Kragh, H. (2001). Big-bang theory. I A. Hessenbruch (red.), Reader's Guide to the History of Science (s. 78-79). Fitzroy Dearborn Publishers, Incorporated.
Kragh, H. (2002). Electron atoms before and after Thomson. I H. Kragh, G. Vanpaemel & P. Marage (red.), History of Modern Physics: Proceedings of the XXth International Congress of History of Science (s. 175-182). Brepols Publishers.
Kragh, H. (2003). Physical theory: Past and future. I L. M. Dolling (red.), The Tests of Time: Readings in the Development of Physical Theory (s. 685-691). Princeton University Press.
Kragh, H. (2003). Paul Dirac. I J. Rigden (red.), Macmillan Encyclopedia of Physics: Building Blocks of Matter (s. 199-202). Gale.
Kragh, H. (2003). Cosmology. I J. Rigden (red.), Macmillan Encyclopedia of Physics: Building Blocks of Matter (s. 150-154). Gale.
Kragh, H. (2003). Hvad er videnskab? I H. Fink & H. Kragh (red.), Universitet og Videnskab: Universitetets Idehistorie, Videnskabsteori og Etik (s. 145-192). Hans Reitzels Forlag.
Kragh, H. (2003). Preface. I A. S. Jacobsen & H. Kragh (red.), H.C. Ørsted's Theory of Force: An Unpublished Textbook in Dynamical Chemistry (s. i-vi). Kgl. Danske Videnskabernes selskab.
Kragh, H. (2003). Paul Dirac: Purest soul in an atomic age. I K. Knox & R. Noakes (red.), From Newton to Hawking: A History of Cambridge University's Lucasian Professorship of Mathematics (s. 387-424). Cambridge University Press.
Kragh, H. (2000). Editors' preface. I H. Kragh, R. Stuewer & E. Rüdiger (red.), Carsten Jensen: Controversy and Consensus: Nuclear Beta Decay 1911-1934 (s. vi-x). Birkhäuser Verlag.