Front MatterSource: The Scientific Monthly, Vol. 9, No. 3 (Sep., 1919)Published by: American Association for the Advancement of ScienceStable URL: http://www.jstor.org/stable/6506 .

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Vol. 9, No. 3 SEPTEMBER, 1919

THE SCIENTIFIC MONTHLY

CONTENTS

THE BEGINNINGS OF HUMAN HISTORY READ FROM THE GEOLOGICAL RECORD: THE EMERGENCE OF MAN. PROFESSOR JOHN C. MERRIAM . . 193

SOME CHARACTERISTICS OF THE RAINFALL OF THE UNITED STATES. PROFESSOR ROBERT DEC. WARD 210

MAN AND HIS NERVOUS SYSTEM IN THE WAR.. PROFESSOR F. H. PIKE . 224 'iILLIAM HENRY PERKIN. PROFESSOR BENJAMIN HARROW . .. . . . . . 234

THE PSYCHOLOGICAL MOMENT. DR. HARRY D. KITSON ...... . . . 246

THE SUN, HEALTH AND HELIOTHERAPY. DR. GuY HINSDALE . ... .. . 253

THE NORTHERN FUR-SEAL PROBLEM AS A TYPE OF MANY PROBLEMS IN MARINE ZOOLOGY. DR. BARTON WARREN EVERMANN ....... 263

THE PROGRESS OF SCIENCE The Le Conte Memorial Lectures in the Yosemite Valley; The Directorship of the British Natural History Museum; Use of the Geophone by the Bureau of Mines; Scientific Items . . . . . . . . . . . . . . . . . . . . . . . . . 283

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ye s Cliege Txt=Book of Chemistry

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A History of Mathematics Second Edition, Revised and Enlarged. BY FLORIAN CAJORI, Ph.D., Professor of the History of Mathematics in the Univer- sity of California. Cloth, Octavo, 514 pages. To be published July 29th.

A complete revision of the first edition of Professor Cajori's work. The earlier portions of the book have been partly rewritten, and the chap- ters on recent mathematics are greatly enlarged and almost wholly new. Material is drawn only from the most reliable sources. In so far as the limits of a single volume permit, the author has covered the entire range of mathematical history.

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(Qualitative Analysis By GEORGE MCPHAIL SMITH, Associate Professor of Chemistry in the University of Illinois. Cloth, Octavo, 201 pages. To be published in August.

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The Journal of General Physiology is devoted to the explana-. tion of life phenomena on the basis of the physical and chemical constitu- tion of living matter.

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CONTENTS OF VOLUME I, No. 6, JULY 20, 1919 CROZIER, W. J. Intracellular acidity in Valonia. CROZIER, W. J. On the control of the response to shading in the branchiEe of Chromodoris. SWINGLE, W. W. Iodine and the thyroid. III. The specific action of iodine in accelerating am-

phibian metamorphosis. NORTHROP, J. H. The effect of various acids on the digestion of proteins by pepsin. MooRE, A. R. The respiratory rate of the sciatic nerve of the frog in rest and activity. FRED, E. B. The growth of higher plants in soils free of microorganisms. FRED, E. B., and HAAS, A. R. C. The etching of marble by roots in the presence and absence

of bacteria. MORGAN, T. H., and BRIDGES, CALVIN B. The inheritance of a fluctuating character. BRIDGES, CALVIN B. Vermilion-deficiency. HECHT, SELIG. The nature of the latent period in the photic response of Mya arenaria. HECHT, SELIG. The effect of temperature on the latent period 'in the photic response of Mya

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