J.R. Nielsen – författare

The influence of Niels Bohr''s work, of his approach to research, both practical and theoretical, is widely felt today. His contributions to our knowledge of the atomic constituents of matter and to our view of science, remain of fundamental importance.The publication of his collected works will give historians of science and scientists easy access to a life-work entirely devoted to the rational analysis of the laws of nature and of the singular character of their meaning for us.In addition to Bohr''s published papers, the series includes unpublished manuscripts and a wide selection of letters and other documents, with explanatory notes.

During this period Bohr''s researches had a double aim: to develop a consistent and adequate quantum theory and to explain the structures and properties of the elements of the periodic system. ``The Correspondence Principle'''' contains the papers and manuscripts dealing mainly with the elaboration of the general quantum theory.

Whilst volume 3 dealt primarily with the development of the quantum theory, ``The Periodic System'''' contains in 2 parts the papers treating the application of the theory to the problem of atomic structure and the explanation of the periodic system of the chemical elements.