The University of California Press Berkeley, California 280 Madison Avenue, New York THE GAME BIRDS OF CALIFORNIA By J. Grinnell, H. C. Bryant and Large 8vo, pp. x+642, 16 colored plates, 94 figures in A detailed description of every one of the 108 native game birds of the state, comprising a practically complete summary of our knowledge of each up to the present time. The plan of treatment of each bird follows a regular sequence: Technical portion (in small type): Accepted common and scientific names; other names; description; adult male, adult female, juvenile, downy young; marks for field identification; voice; nest; eggs; general distribution; distribution in California. Text (in large type): General and local distribution; migration; field marks; life history: nest, eggs, young; habits and behavior; food; economic value; present and probable future status. Complete lists of titles and prices of all publications of the University of California Press will be sent on request. SPENCER MICROSCOPES After 100 per cent. Government Service during the war, are again ready to serve the critical needs of peaceful pursuits. We are pleased to announce that we are now ready to accept orders for early delivery. With greatly enlarged factory facilities, backed by the most ideal optical glass factory in America-possibly the world-one of the marvels of the war, we are better prepared than ever before to supply the "best in Scientific Instruments." Let us know your needs. American Made No. 44H Microscope, $90 New and Standard Texts AGRICULTURE BOYLE'S VEGETABLE GROWING. New work. ANATOMY BOWEN'S APPLIED ANATOMY AND KINESI- Cloth, $7.50 net; 34 leather, net, $9.00 BACTERIOLOGY ABBOTT'S BACTERIOLOGY. Ninth Edition. LABORATORY METHODS OF THE U. S. ARMY. Cloth, net, $3.00 706-8-10 Sansom Street PHILADELPHIA Cloth, net, $4.75 LEA & FEBIGER 2 West 45th Street NEW YORK The Journal of General Physiology EDITED BY JACQUES LOEB, New York W. J. V. OSTERHOUT, Cambridge, Mass. The Journal of General Physiology is devoted to the explanation of life phenomena on the basis of the physical and chemical constitution of living matter. The Journal of General Physiology is issued bimonthly, one volume of about 600 pages appearing in a year. Contributions should be addressed to the editors of The Journal of General Physiology, The Rockefeller Institute for Medical Research, Avenue A and 66th Street, New York, or 60 Buckingham Street, Cambridge, Massachusetts. The papers should preferably not exceed twenty printed pages, not counting the space occupied by illustrations. Authors receive one hundred reprints of their papers free of charge; additional copies may be obtained at cost. Subscription price per year (one volume), $5.00 CONTENTS OF VOLUME I, No. 3, JANUARY 20, 1919 Redfield, ALFRED C., and BRIGHT, ELIZABETH M. Temperature coefficient of the action of B-rays upon the egg of Nereis. MCCLURE, CHARLES F. W. On the experimental production of edema in larval and adult anura. HARVEY, E. NEWTON. Studies on bioluminescence. IX. Chemical nature of Cypridina luciferin and Cypridina luciferase. OSTERHOUT, W. J. V., and HAAS, A. R. C. The temperature coefficient of photo synthesis. OSTERHOUT, W. J. V. A comparative study of permeability in plants. UHLENHUTH, EDUARD. Nature of the retarding influence of the thymus upon amphibian metamorphosis. UHLENHUTH, EDUARD. Parathyroids and calcium metabolism. BOVIE, W. T., and HUGHES, D. M. BOVIE, W. T., and KLEIN, ALICE. short wave-lengths. Rate of recovery from the action of fluorite rays. Sensitization to heat due to exposure to light of LOEB, JACQUES. The physiological basis of morphological polarity in regeneration. I. LOEB, JACQUES. Amphoteric colloids. III. Chemical basis of the influence of acid upon the physical properties of gelatin. 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