PERSONEN FILTERS: pagina=4, s=, field=physics, berichten=
Gevonden personen:
Member Group(s)
- Genootschaps-lid

Variant Names
N/ABIO
Dissertation: N/AHighest degree: doctor
Fields of interest:
Biography:
N/A
Residence
N/AOccupation
- assistant at Ministry of Finance 
- essayeur-generaal en voorziter van s Rijks Munt 
- Minister of Finance 1854 - 1858
- president-directeur der Maatschappij tot exploitatie van Staatsspoorwegen 1861 - 1868
- curator  - Hogeschool Leiden
Education
- student  - Athenaeum Illustre te Amsterdam
- mathematics and physics student  - 1836 - Hogeschool Utrecht
Membership
- Nederlandsche Maatschappij voor Nijverheid en Handel
chairman  - Gezelschap ter Beoeffening der proefondervindelijke Wijsbegeerte in ’s Hage
member, chairman (1859-1882) and honorary member (>1882) 1858 - 1890~
Provenance
- Molhuysen, P.C., en P.J. Blok (redactie), Nieuw Nederlandsch Biografisch Woordenboek. Deel 3. (Leiden 1914) 1366.
Publications
N/AWiki and VIAF
Wiki Data: N/AVIAF: N/A
Member Group(s)
- Genootschaps-lid

Variant Names
N/ABIO
Dissertation: N/AHighest degree: mr.
Fields of interest:
Biography:
N/A
Residence
- Leiden 1803~ - [..1809]
- Amsterdam 1809~ - 1814~
Occupation
N/AEducation
N/AMembership
- Gezelschap ter Beoeffening der proefondervindelijke Wijsbegeerte in ’s Hage
member (physics department) and extraordinary honorary member (~1800) 1793 - 1824~
Provenance
- Naamen der leden van het Gezelschap, ter beoeffening der proefondervindelijke natuurkunde (Den Haag 1795).
- Naamen der leden van het Gezelschap, ter beoeffening der proefondervindelijke wysbegeerte (Den Haag 1800).
- Naamen der leden van het Gezelschap, ter beoeffening der proefondervindelijke wysbegeerte (Den Haag 1803).
- Naamlijst der leden van de Maatschappij voor natuur- en letterkunde (Den Haag 1809).
- Naamlijst der leden van de Maatschappij voor natuur- en letterkunde (Den Haag 1814).
- Naamlijst der leden van de Maatschappij voor natuur- en letterkunde (Den Haag 1824).
Publications
N/AWiki and VIAF
Wiki Data: N/AVIAF: N/A
Member Group(s)
- Genootschaps-lid

Variant Names
N/ABIO
Dissertation: Over de epiphysis cerebri der Plagiosbomi, Ganoideï en TeleosteïHighest degree: doctor
Fields of interest:
Biography:
N/A
Residence
N/AOccupation
- teacher in botany and zoology at the HBS 1872, Arnhem
- director 1895 - Rijks Tuinbouwschool, Wageningen
Education
- student mathematics and physics 1869 - 1872 - Universiteit Leiden
Membership
- Nederlands Natuur- en Geneeskundig Congres
member [..1890]
Provenance
- Molhuysen, P.C., P.J. Blok en L. Knappert (redactie), Nieuw Nederlandsch Biografisch Woordenboek. Deel 5. (Leiden 1921) 107.
- Ledenlijst Vereeniging het Nederl. Natuur- en Geneesk. Congres (1890).
Publications
N/AWiki and VIAF
Wiki Data: N/AVIAF: N/A
Member Group(s)
- KNAW-Lid

Variant Names
- Radelaar, Sieb
BIO
Dissertation: Kinetics of short-range order in some noble metal alloys (Delft, 1963)Highest degree: PhD
Fields of interest:
Biography:
N/A
Residence
N/AOccupation
N/AEducation
- student of engineering physics  - 1963-10 - Technische Hogeschool Delft, Delft
Membership
- Koninklijke Nederlandsche Akademie van Wetenschappen
Member Afd. Natuurkunde 25-07-1987 - 2017
Provenance
- De leden van de Koninklijke Nederlandse Akademie van Wetenschappen. Een demografisch perspectief: 1808 tot 2008. Amsterdam, Koninklijke Nederlandse 2008. Kaa, D.J. van de, Roo, Y. de
- Levensberichten en herdenkingen 2017, Amsterdam 2017, J.Th.M. de Hosson, p. 86-99
Publications
N/AMember Group(s)
- KNAW-Lid

