The bottle and pipette were then filled with the nutrient solution, care being taken that no bubbles were inclosed beneath the stopper. Loss in weight of the plant and container gave the amount of transpiration, while the loss of solution from the pipette gave the amount of root absorption after temperature corrections were made. These temperature corrections were made by comparing these pipette readings with those of a pipette in a similar bottle containing no plant, but exposed to the same set of conditions. Transpiration was measured in grams while absorption was measured in cubic centimeters, but as the variations in density of the solutions for these temperature ranges were small in comparison to the actual values dealt with this correction was not made. The experiment was performed on November 6, 1919, in the diffused light of the laboratory during a period when variations in temperature and the index of evaporation were slight. periods the ratio values decreased very much. LABORATORY OF PLANT PHYSIOLOGY, EXPERIMENT STATION THE AMERICAN MATHEMATICAL SOCIETY THE two hundred and twelfth regular meeting of the society was held at Columbia University on Saturday, October 30, 1920, ex tending through the usual morning and afternoon sessions. The attendance included thirty-five members. President Morley occupied the chair. The council announced the election of the following persons to membership in the society: Dr. P. M. Batchelder, University of Texas; Miss Vevia Blair, Horace Mann School; Mr. E. H. Carus, La Salle, Ill.; Mr. W. E. Cederberg, University of Wisconsin; Mr. R. P. Conkling, Newark Technical School; Mr. P. H. Evans, Northwestern Mutual Life Insurance Company, Milwaukee, Wis.; Mr. B. L. Falconer, U. S. Civil Service Commission, Boston, Mass.; Mr. J. A. Foberg, Crane Junior College, Chicago, Ill.; Dr. Gladys E. C. Gibbens, University of Minnesota; Professor L. E. Gurney, University of the Philippines; Professor Archibald Henderson, University of North Carolina; Miss Jewell C. Hughes, University of Arkansas; Miss Claribel Kendall, University of Colorado; Mrs. M. I. Logsdon, University of Chicago; Mr. R. L. McNeal, General Motors Laboratories, Detroit, Mich.; Mr. H. L. Olson, University of Michigan; Professor Leigh Page, Yale University; Captain H. W. Rehm, Aberdeen Proving Ground, Md.; Mr. Irwin Roman, Northwestern University; Mr. Raleigh versity; Mr. Raleigh Schorling, Lincoln School, New York City; Mr. E. L. Thompson, Junior College, Joliet, Ill.; Dr. Bird M. Turner, University of Illinois. Four applicacations for membership in the society were received. A committee was appointed to audit the accounts of the Treasurer for the current year. A list of nominations of officers and other members of the council was adopted and ordered printed on the official ballot for the annual meeting in December. The treasurer of the society to be elected at the annual meeting was made curator of all property belonging to the society. It was announced that the next summer meeting of the society will be held, in conjunction with that of the Mathematical Association of America, at Wellesley College. The following papers were read at the October meeting: H. S. Vandiver: "On Kummer's memoir of 1857 concerning Fermat's last theorem." R. L. Borger: "On total differentiability." Elizabeth LeStourgeon: "Minima of functions of lines." Joseph Lipka: "Complete geometric characterization of the dynamical trajectories on a surface for any positional field of force." Joseph Lipka: "Complete geometric characterization of the brachistrochrones, catenaries, and velocity curves on a surface." Dunham Jackson: "On the convergence of certain polynomial approximations." J. F. Ritt: "On algebraic functions which can be expressed in terms of radicals." 66 A. A. Bennett: The Schwarz inequality for a given symmetrical convex region and given bilinear form." Edward Kasner: "Determination of an Einstein gravitational field by means of the paths of free particles." O. E. Glenn: "An algorism for differential invariant theory." T. H. Gronwall: "Some inequalities in the theory of functions of a complex variable." W. L. G. Williams: "Fundamental systems of formal modular semi-variants of the binary cubic." The Southwestern Section will meet at the University of Nebraska on November 27. The annual meeting of the society will be "The Peltier effect," by E. H. Hall. "New facts bearing on the structure of the helium atom," by R. A. Millikan. "The measurement of the ionizing potential of metallic surfaces," by R. A. Millikan. "Further progress in the extreme ultra-violet," by R. A. Millikan. "Fluorescence and chemical change in very intense light fields," R. W. Wood. "A high speed photographic recording galvanometer for laboratory or technical use," by A. Trowbridge. "Explosions of mixtures of coal gas and air under constant volume conditions,' by A. Trowbridge. Excursion to the Rockefeller Institute (department of animal pathology). Inspection of grounds and buildings, followed by luncheon as guests of the institute. Afternoon Session "A post-war use of war material," by L. O. Howard. "The investigation of the flora of northern South America by the United States National Museum, the Gray Herbarium of Harvard University and the New York Botanical Garden," by N. L. Britton. "The segregation and control of the light producing substances in organisms,'' by U. Dahlgren (introduced by E. G. Conklin). "Rose Atoll, Samoa," by A. G. Mayor. (By title.) "The tectonic conditions accompanying the intrusion of basic and ultrabasic