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See detailExpression complète et signification véritable de la nutation initiale: démonstration qui en résulte de la fluidité intérieure du globe: conséquences analytiques de celle-ci dans les formules de l'astronomie
Folie, François ULg

in Acta Mathematica (1892), 16(1), 365-384

Astronomers neglected for a long time the nutation resulting from the arbitrary constants that the integration introduces into the Earth's rotation equations. This eulerian nutation, or initial nutation ... [more ▼]

Astronomers neglected for a long time the nutation resulting from the arbitrary constants that the integration introduces into the Earth's rotation equations. This eulerian nutation, or initial nutation, entered in the practical domain and the scientists didn't worry any more about its diurnal nature, even going as far as disputing it. However, it is obvious that this feater is the simplest and the safest to determine the constants of this nutation. [less ▲]

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See detailDes préjugés en astronomie
Folie, François ULg

in Bulletins de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique (1892), 3e série, t. 24(12), 629-669

During his annual speech as the science section director of the Belgian Royal Academy, François Folie summarizes the works, discoveries and advances made by its members, especially in astronomy.

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See detailRevue annuelle de physiologie
Fredericq, Léon ULg

in Revue Générale des Sciences Pures et Appliquées (1892), (11), 577-587

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See detailSur l'hémocyanine
Fredericq, Léon ULg

in Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences (1892), CXV

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See detailHerzstosscurven und endocardiale Druckcurve des Hundes
Fredericq, Léon ULg

in Zentralblatt für Physiologie (1892)

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See detailUeber die Zeit der Oeffnung und Schliessung der Semilunarklappen
Fredericq, Léon ULg

in Zentralblatt für Physiologie (1892)

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See detailLa nouvelle heure officielle: instructions pour les observateurs
Folie, François ULg

in Annuaire de l'Observatoire Royal de Belgique (1892), 60

On 1st May 1892, Belgium has established the time change and imposed Greenwich one. The author explains the modifications resulting in various domains.

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See detailNouvelle recherche des termes du second ordre dans les formules de réduction des circompolaires en ascension droite et déclinaison
Folie, François ULg

in Bulletins de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique (1892), 3e série, t. 23(4), 356-368

The author gives a new proof of the Fabritius’ reduction formulae and exposes a new process of research of the second order terms. He considers by himself these terms resulting from the nutation, from the ... [more ▼]

The author gives a new proof of the Fabritius’ reduction formulae and exposes a new process of research of the second order terms. He considers by himself these terms resulting from the nutation, from the aberration and from the combination of these latter. [less ▲]

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See detailNouvelle recherche des termes du second ordre dans les formules de réduction des circumpolaires en ascension droite et déclinaison (seconde communication)
Folie, François ULg

in Bulletins de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique (1892), 3e série, t. 23(5), 461-471

The author gives a new proof of the Fabritius’ reduction formulae. He considers by himself these second order terms resulting from the nutation, from the annual aberration, from the nutation and ... [more ▼]

The author gives a new proof of the Fabritius’ reduction formulae. He considers by himself these second order terms resulting from the nutation, from the annual aberration, from the nutation and aberration combination, and from the systematic aberration. [less ▲]

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See detailSur la nutation initiale
Folie, François ULg

in Annuaire de l'Observatoire Royal de Belgique (1892), 59

After determining the in initial nutation constants as well as its period, the author decides to check again the importance of this fact, which proves that we can’t study the Earth motion as if it was a ... [more ▼]

After determining the in initial nutation constants as well as its period, the author decides to check again the importance of this fact, which proves that we can’t study the Earth motion as if it was a solid spheroid. [less ▲]

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See detailSur un phénomène d'optique atmosphérique observé dans les Alpes
Folie, François ULg

in Bulletins de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique (1892), 3e série, t. 24(9-10), 263-267

The author tells an excursion made in Switzerland and tries to explain various optical phenomena perceived in the Alps.

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See detailUn corollaire inédit des lois de Kepler
Folie, François ULg

in Bulletins de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique (1892), 3e série, t. 24(12), 542-543

The law discovered by the meteorologist D. Dewar, and relative to the report of the average speeds of planets between them, is a corollary of Kepler's laws. The author uses it for elliptic orbits by ... [more ▼]

The law discovered by the meteorologist D. Dewar, and relative to the report of the average speeds of planets between them, is a corollary of Kepler's laws. The author uses it for elliptic orbits by stopping at the second eccentricity’s power. [less ▲]

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See detailPremière détermination de la différence de longitude entre les Observatoires de Bruxelles et d'Uccle
Folie, François ULg

in Annuaire de l'Observatoire Royal de Belgique (1892), 59

The author acknowledges the comments that took place at Brussels and Uccle Observatories concerning the longitude difference.

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See detailNote sur le diamètre du Soleil et de la Lune et l'équation personnelle dans les observations de passage par P. Stroobant: rapport de F. Folie
Folie, François ULg

in Bulletins de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique (1892), 3e série, t. 23(4), 341-342

The author establishes a report on a P.Stroobant’s work on the Sun and Moon diameters and the personal equation in the passage observations.

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See detailRéponse à la note de M. Tisserand
Folie, François ULg

in Bulletins de l'Académie Royale des Sciences, des Lettres et des Beaux-Arts de Belgique (1892), 3e série, t. 23(2), 84-88

The author answers to a Mr. Tisserand’s note about the Laplace’s expression on the apparent variations of the pole height, due to the initial nutation.

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See detailOn the formulae of reduction to apparent places of close Polar stars
Folie, François ULg

in Monthly Notices of the Royal Astronomical Society (1892), 52

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