PROBLEMS OF GENETICS

ELECTRICITY AND MATTER. By Joseph John Thomson,
 d.sc., ll.d., ph.d., f.r.s., Fellow of Trinity College,
 Cambridge, Cavendish Professor of Experimental Physics, Cambridge.
Price $1.25 net; postage 10 cents extra.

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 in the University of Liverpool.
Price $3.50 net; postage 25 cents extra.

RADIOACTIVE TRANSFORMATIONS. By Ernest Rutherford,
 d.sc., ll.d., f.r.s., Macdonald Professor of Physics, McGill University.
Price $3.50 net; postage 22 cents extra.

EXPERIMENTAL AND THEORETICAL APPLICATIONS OF
   THERMODYNAMICS TO CHEMISTRY.
 By Dr. Walther Nernst,
 Professor and Director of the Institute of Physical Chemistry in the University of Berlin.
Price $1.25 net; postage 10 cents extra.

THE PROBLEMS OF GENETICS. By William Bateson, m.a.,
 f.r.s., Director of the John Innes Horticultural Institution,
 Merton Park, Surrey, England.
Price $4.00 net; postage 25 cents extra.

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.
Price $4.00 net; postage 30 cents extra.

THEORIES OF SOLUTIONS. By Svante August Arrhenius,
 ph.d., sc.d., m.d., Director of the Physico-Chemical Department
 of the Nobel Institute, Stockholm, Sweden.
Price $2.25 net; postage 15 cents extra.

IRRITABILITY. A Physiological Analysis of the General
 Effect of Stimuli in Living Substances.
 By Max Verworn,
 Professor at Bonn Physiological Institute.
Price $3.50 net; postage 20 cents extra.

THE EVOLUTION OF MODERN MEDICINE.
 By Sir William Osler, Bart., m.d., ll.d., sc.d.,
 Regius Professor of Medicine, Oxford University.
Price $3.00 net; postage 40 cents extra.