AFTER LIFE IN ROMAN PAGANISM YALE UNIVERSITY MRS. HEPSA ELY SILLIMAN MEMORIAL LECTURES SILLIMAN MEMORIAL LECTURES PUBLISHED BY YALE UNIVERSITY PRESS ELECTRICITY AND MATTER. _By_ JOSEPH JOHN THOMSON, D.SC., LL.D., PH.D., F.R.S., _Fellow of Trinity College and Cavendish Professor of Experimental Physics, Cambridge University_. (_Fourth printing._) THE INTEGRATIVE ACTION OF THE NERVOUS SYSTEM. _By_ CHARLES S. SHERRINGTON, D.SC., M.D., HON. LL.D. TOR., F.R.S., _Holt Professor of Physiology, University of Liverpool_. (_Sixth printing._) RADIOACTIVE TRANSFORMATIONS. _By_ ERNEST RUTHERFORD, D.SC., LL.D., F.R.S., _Macdonald Professor of Physics, McGill University_. (_Second printing._) EXPERIMENTAL AND THEORETICAL APPLICATIONS OF THERMODYNAMICS TO CHEMISTRY. _By_ DR. WALTER NERNST, _Professor and Director of the Institute of Physical Chemistry in the University of Berlin_. PROBLEMS OF GENETICS. _By_ WILLIAM BATESON, M.A., F.R.S., _Director of the John Innes Horticultural Institution, Merton Park, Surrey, England_. (_Second printing._) STELLAR MOTIONS. With Special Reference to Motions Determined by Means of the Spectrograph. _By_ WILLIAM WALLACE CAMPBELL, SC.D., LL.D., _Director of the Lick Observatory, University of California_. (_Second printing._) THEORIES OF SOLUTIONS. _By_ SVANTE ARRHENIUS, PH.D., SC.D., M.D., _Director of the Physico-Chemical Department of the Nobel Institute, Stockholm, Sweden_. (_Third printing._) IRRITABILITY. A Physiological Analysis of the General Effect of Stimuli in Living Substances. _By_ MAX VERWORN, M.D., PH.D., _Professor at Bonn Physiological Institute_. (_Second printing._) PROBLEMS OF AMERICAN GEOLOGY. _By_ WILLIAM NORTH RICE, FRANK D. ADAMS, ARTHUR P. COLEMAN, CHARLES D. WALCOTT, WALDEMAR LINDGREN, FREDERICK LESLIE RANSOME, AND WILLIAM D. MATTHEW. (_Second printing._) THE PROBLEM OF VOLCANISM. _By_ JOSEPH PAXSON IDDINGS, PH.B., SC.D. (_Second printing._) ORGANISM AND ENVIRONMENT AS ILLUSTRATED BY THE PHYSIOLOGY OF BREATHING. _By_ JOHN SCOTT HALDANE, M.D., LL.D., F.R.S., _Fellow of New College, Oxford University_. (_Second printing._) A CENTURY OF SCIENCE IN AMERICA. With Special Reference to the American Journal of Science 1818–1918. _By_ EDWARD SALISBURY DANA, CHARLES SCHUCHERT, HERBERT E. GREGORY, JOSEPH BARRELL, GEORGE OTIS SMITH, RICHARD SWANN LULL, LOUIS V. PIRSSON, WILLIAM E. FORD, R. B. SOSMAN, HORACE L. WELLS, HARRY W. FOOTE, LEIGH PAGE, WESLEY R. COE, AND GEORGE L. GOODALE. THE EVOLUTION OF MODERN MEDICINE. _By_ SIR WILLIAM OSLER, BART., M.D., F.R.S. (_Second printing._) RESPIRATION. _By_ J. S. HALDANE, M.D., LL.D., F.R.S., _Fellow of New College, Oxford, Honorary Professor, Birmingham University_.