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Chronology
Correspondents
Royal Observatory of Belgium
(1126)
Observatoire royal de Belgique
(539)
City of Brussels
(113)
Royal Academie of Science, Letters and Fine arts of Belgium
(7)
Royal Institute of Meteorology
(3)
Scientific instruments
(472)
Staff
(300)
Accounting (Invoices, Accounts, ...)
(228)
Building Observatory (construction & maintenance)
(198)
Meteorology
(122)
City of Brussels
(119)
About publications
(105)
Budget
(92)
General Administration (reports, regulations & inventories)
(92)
External publications
(90)
Foreign observatories
(78)
Dutch government (1815-1830)
(74)
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Royal Observatory of Belgium
(1126)
Observatoire royal de Belgique
(539)
Scientific instruments
(472)
Staff
(300)
Accounting (Invoices, Accounts, ...)
(228)
Building Observatory (construction & maintenance)
(198)
Meteorology
(122)
City of Brussels
(119)
City of Brussels
(113)
About publications
(105)
Budget
(92)
General Administration (reports, regulations & inventories)
(92)
External publications
(90)
Foreign observatories
(78)
Dutch government (1815-1830)
(74)
Meridian & time keeping
(69)
Study trips
(62)
Astronomy
(61)
Education
(60)
Royal Academy
(55)
Cartography (+ topography & Geodesy)
(52)
Museum of Brussels (i. e. physics cabinet)
(41)
Personal life, family & friends
(38)
Foreign scientists and learned Societies
(36)
Statistics (+ BMI)
(31)
Justice & law (+ insurance)
(29)
Dépôt de la Guerre (Topographical Dépôt)
(28)
Telegraphy
(26)
Physics of the globe
(25)
Publications of the Observatory
(23)
Belgian Navy
(21)
External performances (Commissions, committees, ...)
(21)
Homeland observatories
(20)
Library of the Observatory
(18)
High school of Brussels
(18)
Weights and Measures
(17)
Phenology (periodical phenomena : weather and nature)
(14)
Illustrations
(14)
Railways
(14)
Telescopes
(14)
Medicine
(11)
Belgian revolution
(9)
Museum of Industry
(9)
Mathematics
(7)
Miscellaneous
(7)
Military school
(7)
Royal Academie of Science, Letters and Fine arts of Belgium
(7)
Royal Library
(5)
Demography
(5)
Town planning
(4)
Public constructions works
(3)
Botanical garden Brussels
(3)
Royal Institute of Meteorology
(3)
Learned Societies in Belgium
(2)
To correct
(2)
Belgian government
(2)
Industry
(1)
Biographies
(1)
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