H.B.G. Casimir's life, interests and works are intertwined with the important developments that have taken place in physics during this century. This book was compiled by his friends and admirers in honour of his 80th birthday and concentrates mainly on Casimir's achievements in the field of physics, though without ignoring the peripheral areas of the history and philosophy of physics in which he was greatly interested. The book is divided into four parts. Part I describes Casimir's teachers, Ehrenfest, Bohr and (...) Pauli, and will be of general interest due to the key role which these physicists played in modern developments. The articles do give new facts and provide new insights into the history of modern physics. Part II consists of essays on recent developments in various areas of physics in which Casimir has taken an active interest, such as the modern concept of time, statistical foundations of electrodynamic theory and field theory. The subjects covered in Part III have been selected because of Casimir's efforts in the industrial research area of physics. They cover past, present and future expectations in research. (shrink)

Drawing on archival material in Utrecht and Rotterdam, we examine the geophysical surveys of Indonesia and Brazil carried out by Elie van Rijckevorsel during the period 1870 to 1890. We pay special attention to the complex interactions among university academics, government administrators and ministers of state, and private, ‘gentlemanly’ specialists. Making an appearance, in addition to Van Rijckevorsel, are the Utrecht polymath Christophorus Hendricus Diedericus Buys Ballot , the colonial and metropolitan astronomer Jean Abraham Chrétien Oudemans , colonial geophysicist (...) Pieter Adriaan Bergsma , French-Brazilian astronomer Emmanuel Liais , Colonial Minister Isaac Dignus Fransen van de Putte , and others. The decision of Van Rijckevorsel, an independently wealthy man of learning, to carry out a magnetic survey of the Malay archipelago spurred colonial authorities at The Hague to endow the finest geomagnetic observatory in the tropics. Van Rijckevorsel's interactions with academia and government suggest the extent to which wealthy Dutch patricians readily accepted government patronage for their scientific undertakings. A late-nineteenth-century Dutch ‘gentleman of science’ is seen to differ rather widely from his English counterpart of an earlier generation. An appendix reproduces, in English translation, correspondence from the early 1870s. (shrink)