Helge Kragh has worked as Professor of History of Science at the University of Oslo, Norway, and Aarhus University, Denmark, and is presently Emeritus Professor at the University of Copenhagen. Since 2001 he has been a member of the Royal Danish Academy of Sciences and Letters, and 2008-2010 he served as President of the European Society for History of Science. Most of his research has focused on the historical development of post-1800 physics, chemistry, astronomy, and cosmology.
An important contribution to the history of science, clearly written, informative, and thoroughly documented in extensive use of primary and secondary sources. * Theodore Arabatzis, University of Athens * A masterfully organized march through the dense terminological thickets of myriade scientific fields (astronomy, cosmology and other physical sciences, chemical, bio & geo-sciences), with a plethora of fascinating examples for how and by whom scientific terms were coined and how hard it often was to get them accepted. * Klaus Hentschel, author of Photons: The History of the Concept and Mental Models of Light Quanta (2018) * An important and welcome publication. * Allison Bigelow, University of Virginia *