. MEETINGS AND LECTURES 1926-1927 Wednesday, October 20. Dr. W. D. Coolidge, Laboratories of the General Electric Company, Schenectady, New York, "The Production of High Voltage Cathode Rays Outside of the Generating Tube." Thursday, October 28. Meeting in celebration of "Management Week." Thursday, November 4. William F. Parish, Esq., Consulting Lubrication Engineer, New York City, "The Distillation of Petroleum for the Manufacture of the Lubricating Oils." Thursday, November 11. Howard T. Barnes, D.Sc., Professor of Physics, McGill University, "Thermit and Icebergs." Wednesday, November 17. Richard C. Tolman, Ph.D., Professor of Physical Chemistry and Mathematical Physics, California Institute of Technology, "Statistical Mechanics and Its Application to Physical-Chemical Problems." Thursday, December 2. Hugh Stott Taylor, D.Sc., Professor of Physical Chemistry, Princeton University, "Atomic Hydrogen and the Mechanism of Catalysis." Thursday, December 9. John Quincy Stewart, Ph.D., Professor of Astronomical Physics, Princeton University. “Hypotheses Regarding the Source of the Energy of Sun and Stars." Wednesday, December 15. Nevin E. Funk, Operating Engineer, Philadelphia Electric Company, Philadelphia, Pa., "Unusual Engineering Features of the Conowingo Dam and Power Plant." Thursday, January 13. Bergen Davis, Ph.D., Department of Physics, Columbia University, "Refraction of X-rays.” Wednesday, January 19. Thomas Midgeley, Jr., Esq., Research Chemist, Dayton, Ohio, "Anti-Knock Motor Fuel." Thursday, January 27. George W. Morey, Ph.D., Geophysical Laboratory, Thursday, February 3. L. B. Stiles, C.E., Construction Engineer, The Brook- Wednesday, February 16. B. S. Hopkins, Ph.D., Department of Chemistry, Thursday, February 24. H. B. Williams, Ph.D., College of Physicians and Surgeons, Columbia University, "Physical Instruments in Medical Service." Thursday, March 3. J. H. Dellinger, Ph.D., Senior Physicist, Bureau of Standards, Dept. of Commerce, Washington, D. C., “Directive Radio Transmission." Thursday, March 10. L. P. Alford, Editor, "Manufacturing Industries," New York City, "Safety and Production." Wednesday, March 16. C. H. Kunsman, Ph.D., Physicist, Fixed Nitrogen Research Laboratory, Bureau of Soils, Department of Agriculture, Washington, D. C., "The Thermionic Emission From Iron Alkali Mixtures Used as Catalysts in the Synthesis of Ammonia." Thursday, March 24. Robert H. Gault, Ph.D., Director, Vibro-Tactile Research Laboratory, Smith College, Northampton, Mass., "The Interpretation of Speech by Tactual and Visual Impression." Thursday, March 31. H. A. Lorentz, Ph.D., F.R.S., Professor of Physics, University of Leiden, Holland, How Does an Atom Radiate Light?" Thursday, April 7. Edward Capps, Professor, Department of Classics, Princeton University, Princeton, N. J., Chairman of Managing Committee, American School of Classical Studies at Athens, "Excavation of Athens." Thursday, April 14. W. F. G. Swann, Sc.D., Director, Sloane Physics Laboratory, Yale University, New Haven, Conn., "What Is Left of the Atom." Wednesday, April 20. A. H. Markwart, Vice-President, Pacific Gas and Electric Company, San Francisco, California, "Power in California." Wednesday, May 18. Medal Day. BARTOL RESEARCH FOUNDATION LECTURES LECTURES BY R. WHIDDINGTON, M.A., D.Sc., F.E.S. CAVENDISH PROFESSOR OF PHYSICS, DEAN OF THE FACULTY OF SCIENCE, Wednesday, October 13, 1926, at Four O'Clock, P.M. THE LUMINOUS DISCHARGE THROUGH RARE GASES LECTURES BY PROFESSOR R. C. TOLMAN CALIFORNIA INSTITUTE OF TECHNOLOGY November 17, at Eight-Fifteen O'Clock, P.M. November 22, 1926, at Four O'Clock, P.M. Wednesday, November 17-"THE METHODS OF STATISTICAL MECHANICS." Comparison of the methods of ordinary and statistical mechanics. Comparison of the methods of statistical mechanics and thermodynamics. Ensemble and phase. Phase spaces. Distribution of ensemble in phase. Change in density of distribution with time (Liouville's theorem). Application to molecular systems. Ergodic hypothesis. Friday, November 19-" SOME APPLICATIONS OF STATISTICAL MECHANICS TO SYSTEMS THAT ARE IN EQUILIBRIUM." The Maxwell-Boltzmann distribution law. The Maxwell distribution law. Molecular collisions. The general equipartition law. Modifications introduced by quantum theory. Use of new form of Maxwell-Boltzmann distribution law. Application of statistical mechanics to concentrated systems. The prin |