xviii
Acknowledgments
I am also very grateful to Springer and editor Ramon Khanna for their
willingness and help to publish this biography and the accompanying one
on Kapteyn’s most famous student Jan Hendrik Oort. The translation from
the original Dutch version has profited enormously from the availability of
DeepL Translator Pro version (www.deepl.com/), which provided an excellent
first step in translating the Dutch manuscript.
I would like to thank various organizations for support and help. The
help from the staff of the Archives and the Museum of the University of
Groningen was important and effective. This also holds for the staff of the
Archives at Cambridge University (UK), the California Institute of Technology (Pasadena, California) and the Huntington Library (San Marino, California), where I had access to correspondence of Kapteyn with a number of
astronomers.
For all reproductions, I have been granted permission for use in this book
by the holders of the copyrights. I am grateful for their help, particulary, the
Kapteyn Astronomical Institute, the University Museum Groningen and the
Sterrewacht Leiden.
I am grateful to the Kapteyn Institute, my colleagues (astronomers and staff
of the secretariat and of the computer group) for their help and support. I am
grateful to the directors, Reynier Peletier and Scott Trager for their hospitality
to generously accommodate an emeritus professor. Financial support came
from the Faculty of Mathematics and Natural Sciences, in the form of an
annual allowance associated with my honorary appointment to the specially
created distinguished Jacobus C. Kapteyn Chair in 2003 until my formal
retirement in 2009. The part of it that was left over has been used for this
project. I also profited from an allowance by the directorate Exact Sciences
of the Netherlands Organization for Scientific Research (EW-NWO) related
to my membership of its Board. The preparation of the manuscript for this
was also made possible by a further grant from EW-NWO, and from the
Netherlands Research School for Astronomy (NOVA).
And finally, I thank my wife Corry for her love, understanding and
support, with which she made it possible for me to write this book.
Acknowledgments
I am also very grateful to Springer and editor Ramon Khanna for their
willingness and help to publish this biography and the accompanying one
on Kapteyn’s most famous student Jan Hendrik Oort. The translation from
the original Dutch version has profited enormously from the availability of
DeepL Translator Pro version (www.deepl.com/), which provided an excellent
first step in translating the Dutch manuscript.
I would like to thank various organizations for support and help. The
help from the staff of the Archives and the Museum of the University of
Groningen was important and effective. This also holds for the staff of the
Archives at Cambridge University (UK), the California Institute of Technology (Pasadena, California) and the Huntington Library (San Marino, California), where I had access to correspondence of Kapteyn with a number of
astronomers.
For all reproductions, I have been granted permission for use in this book
by the holders of the copyrights. I am grateful for their help, particulary, the
Kapteyn Astronomical Institute, the University Museum Groningen and the
Sterrewacht Leiden.
I am grateful to the Kapteyn Institute, my colleagues (astronomers and staff
of the secretariat and of the computer group) for their help and support. I am
grateful to the directors, Reynier Peletier and Scott Trager for their hospitality
to generously accommodate an emeritus professor. Financial support came
from the Faculty of Mathematics and Natural Sciences, in the form of an
annual allowance associated with my honorary appointment to the specially
created distinguished Jacobus C. Kapteyn Chair in 2003 until my formal
retirement in 2009. The part of it that was left over has been used for this
project. I also profited from an allowance by the directorate Exact Sciences
of the Netherlands Organization for Scientific Research (EW-NWO) related
to my membership of its Board. The preparation of the manuscript for this
was also made possible by a further grant from EW-NWO, and from the
Netherlands Research School for Astronomy (NOVA).
And finally, I thank my wife Corry for her love, understanding and
support, with which she made it possible for me to write this book.