Variant Names
N/ABIO
Dissertation: N/AHighest degree: N/A
Fields of interest:
Biography:
N/A
Residence
- Bandung 
Occupation
N/AEducation
N/AMembership
- Koninklijke Nederlandsche Akademie van Wetenschappen
Correspondent Afdeling Natuurkunde / (resigned) 18-05-1928 - 01-10-1929 - Koninklijke Nederlandsche Akademie van Wetenschappen
Member Afd. Natuurkunde 15-05-1936
Provenance
- Clay, J., Verslagen Natuurkunde 64, 1955, p. 61-63 door M.W. Woerdeman; Jaarboek 1955/56, p. 209-212 door G.W. Rathenau.
Publications
-
The energy In showers and impacts in cosmic radiation, p. 365 Year: . Pages: 1. (PDF format)
-
Electric phenomena in the atmosphere Year: . Pages: 5. (PDF format)
-
On the influence of electric waves upon platimum mirrors (Coherer action) Year: . Pages: 4. (PDF format)
-
De energie en het doordringend vermogen van de kosmische stralen Year: . Pages: 11. (PDF format)
-
Cosmic Ray Showers Year: . Pages: 9. (PDF format)
-
Penetrating Radiation Year: . Pages: 13. (PDF format)
-
The earthmagnetic effect and the corpuscular nature of (Cosmic) Ultra-radiation. IV Year: . Pages: 9. (PDF format)
-
The cosmic corpuscular ultra-radiation. V. Ionisation in the Stratosphere and in the highest layers Year: . Pages: 9. (PDF format)
-
Le complexe des rayons cosmiques, p. 407 Year: . Pages: 1. (PDF format)
-
L'énergie dans les grandes gerbes et les chocs dans la radiation cosmique, p. 365 Year: . Pages: 2. (PDF format)
Member Group(s)
- KNAW-Lid

Variant Names
- Sklodowska, Marie
- Skłodowska, Maria Salomea
BIO
Dissertation: N/AHighest degree: N/A
Fields of interest:
Biography:
N/A
Residence
- Paris 
Occupation
N/AEducation
N/AMembership
- Koninklijke Nederlandsche Akademie van Wetenschappen
Foreign Member Afd. Natuurkunde 21-05-1913
Provenance
- Curie, M.S., Proceedings 37, 1934, p. 470 door J. van der Hoeve.
Publications
N/AMember Group(s)
- KNAW-Lid

Residence
- Baltimore 
Occupation
N/AEducation
N/AMembership
- Koninklijke Nederlandsche Akademie van Wetenschappen
Correspondent Afdeling Natuurkunde 12-05-1952
Provenance
- Dieke, G.H., Jaarboek 1965/66, p. 378-379 door R. Kronig.
Publications
Member Group(s)
- KNAW-Lid

Residence
- Stockholm 
Occupation
N/AEducation
N/AMembership
- Koninklijke Nederlandsche Akademie van Wetenschappen
Foreign Member Afd. Natuurkunde 16-05-1919
Provenance
- Arrhenius, Sv., Verslagen Natuurkunde 36, 1927, p. 940 door F.A.F.C. Went.
Publications
N/AMember Group(s)
- Genootschaps-lid

Variant Names
N/ABIO
Dissertation: N/AHighest degree: Dr.
Fields of interest:
Biography:
Chemistry teacher at HBS Delft
Residence
N/AOccupation
- chemistry teacher  - Hoogere Burgerschool - Delft
Education
N/AMembership
- Nederlands Natuur- en Geneeskundig Congres
member [..1890]
Provenance
- https://www.genealogieonline.nl/genealogie-baert-cornelis-kalshoven/I11438.php
- Ledenlijst Vereeniging het Nederl. Natuur- en Geneesk. Congres (1890).
Publications
N/AWiki and VIAF
Wiki Data: N/AVIAF: N/A
Member Group(s)
- Genootschaps-lid

