D. APPLETON & CO., Publishers,
1, 3, & 5 Bond Street, New York.
SCIENTIFIC LECTURES AND ESSAYS.
Popular Lectures on Scientific Subjects. By H. Helmholtz, Professor of Physics in the University of Berlin. First Series. Translated by E. Atkinson, Ph. D., F. C. S. With an Introduction by Professor Tyndall. With 51 Illustrations. 12mo. Cloth, $2.00.
CONTENTS.—On the Relation of Natural Science to Science in General.—On Goethe’s Scientific Researches.—On the Physiological Causes of Harmony in Music—Ice and Glaciers.—Interaction of the Natural Forces.—The Recent Progress of the Theory of Vision.—The Conservation of Force.—Aim and Progress of Physical Science.
Popular Lectures on Scientific Subjects. By H. Helmholtz. Second Series. 12mo. Cloth, $1.50.
CONTENTS.—Gustav Magnus.—In Memoriam.—The Origin and Significance of Geometrical Axioms.—Relation of Optics to Painting.—Origin of the Planetary System.—On Thought in Medicine.—Academic Freedom in German Universities.