igneous rocks," by W. N. Benson (introduced by Arthur L. Day.) (Read by title.) "The oldest forest," by John M. Clarke. "The evolution of the Proboscidea," by H. F. Osborn. "The struggle between sun and ice for the past ten thousands of years," by Baron Gerhard DeGeer (introduced by H. F. Osborn). "Unusual features of sedimentation in the Pennsylvanian strata, Bingham Canyon, Utah," by J. F. Kemp. "Some geologic conclusions from geodetic data," by W. Bowie (introduced by A. O. Leuschner). "Origin of the North and South American faunas," by W. B. Scott. "The red layer, a contribution to the stratigraphy of the White River Oligocene," by W. J. Sinclair (introduced by W. B. Scott). Reception by President and Mrs. Hibben for members of the Academy and guests, at "Prospect.' "The molecular state of water vapor," by J. Kendall (introduced by M. T. Bogert). "The correlation of solubility, compound formation, ionization and electroaffinity in solution," by J. Kendall (introduced by M. T. Bogert). "The Corbino effect in iron," by E. P. Adams (introduced by H. N. Russell). "The application of a differential thermometer in ebullioscopy," by W. C. Menzies (introduced by Oswald Veblen). "Occurrence of copper and zinc in marine animals and calcareous muds,'' by A. H. Philips (introduced by W. B. Scott). "Experiments on electrical conduction in a hydrogen alloy," by Donald P. Smith (introduced by Oswald Veblen). Afternoon Session "Biological aspects of the process of infection," by Theobald Smith. "Typhus fever; with description of the etiology," by S. B. Wolbach (introduced by W. T. Councilman). "Changes in the ear of the rat on the inception of hearing," by H. H. Donaldson. "Experiments on the development of the gills in amphibians," by R. G. Harrison. "An important period in the process of synapsis," by C. E. McClung. "The sexual cycle of the larval bull-frog," by W. W. Swingle (introduced by E. G. Conklin). "The basal metabolism of girls 12 to 17 years of age," by F. G. Benedict. "Growth on diets poor in true fats," by L. B. Mendel. (By title.) A Weekly Journal devoted to the Advancement of Science, publishing the official notices and proceedings of the American Association for the Advancement of Science Published every Friday by THE SCIENCE PRESS LANCASTER, PA. GARRISON, N. Y. NEW YORK, N. Y. Entered in the post-office at Lancaster, Pa., as second class matter Cornell University Medical College Washington University 1st Avenue and 28th Street NEW YORK, N. Y. ADMISSION to the first year class will be limited to seventy-five students in the New York and Ithaca Divisions combined. Subsequent admissions to any class will be made only if the number falls below sixty, when students from other institutions may be accepted, provided they fill all of our requirements. The number of students in this College having been limited, that its advantages may be equalized to all parts of the State and country, not more than five students from any one college will be admitted to the first year class. Graduates of approved colleges are eligible. INSTRUCTION begins September 27th, 1920. Laboratory methods are emphasized throughout the course and small sections acilitate personal contact between the students and instructor. Clinical instruction is given in the Bellevue, New York Nursery and Child's, Memorial, Manhattan State and Willard Parker Hospitals. The tuition fee is $250.00 per annum. Applications for admission to the first year should be received not later than July first. A catalogue and application blanks may be obtained by addressing the Dean. Address THE DEAN, 477 1st Ave., New York, N. Y. School of Medicine REQUIREMENTS FOR ADMISSION Candidates for entrance are required to have completed at least two full years of college work which must include English, French or German, and instruction with laboratory work in Physics, Chemistry and Biology. INSTRUCTION Instruction begins on the last Thursday in September and ends on the second Thursday in June. Clinical instruction is given in the Barnes Hospital and the St. Louis Children's Hospital, affiliated with the medical school, the St. Louis City Hospital, and in the Washington University Dispensary. COURSES LEADING TO ACADEMIC Students who have taken their premedical work in Washington University, are eligible for the degree of B.8. upon the completion of the first two years of medical work. Students in Washington University may pursue study in the fundamental medical sciences leading to the degree of A.M. and Ph.D. TUITION The tuition fee for undergraduate medical students is $200 per annum. Women are admitted. The catalogue of the Medical School and other information may be obtained by application to the Dean. Euclid Avenue and Kingshighway St. Louis Syracuse University College of Medicine Tulane University of Entrance Two years of a recognized course in arts or in science in a registered college or Requirements School of Science, which must include Physics, Chemistry, Biology, and French or German. Six and seven years' combination courses are offered. The First Two Years The Third Year Course The Fourth Year Course is clinical. Students spend the entire forenoon throughout the year as clinical clerks in hospitals under carefu! supervision. The elinical clerk takes the history, makes the physical examination and the laboratory examinations, arrives at a diagnosis which he must defend, outlines the treatment under his instructor and observes and records the result. In case of operation or of autopsy he follows the specimen and identifies its