Variant Names
N/ABIO
Dissertation: N/AHighest degree: Ir.
Fields of interest:
Biography:
N/A
Residence
- Gorinchem 1895 - 1900
- Rotterdam 1900 - 1943
Occupation
N/AEducation
N/AMembership
- Nederlands Natuur- en Geneeskundig Congres
member [..1890]
Provenance
- "Ir. F.J. VAES.". "De banier : staatkundig gereformeerd dagblad". Rotterdam, 11-07-1932. Geraadpleegd op Delpher op 18-05-2016, http://resolver.kb.nl/resolve?urn=ddd:010855002:mpeg21:a0037
- "IR. F. J. VAES GAAT HET ONDERWIJS VERLATEN.". "De Telegraaf". Amsterdam, 08-07-1932. Geraadpleegd op Delpher op 18-05-2016, http://resolver.kb.nl/resolve?urn=ddd:110569830:mpeg21:a0261
- http://rjb.x-cago.com/GARJB/1926/12/19261231/GARJB-19261231-0015/story.pdf
- "AGENDA VAN GEBOORTEDAGEN. 15 Juli.". "Rotterdamsch nieuwsblad". Rotterdam, 13-07-1940. Geraadpleegd op Delpher op 18-05-2016, http://resolver.kb.nl/resolve?urn=ddd:011002438:mpeg21:a0200
- "Familiebericht". "Rotterdamsch nieuwsblad". Rotterdam, 12-11-1943. Geraadpleegd op Delpher op 18-05-2016, http://resolver.kb.nl/resolve?urn=ddd:011003352:mpeg21:a0044
- "ONDERWIJS.". "Algemeen Handelsblad". Amsterdam, 24-02-1895. Geraadpleegd op Delpher op 18-05-2016, http://resolver.kb.nl/resolve?urn=ddd:010104856:mpeg21:a0128
- "STADSNIEUWS". "Dagblad van Rotterdam". Rotterdam, 10-11-1943. Geraadpleegd op Delpher op 18-05-2016, http://resolver.kb.nl/resolve?urn=ddd:010312360:mpeg21:a0041
- Ledenlijst Vereeniging het Nederl. Natuur- en Geneesk. Congres (1890).
Publications
N/AWiki and VIAF
Wiki Data: N/AVIAF: N/A
Member Group(s)
- KNAW-Lid

Residence
- München 
Occupation
N/AEducation
N/AMembership
- Koninklijke Nederlandsche Akademie van Wetenschappen
Foreign Member Afd. Natuurkunde 13-05-1939
Provenance
- Heisenberg, W., Jaarboek 1975, p. 210-212 door S.R. de Groot; Verslagen Natuurkunde 85, 1976, p. 14 door J. de Boer.
Publications
N/AMember Group(s)
- Boerhaave (instrumentenmakers)
- KNAW-Lid

Variant Names
N/ABIO
Dissertation: N/AHighest degree: N/A
Fields of interest:
Biography:
Holst attended the HBS in Haarlem and, after receiving his diploma in 1903, worked in industry for two years. In 1905 he enrolled at the Eidgenössische Technische Hochschule (ETH) in Zurich to study mechanical engineering, switching to mathematics and physics the following year, he received his diploma of Geprüfter Fachlehrer in 1908 and remained at the ETH as assistant to H.F. Weber until 1910. In that year, he became an assistant of Kamerlingh Onnes at the Leiden Physics laboratory. Here Holst made the first measurements of the electrical resistance of metals at liquid-Helium temperatures and was thus intimately involved in the discovery of superconductivity. For his dissertation, Holst made measurements of the thermal properties of ammonia and methyl chloride, and for this work he received his doctorate from the ETH in 1914.
Having finished his education, Holst joined the Philips Gloeilampenfabriek in Eindhoven, where he founded the Physics laboratory, which quickly became the most important industrial research laboratory in the Netherlands. He published a series of articles on measurements of illumination, the properties of Tungsten, and gas discharges. More importantly, Holst surrounded himself with capable associates (e.g., H.B.G. Casimir), whom he led and inspired, and he had a keen sense of which scientific results were ready for practical application. The laboratory's studies of gas discharges, for instance, were inspired by Bohr's atomic theory, important studies were performed under Holst's direction on radio tubes, X-Ray tubes, and photocells. Holst's early ideas about radio as a means of communication were controversial, but he was strongly supported by the company's owner, Anton Philips. By the mid-1930s, Holst had put together a research group on the electrical and magnetic properties of solids to investigate the possibilities opened up by quantum theory. From 1929 to 1939, Holst served as honorary professor at Leiden.
Personally reserved, Holst was not a good public speaker or talented writer: his talent lay in inspiring others. He made sure that his staff maintained contacts with the foremost researchers in scientific fields, and encouraged them to publish in scientific journals and attend scientific conferences. Although Holst suffered increasingly from depression, he carried on at the Philips laboratory until 1946, when he retired, retaining his connection with Philips as an adviser until 1956. From 1946 to 1956 he also served as 'curator' (governor) of the Technical College in Delft. He was instrumental in the founding of the Netherlands' second technical college in Eindhoven in 1957.
Residence
- Waalre 
Occupation
N/AEducation
N/AMembership
- Koninklijke Nederlandsche Akademie van Wetenschappen
Member Afd. Natuurkunde 18-05-1926
Provenance
- Gaillard, P.J., ‘G. Holst’, Verslagen Natuurkunde 77 (1968), p. 122.
- Van Helden, Albert, 'Gilles Holst', in: History of Science and Scholarship in the Netherlands, (1999) 471-472.
- Casimir, H.B.G., Jaarboek KNAW (1968/69),p. 225-230.
Publications
-
On the measurement of very low temperatures. XXVI. The vapour-pressures of oxygen and nitrogen according to the pressure-measurements by v. Siemens and the temperature-determinations by Kamerlingh Onnes c.s Year: . Pages: 12. (PDF format)
-
On the equation of state of water and of ammonia Year: . Pages: 7. (PDF format)
-
Sparks in air of atmospheric pressure Year: . Pages: 2. (PDF format)
Thomas Horsfield
MALEBethlehem (PA), United States 12-05-1773 - † London, United Kingdom 24-07-1859
Member Group(s)
- Genootschaps-lid
- KNAW-Lid

