Stockholm / Oxford / Bloemfontein / Amsterdam / Milan / Vienna / Hamburg / Johannesburg / Oppenheim / Bruxelles / Berlin / Cambridge / Cape Town / London / /
Company
University Library / Houte de Lange / Albert Einstein A.S. / Leiden Observatory / M. Hildebrand / Miscellanea Table / Delft Polytechnic / /
Continent
America / /
Country
Netherlands / South Africa / Germany / Congo / /
Event
Person Communication and Meetings / Person Travel / Reorganization / Business Partnership / /
Facility
Leiden University Library / Perkins Observatory / Harvard Observatory / UOJ Union Observatory / Huygens Institute / Lick Observatory / Observatory Archives / Amsterdam University / Lamont-Hussey Observatory / Leiden University / Royal Observatory / Yale Southern Station / Radcliffe Observatory / University Library / Union Observatory / Cape Observatory / Groningen University / /
IndustryTerm
instrument manufacturer / /
Movie
Cape of Good Hope / /
NaturalFeature
Indies / Mt. Wilson / Cape of Good Hope / E.H. Hills / Cape Observatory / /
Organization
Ministry for Education and Science / Groningen University / Huygens Institute / the Netherlands IAU International Astronomical Union IEB International Education Board / South African government / Astronomical Society of the Pacific / Leiden University / Harvard / Yale / Rockefeller Foundation / International Astronomical Union / Royal Astronomical Society / South African Ministry for the Interior / Amsterdam University / /
Person
Anton Pannekoek / Frank Schlesinger / W. Schermerhorn / A. Innes / Spencer Jones / Van Gent / C. Easton / Jan Oort / Bart J. Bok / Felix Klein (Göttingen) / A.O. Leuschner / Georges Lemaître / Edwin Hubble / Dirk Brouwer / George Ellery Hale / De Sitter / Correspondence / Ejnar Hertzsprung / R. Schorr / Gratton / Gerard P. Kuiper / Van Rhijn / Georges Lemaître (Louvain) / L. Okulicz / Frank W. Dyson / N.C. de Gijselaar / F.D. Kahn / H.A. Lorentz / C.H. Hins / Jan H. Oort / Frank Robbins / Paul Ehrenfest / Levi-Civita (Padua) / Willem / Carla Kahn / A.C.D. Crommelin / A. Sanders / Tullio Levi-Civita / Johannes Gutenberg-Universität / J.C. Kapteyn / Max von Laue / Van den Bos / H. Spencer Jones / Jan van der Bilt (Utrecht) / H.A. Kluyver / Arend Pietersma / Carl Sanders / P. Kremer / R.C. Tolman / David Gill / David Baneke / G.P. Kuiper / L. Courvoisier / Henriette Hertzsprung-Kapteyn / concerning Sanders’ financial situation / /
Position
journalist and amateur astronomer / mayor / President / astronomer / professor of astronomy / General / engineer / acting director / future Prime Minister / visiting professor / assistant / deputy director of the Observatory / director of the Observatory / assistant of J.C. Kapteyn / physicist / deputy director / director / correspondent / astronomer at UOJ / observer / /
Leiden Observatory Archives, Willem de Sitter papers (WdS) Inventory by David Baneke, 2009 Table of contents 1 4