Results 1 to 10 of about 2,208 (55)

Les vies successives du cercle méridien portatif de Rigaud n° 2

Cahiers François Viète, 2023
In the middle of the 19th century, the portable meridian telescope emerges to measure the position on earth or to determine the time. Doesn’t the mobility of the instrument permanently challenge the state of operational stability slowly obtained for the ...
Frédéric Soulu
doaj   +1 more source

Repsold Company as a Global Player: From the First Meridian Circle in 1802 to the Modern Computerized in 1967

Cahiers François Viète, 2023
The first modern meridian circle after Rømer’s Rota Meridiana (1704) was constructed by Johann Georg Repsold (1770-1830) in 1802, used in the first Hamburg observatory, restored for Göttingen, 1818. A new meridian circle, made by A. & G.
Gudrun Wolfschmidt
doaj   +1 more source

Élaborer le cercle méridien Ertel & Sohn de l’Observatoire de Neuchâtel (1858-1861) : besoins scientifiques, possibilités techniques et contraintes financières

Cahiers François Viète, 2023
When founding a new observatory, the choice of instrumentation is of great importance for its recognition in the international network of astronomical institutions.
Julien Gressot, Romain Jeanneret
doaj   +1 more source

The Reichenbach & Ertel Meridian Circle at the Tartu Old Observatory: Great Moments from the History of a 200 Years Old Instrument

Cahiers François Viète, 2023
This article examines major events in the 200-year history of the meridian circle of Tartu’s (Dorpat) Old Observatory based on archival sources and primary literature.
Lea Leppik
doaj   +1 more source

Améliorer les mesures méridiennes à l’Observatoire de Paris, un lent assemblage de précision

Cahiers François Viète, 2023
In 1863 a large meridian circle is installed at the Paris Observatory, a new equipment ordered from Secretan, completing the existing meridian instrumentation.
Loïc Jeanson, Jean Davoigneau
doaj   +1 more source

Le cercle méridien de Repsold de Strasbourg : analyse d’implantation au sein du nouvel observatoire de l’université impériale

Cahiers François Viète, 2023
Newly created by the German Empire in the recently annexed Alsatian capital, the Strasbourg astronomical observatory was equipped in 1880 with a Repsold meridian circle. Two characteristics define its installation.
Delphine Issenmann
doaj   +1 more source

Introduction - Re-Assembling the History of Meridian Circles

Cahiers François Viète, 2023
Meridian circles were tools of science, state and empire. Besides being used for astronomical observations, the by-products of observations made also had more utilitarian purposes applicable to commerce, transportation, industry and the expansion of ...
Daniel Belteki, Julien Gressot
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Cataloguer, rechercher des cartes. Le référencement géographique en question [PDF]

, 2014
International audienceKarten katalogisieren und recherchieren: Die geographische Referenzierung in Frage gestellt Dieser Aufsatz behandelt die Methoden zur Erfassung und Erschliessung der Daten geographischer Referenzen von Karten in Bibliothekskatalogen.
Arnaud, Jean-Luc
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Les principes de la restauration d’instruments scientifiques : le cas du cercle méridien Gautier de l’observatoire de Rio de Janeiro

In Situ, 2009
This article opens with some general remarks on the principles of restoring scientific instruments and on the presentation of the restoration policies of the Brazilian museum of astronomy (MAST).
Marcus Granato, Françoise Le Guet Tully   +1 more
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La frontière maritime du Québec dans le golfe du Saint-Laurent [PDF]

, 1993
Les compétences territoriales d'un Québec souverain s'étendraient, dans le golfe du Saint-Laurent, à des espaces maritimes — mer territoriale, zone contiguë, zone économique exclusive et plateau continental — dont les largeurs seraient mesurées à partir ...
Labrecque, Georges
core   +1 more source