Variant Names
N/ABIO
Dissertation: N/AHighest degree: doctorate medicine (1798)
Fields of interest:
Biography:
He was a physician and naturalist who worked extensively in Indonesia, describing numerous species of plants and animals from the region. He was later a curator of the East India Company Museum in London. On the membership list of Bataviaasch Genootschap der Kunsten en Wetenschappen he is called 'Medical Doctor".
In 1802, he was appointed "opperchirurgijn in gouvernementsdienst" with as a task to do research in indigenous spices and plants.
Residence
- London 
Occupation
- Medical Doctor 
Education
N/AMembership
- Koninklijke Nederlandsche Akademie van Wetenschappen
Foreign Member Afd. Natuurkunde 26-10-1851 - Koninklijk Instituut, eerste klasse
Correspondent, living abroad 11-10-1838 - 26-10-1851 - Bataviaasch Genootschap van kunsten en wetenschappen - BataviaBatavia
Member 1802 - [1814..
Provenance
- Short account of the medicinal plants of Java (Batavia 1816).
- Verhandelingen van het Bataviaasch Genootschap (1814).
- Over de rivier van Solo in een' brief aan de dirigerende leden van het Bataviasche Genootschap (Batavia 1814).
- Essay on the geography, mineralogy and botany of the western portion of the territory of the native princes of Java (Batavia 1816).
- J.P.M. Groot, Van de Grote Rivier naar het Koningsplein (2006).
Publications
N/AMember Group(s)
- Boerhaave (instrumentenmakers)