pathological nature. Two general hospitals, one of which is owned and controlled by the University, one special hospital and the municipal hospitals and laboratories are open to our students The afternoons are spent in the College Dispensary and in clinical work in medical and surgical specialties and in conferences. Summer School-a summer course in pathology covering a period of six weeks during June and July will be given in case there is a sufficient number of applicants. Address the Secretary of the College, 307 Orange Street Louisiana SCHOOL OF MEDICINE (Established in 1834) ADMISSION: All students entering the Freshman Class will be required to present credits for two years of college work, which must include Chemistry General and Organic), Physics and Biology, with their laboratories, and at least one year in English and one year in a modern foreign language. COMBINED COURSES: Premedical course of two years is offered in the College of Arts and Sciences, which provides for systematic work leading to the B.S. degree at the end of the second year in the medical course. School of Pharmacy, School of Dentistry and Graduate School of Medicine also. Women admitted to all Schools of the College of Medicine For bulletins and all other information, address Tulane College of Medicine P. O. Box 770 New Orleans, La. University of Georgia Rush Medical College MEDICAL DEPARTMENT Augusta, Georgia ENTRANCE REQUIREMENTS The successful completion of at least two years of work including English, Physics, Chemistry, and Biology in an approved college. This in addition to four years of high school. INSTRUCTION The course of iustruction occupies four years, beginning the second week in September and ending the first week in June. The first two years are devoted to the fundamental sciences, and the third and fourth to practical clinic instruction in medicine and surgery. All the organized medical and surgical charities of the city of Augusta and Richmond County, including the hospitals, are under the entire control of the Board of Trustees of the University. This agreement affords a large number and variety of patients which are used in the clinical teaching. Especial emphasis is laid upon practical work, both in the laboratory and clinical departments. TUITION The charge for tuition is $150,00 a year except for residents of the State of Georgia, to whom tuition is free. For further information and catalogue address The Medical Department, University of Georgia AUGUSTA, GEORGIA Marine Biological Laboratory WOODS HOLE, MASS. 1. Zoology. Preserved material of all types of animals for class work and for the museum. 2. Embryology. Stages of some invertebrates, fishes (including Acanthias, Amia and Lepidosteus), Amphibia, and some mammals. 3. Botany. Preserved material of Algae, Fungi, Liverworts, Mosses, Ferns and Seed Plants. 4. Microscope slides in Bacteriology, Botany and Zoology. 5. Life Histories, Germination Studies, and Natural History Groups. Catalogues furnished on application to GEORGE M. GRAY, Curator MERCURY C. P. and redistilled in any quantity THE CHEMICAL PRODUCTS CO. 2715 St. Clair Ave., N. E. IN AFFILIATION WITH The University of Chicago Curriculum.-The fundamental branches (Anatomy, Physiology, Bacteriology, etc.) are taught in the Departments of Science at the Hull Biological and the Ricketts Laboratories, University of Chicago. The courses of the three clinical years are given in Kush Medical College and in the Presbyterian, the Cook County Hospital, the Home for Destitute Crippled Children, and other hospitals. Classes Limited.-The number of students admitted to each class is limited, selection of those to be admitted is made on the basis of merit. Hospital Year.-The Fifth Year, consisting of service as an interne under supervision in an approved hospital, or of advanced work in one of the departments is prerequisite for graduation. Summer Quarter.-The college year is divided into four quarters, three of which constitute an annual session. The summer quarter, in the climate of Chicago is advantageous for work. Students are admitted to begin the medical courses only in the Autumn and Spring quarters. Elective System.-A considerable freedom of choice of courses and instructors is open to the student. 1 Graduate Courses. Advanced and research courses are offered in all departments. Students by attending summer quarters and prolonging their residence at the University of Chicago in advanced work may secure the degree of A.M., S.M., or Ph.D. from the University. Prize Scholarship.-Six prize scholarships-three in the first two years and three in the last two (clinical) years-are awarded to college graduates for theses embodying original research. The Winter quarter commences January 3, 1921. TUITION $75.00 per quarter, no laboratory fees. Complete and detailed information may be secured by addressing THE MEDICAL DEAN The University of Chicago NOW READY CHICAGO, ILL. The Physics of the Air By WILLIAM J. HUMPHREYS, Ph.D. Professor of Meteorological Physics, United States Weather Bureau A rational and deductive treatise on the physics of the atmosphere. Of great value to meteorologists, physicists and the aviator. 678 Pages, Illustrated, Index, 8vo. Price, $5 Address orders and inquiries to THE FRANKLIN INSTITUTE PHILADELPHIA, U. S. A. OPTIC PROJECTION Principles, installation and use of the Magic Lantern, Opaque THE RAT Data and Reference Tables. 278 Pages. 89 Tables, Bibliography. Compiled and Edited by HENRY H. DONALDSON. Postpaid, $3.00. The Wistar Institute Philadelphia, Pa. |