The Theory of the Top was originally presented by Felix Klein as an 1895 lecture at Goettingen University that was broadened in scope and clarified as a result of collaboration with Arnold Sommerfeld. The Theory of the Top: Volume IV. Technical Applications of the Theory of the Top is the fourth and final installment in a series of self-contained English translations that provide insights into kinetic theory and kinematics.

The Theory of the Top was originally presented by Felix Klein as an 1895 lecture at Goettingen University that was broadened in scope and clarified as a result of collaboration with Arnold Sommerfeld. The Theory of the Top: Volume IV. Technical Applications of the Theory of the Top is the fourth and final installment in a series of self-contained English translations that provide insights into kinetic theory and kinematics.

A. Sommerfeld's "Mathematische Theorie der Diffraction" marks a milestone in optical theory, full of insights that are still relevant today. In a stunning tour de force, Sommerfeld derives the first mathematically rigorous solution of an optical diffraction problem. Indeed, his diffraction analysis is a surprisingly rich and complex mix of pure and applied mathematics, and his often-cited diffraction solution is presented only as an application of a much more general set of mathematical results. This complete translation, reflecting substantial scholarship, is the first publication in English of Sommerfeld's original work. The extensive notes by the translators are rich in historical background and provide many technical details for the reader.

The Theory of the Top was originally presented by Felix Klein as an 1895 lecture at Gottingen University that was broadened in scope and clarified as a result of collaboration with Arnold Sommerfeld. The Theory of the Top: Volume III. Perturbations: Astronomical and Geophysical Applications is the third installment in a series of four self-contained English translations that provide insights into kinetic theory and kinematics."

The lecture series on the Theory of the Top was originally given as a dedication to Goettingen University by Felix Klein in 1895, but has since found broader appeal. The Theory of the Top: Volume I. Introduction to the Kinematics and Kinetics of the Top is the first of a series of four self-contained English translations that provide insights into kinetic theory and kinematics.

A. Sommerfeld's "Mathematische Theorie der Diffraction" marks a milestone in optical theory, full of insights that are still relevant today. In a stunning tour de force, Sommerfeld derives the first mathematically rigorous solution of an optical diffraction problem. Indeed, his diffraction analysis is a surprisingly rich and complex mix of pure and applied mathematics, and his often-cited diffraction solution is presented only as an application of a much more general set of mathematical results. This complete translation, reflecting substantial scholarship, is the first publication in English of Sommerfeld's original work. The extensive notes by the translators are rich in historical background and provide many technical details for the reader.

The Theory of the Top. Volume II. Development of the Theory in the Case of the Heavy Symmetric Top is the second in a series of four self-contained English translations of the classic and definitive treatment of rigid body motion. Graduate students and researchers interested in theoretical and applied mechanics will find this a thorough and insightful account. Other works in this series include Volume I. Introduction to the Kinematics and Kinetics of the Top, Volume III. Perturbations. Astronomical and Geophysical Applications, and Volume IV. Technical Applications of the Theory of the Top.

Am 6. Dezember 1915 und am 8. Januar 1916 legte Arnold Sommerfeld der Bayerischen Akademie der Wissenschaften zwei Abhandlungen im Umfang von 75 Druckseiten vor, mit denen er das Bohrsche Atommodell aus dem Jahr 1913 zur Bohr-Sommerfeldschen Atomtheorie erweiterte. In Sommerfelds Gesammelten Schriften findet sich nur die im Juli 1916 von Sommerfeld in den Annalen der Physik eingereichte Publikation daru ber. "Meine Spektrallinien sind endlich in der Akademie in's Unreine gedruckt. In den Annalen werden sie in gelauterter Form erscheinen," so hatte Sommerfeld am 10. Februar 1916 dem Herausgeber der Annalen der Physik diese Publikation angeku ndigt. Aus wissenschaftshistorischer Sicht sind fu r die Erweiterung der Bohrschen Atomtheorie jedoch gerade die vor dem Lauterungsprozess publizierten Akademieabhandlungen von besonderem Interesse. Der Reproduktion dieser Akademieabhandlungen wird ein ausfu hrlicher physikhistorischer Essay (ca. 100 Druckseiten) vorangestellt."