Variant Names
- Huijgens, Christiaan
- Huygens heer van Zuylichem, Christiaan
- Hugenio, Christiano
- Hugens de Zulichem, Christian
- Huggens de Zulichem, Christianus
- Huygens de Zulechem, Chrestian
- Huggens de Zulikem, Christiaan
- Hugenius Zulichemius, Christian
- Hugens de Zulcon, Christiaan
- Archimedes
BIO
Dissertation: N/AHighest degree: N/A
Fields of interest:
Biography:
Born in 1629, Huygens was the son of the poet and diplomat, Constantijn Huygens. He studied law in Leiden and Breda. He was interested mainly in mathematics and proved to be very talented early in life. With his brother Constantijn Jr., he ground lenses and made astronomical observations. He also developed a very accurate pendulum clock and established a wave-theory of light. His discoveries attracted attention abroad, and, in 1666, he was asked to lead the newly founded Académie des Sciences in Paris. After a few years absence caused by illness, he resigned from the Académie. Later in life he wrote a book on cosmolog, called 'Cosmotheoros'.
Inventor of the pendulum clock ("slingeruurwerk") and the aerial telescope. Designer of the Huygens ocular. Huygens discovered the moon of Saturn (Titan) and explained that a ring was present around this planet. He also established the wave-theory of light.
Collections: Museum Boerhaave Leiden, Universiteitsmuseum Utrecht, Noordelijk Scheepvaart Museum Groningen.
Residence
- Den Haag 1629 - 1645
- Leiden 1645-05-12
- Breda 1647
- Paris 1660-10-12
- London 1661-03-19
- Den Haag 1661-05-27
- Paris 1633-04-03
- London 1663-06-07
- Paris 1663-10-01 - 1663-06-07
- Den Haag 1664-06-07
- Den Haag 1648-05~
- Spa 1654-08 - 1654-08~
- Paris 1655-07~ - 1655-11-26~
- Paris 1666 - 1681
- Den Haag 1681 - 1695
Occupation
- Instrument maker 
Education
- Law student 12-05-1645 - Universiteit Leiden
- Student at Breda 1646~ - 1648~ - Collegium Arausiacum - Breda
Membership
- Académie de Montmor
Attendant  - Académie Royale des Sciences
Member 1665 - Royal Society of London
Member 22-06-1663 - Académie de Thévenot
Attendant 
Provenance
- Biografisch Woordenboek van Nederlandse Wiskundigen. http://www.bwnw.nl/
- Theoremata de quadratura hyperboles, ellipsis et circuli (1651)
- De Saturni Luna observatio nova (1656)
- Systema saturnium (1659)
- Horologium oscillatorium sive de motu pendularium (1673)
- Memoriën aengaende het slijpen van glasen tot verrekijckers (1685)
- Traité de la lumière (1690)
- Cosmotheoros (1698)
- Riekher, R. Fernrohre und ihre Meister: eine Entwicklungsgeschichte der Fernrohrtechnik (Berlin 1957).
- Ahlström, O. Synverktyg fran äldre tider (Stockholm 1943).
- Jorink, E. Reading the book of nature in the Dutch golden age, 1575-1715 (Leiden/Boston 2010).
- Doorman, G. Octrooien voor uitvindingen in de Nederlanden uit de 16e-18e eeuw : met bespreking van enkele onderwerpen uit de geschiedenis der techniek (Den Haag 1940).
- Zinner, E. Deutsche und Niederländische astronomische Instrumente des 11.-18. Jahrhunderts (München 1956).
- Forbes, R.J. Cultuurgeschiedenis van wetenschap en techniek ('s Gravenhage 1966).
- Nijland, A.A. Christiaan Huygens, in het bijzonder als astronoom (Groningen 1929).
- Crommelin, C.A. Christiaan Huygens (Gent 1938).
- Icke, V. De ruimte van Christiaan Huygens (Groningen 2009).
- Daumas, M. Scientific instruments of the seventeenth and eighteenth centuries and their makers (London 1972).
- Harting, P. ' De tien-voets kijker van Christiaan Huygens', in: Album der Natuur (1867).
- Michel, H. Instruments des sciences dans l'art et l'histoire (Rhode-St-Genèse 1965).
Publications
N/AMember Group(s)
- Genootschaps-lid

Variant Names
N/ABIO
Dissertation: De animis sub altari (1748) and De mundi mechanismo (1752)Highest degree: doctorate arts and philosophy (1752)
Fields of interest:
Biography:
The membership of Van Iperen (with his various publications and connections in the Netherlands) of the "Bataviaasch Genootschap" was heavily encouraged. A second secretary place in the board was created for him. He was minister in Lillo, Veere and Batavia and he was active in several learned societies.
Residence
- Lillo 
- Veere 
- Batavia 
Occupation
- member  - Commissie voor de verbetering van de psalmberijming
- minister 1750, Lillo
- minister 1766, Veere
- minister 1779 - 1780, Batavia
- A.L.M. Philos. Doct. 
Education
- student 1744, Groningen
- student 1747 - 1748, Leiden
Membership
- (Koninklijk) Zeeuwsch Genootschap der Wetenschappen
Member 1768 - 1780 - Hollandsche Maatschappij der Wetenschappen - Haarlem
Member 1765 - 1780 - Letterkundig genootschap onder de zinspreuk ‘Kunstliefde Spaart Geen Vlijt’
Extra ordinary honorary member 1773 - 1780 - Maatschappij der Nederlandsche Letterkunde - Leiden
Member 1773 - 1780 - Bataviaasch Genootschap van kunsten en wetenschappen - BataviaBatavia
Dirigeerend Lid and Secretary 1779~ - 1780
Publications
N/AMember Group(s)
- KNAW-Lid

