Includes bibliographical references.

From classical to quantum physics. Theoretical challenges by experim ental physics : radiation and its interaction with matter / Shaul Katzi r. Challenging the boundaries between classical and quantum physics : t he case of optical dispersion / Marta Jordi Taltavull. Putting the quan tum to work : Otto Sackur's pioneering exploits in the quantum theory o f gases / Massimiliano Badino and Bretislav Friedrich -- Quantum mechan ics in the making. The concepts of light atoms and light molecules and their final interpretation / Dieter Fick and Horst Kant. Early interact ions of quantum statistics and quantum mechanics / Daniela Monaldi. Pou rparlers for amalgamation : some early sources of quantum gravity resea rch / Dean Rickles -- Extending the framework of quantum physics. Super posing dynamos and electrons : electrical engineering and quantum physi cs in the case of Nishina Yoshio / Kenji Ito. The origins of Maria Gèop pert's dissertation on two-photon quantum transitions at Gèottingen's I nstitutes of Physics, 1920-1933 / Barry R. Masters. An act of creation : the Meitner-Frisch interpretation of nuclear fission / Roger H. Stuew er -- The challenges of quantum field theory. Tsung-Sui Chang's contrib ution to the quantization of constrained Hamiltonian systems / Xiaodong Yin, Zhongyuan Zhu, Donald C. Salisbury. Feynman's struggle and Dyson' s surprise : the development and early application of a new means of re presentation / Adrian Wèuthrich -- Traditions and debates in recent qua ntum physics. Orthodoxies on the interpretation of quantum theory : the case of the consistent history approach / Olival Freire. From do-it-yo urself quantum mechanics to nanotechnology? : the history of experiment al semiconductor physics, 1970-2000 / Christian Kehrt.