Residence
- Antony 
Occupation
N/AEducation
N/AMembership
- Koninklijke Nederlandsche Akademie van Wetenschappen
Foreign Member Afd. Natuurkunde 12-06-1946
Provenance
- Joliot, F., Verslagen Natuurkunde 67, 1958, p. 101 door M.W. Woerdeman.
Publications
N/AMember Group(s)
- KNAW-Lid

Residence
- Paris 
Occupation
N/AEducation
N/AMembership
- Koninklijk Instituut, eerste klasse
Correspondent, living abroad 29-09-1836 - 26-10-1851 - Koninklijke Nederlandsche Akademie van Wetenschappen
Foreign Member Afd. Natuurkunde 26-10-1851
Provenance
- Ledenlijst in: De leden van de Koninklijke Nederlandse Akademie van Wetenschappen. Een demografisch perspectief: 1808 tot 2008. Kaa, D.J. vam de, Roo, Y. de. KNAW Press (2008)
Publications
N/AMember Group(s)
- Genootschaps-lid
- KNAW-Lid

Variant Names
N/ABIO
Dissertation: De leer der quaternions in hare toepassing op de leer van den circulairen hodograafHighest degree: doctor
Fields of interest:
Biography:
N/A
Residence
- Utrecht 
Occupation
- Teacher  - Hoogere Burgerschool - Roermond
- teacher  - Hoogere Burgerschool - Delft
- teacher  - Koninklijke Militaire Academie, Breda
- Professor of physics  - Universiteit Utrecht, Utrecht
Education
- student 1853~ - Gymnasium Utrecht
- student 1867 - 1873, Utrecht
Membership
- Koninklijke Nederlandsche Akademie van Wetenschappen
Member Afd. Natuurkunde 11-05-1897 - Nederlands Natuur- en Geneeskundig Congres
member [..1890]
Provenance
- Julius, V.A., Verslagen Natuurkunde 11, 1902/03, p. 3-5 door H.G. van de Sande Bakhuyzen.
- Ledenlijst Vereeniging het Nederl. Natuur- en Geneesk. Congres (1890).
Publications
N/AMember Group(s)
- KNAW-Lid

Variant Names
- Kapica, Petr Leonidovič
BIO
Dissertation: N/AHighest degree: N/A
Fields of interest:
Biography:
N/A
Residence
- Moscow 
Occupation
N/AEducation
N/AMembership
- Koninklijke Nederlandsche Akademie van Wetenschappen
Foreign Member Afd. Natuurkunde 15-07-1969
Provenance
- Kapitza, P.L., Jaarboek 1985, p. 187-189 door H.B.G. Casimir.
Publications
N/AMember Group(s)
- KNAW-Lid

Variant Names
- Keesom, Willem
- Keesom, Wilhelmus Hendrikus
BIO
Dissertation: N/AHighest degree: N/A
Fields of interest:
Biography:
Keesom was born on a farm in the southern part of the island of Texel into a devoutly Catholic family with no tradition of learning. He attended elementary school in Den Burgh, Texel, and, starting in 1889, the HBS in Alkmaar. In 1894 he matriculated at the university of Amsterdam, where he took his doctorate in 1904 (with honors) under Van der Waals, on a dissertation entitled Isothermen van mengsels van zuurstof en koolzuur (an elaboration of the 1903 gold-prize winning answer to a prize question issued by the Leiden faculty of Mathematics and Physics).
In 1900, Keesom had become an assistant to Kamerlingh Onnes at the Physics Laboratory at the university of Leiden. In 1904 he married Anna Maria Aleida Moorman, and the couple had two sons and six daughters. Although Keesom was promoted to conservator in 1909, his salary was not sufficient to provide for his rapidly growing family, and he therefore taught part-time at several secondary schools and gave lecture courses at the University of Utrecht. During this first Leiden period, Keesom published about 40 papers, a number of which were co-authored with Kamerlingh Onnes, who relied heavily on Keesom's theoretical abilities, especially in studies leading up to the liquefaction of helium in 1908. In his Nobel Lecture, Kamerlingh Onnes wrote: 'Den hervorragenden theoretischen Kenntnissen von Herm Keesom verdanke ich weiter viel wegender gründlichen und einsichtsvollen Weise, in welcher er die mit der Zustandgleichung zusammenhängenden theoretischen Fragen deren gleichzeitiges Stadium ihm vorwiegend zu Teil fiel, bearbeitet habe'.
Although by this time Keesom had established himself at home as well as abroad as a brilliant theoretical physicist, upon the retirement of Lorentz he was passed over for the chair of theoretical physics, which was awarded to Paul Ehrenfest. He was passed over as well for several other chairs, and there is little doubt that his Catholicism was the cause. In 1917 he accepted an appointment at the National Veterinary School at Utrecht, and when that school achieved university-level status, the following year, Keesom became professor of physics. He finally returned to the university of Leiden in 1923, when upon the death of Kuenen he was appointed to the chair of physics. The following year, upon the retirement of Kamerlingh Onnes, Keesom became co-director of thephysics laboratorium with De Haas. Over the next two decades, he produced over 200 scientific papers with a number of co-workers. He used increased pressure to solidify helium and by 1932 had cooled helium to 0.7° K. In 1927 he discovered with M. Wolfke, that there is a change in the form of liquid helium at 2.19 °K, and in 1936, with his daughter P. Keesom, he discovered the then called 'warm superconductivity' (superfluidity) of one of these. he investigated the caloric properties of superconducting metals and the structure and properties of liquid and solid helium, neon, hydrogen, nitrogen, oxygen, etc. In 1940, work at the laboratory ground to a halt. Keesom retired in 1945 for health reasons.
Keesom was active in the profession. He was chairman of the Institut International du Froid, chaired the 1936 Cold Congress in The Hague, and served as president of the Nederlandsche Vereeniging voor Koeltechniek for many years. Because up to World War II his laboratory was the leading site for cryogenic research in the world, many foreign scientists came to work there. Keesom gave his weekly seminars in German or English when necessary.
Keesom remained a devout Catholic his entire life, even though in the first decades of this century this was definitely not a help for one trying to make a career in science. Shortly after the turn of the century, he became active in the Vereeniging tot het Bevorderen van de Beoefening van de Wetenschap onder de Katholieken in Nederland (Society for the Promotion of the Practice of Science among Catholics in the Netherlands) and personally encouraged Catholics to pursue a career in science. 1936 Keesom was among the first group of appointees in the new Pontifical Academy of Exact Sciences.
He died in Leiden on 3 March 1956. He was survived by his second wife, Seraphina Josephina Francisca Maria Gieliam, whom he had married in 1927, four years after the death of his first wife.
Residence
- Leiden 
Occupation
N/AEducation
N/AMembership
- Koninklijke Nederlandsche Akademie van Wetenschappen
Member Afd. Natuurkunde 28-05-1924
Provenance
- Keesom, W.H., Verslagen Natuurkunde 65, 1956, p. 27-28 door M.W. Woerdeman; Jaarboek 1956/57, p. 225-230 door C.J. Gorter.
- Biografie opgenomen in History of Science and Scholarship in the Netherlands
Publications
-
The second viral coefficient for rigid spherical molecules, whose mutual attraction is equivalent to that of a quadruplet placed at their centre Year: . Pages: 12. (PDF format)
-
On the second virial coefficient for di-atomic gases Year: . Pages: 16. (PDF format)
-
On the theory of free electrons in metals Year: . Pages: 11. (PDF format)
-
Contributions to the knowledge of Van der Waal's psi-surface VI. The increase of pressure at condensation of a substance with small admixtures Year: . Pages: 11. (PDF format)
-
The cohesion forces in the theory of VAN DER WAALS Year: . Pages: 4. (PDF format)
-
On the diffraction of Röntgen-rays in fused sodium and potassium Year: . Pages: 3. (PDF format)
-
On the magnetization of ferromagnetic substances considered in connection with the assumption of a zero-point energy Year: . Pages: 15. (PDF format)
-
On the magnetization of ferromagnetic substances considered in connection with the assumption of a zero-point energy. II. On the susceptibility in the excited ferromagnetic state Year: . Pages: 10. (PDF format)
-
On the manner in which the susceptibility of paramagnetic substances depends on the density Year: . Pages: 14. (PDF format)
-
On the question whether at the absolute zero entropy changes on mixing Year: . Pages: 6. (PDF format)