Janssen pierre jules (7 risultati)

Soft cover. Condizione: Very Good. JANSSEN, Pierre Jules Cesar. "Rapport a l'Academie sur la mission en Oceanie [Caroline Islands], pour l'observation de l'eclipse totale de Soleil du 6 mai 1883" in Comptes Rendus de l'Academie des Sciences, Paris, Gauthier-Villar, 3 September 1883, vol 97 no. 10. This is the full weekly issue, extracted from a larger bound volume. Very crisp and bright copy! This is a very long report for the CRS, covering pp 586-603 in the issue of pp 585-618. …

soft cover. Condizione: fine. first edition. In-4° broché, paginé 901-996 - Compte rendus des séances de l'Académie des Sciences. Signalons aussi DUCLAUX : Digestion des matières grasses et cellulosiques présentée par Louis Pasteur.

Couverture rigide. Condizione: Bon. , 1860-1887, , , tirés à part, la plupart sans couverture, Ensemble exceptionnel proposant exclusivement en tirés à part les travaux les plus importants de Jules Janssen (1824-1907), l'un des principaux acteurs du vaste mouvement d'émancipation de la photographie à la fin du XIXe siècle, et inventeur du premier exemple de chronophotographie, décrit par les frères Lumières comme l'ancêtre de leur Cinématographe. Ensemble contenant notamment l'article proposant la première description de son revolver photographique, et de ses premiers résultats, qui sont sans aucun doute le premier « film cinématographique » (Singer, A History of Technology V, p. 739) : Présentation de quelques spécimens de photographies solaires obtenues avec un appareil construit pour la mission du Japon. [suivi de ] Présentation d'un spécimen de photographies d'un passage artificiel de Vénus, obtenu avec le revolver photographique. Paris, Gauthier-Villars, [1874] ). "These small strips of photographic paper marked the foundation of a new art and a new industry" (Singer, p. 741). Est présent également dans cet ensemble unique, le rarissime tiré à part, extrait de l'Annuaire du Bureau des Longitudes pour l'an 1876 de la Mission du Japon pour l'observation du passage de Vénus, offrant la fameuse planche représentant le revolver photographique (quasiment inconnu jusqu'alors en tiré à part). De ses premiers travaux de spectroscopie, dont sa thèse, témoignant déjà de son intérêt grandissant et visionnaire pour la photographie, en passant par ses essentielles contributions à la physique céleste et notamment à ces travaux sur les protubérances solaires, présentant les premières photographies de la surface solaire, cette exceptionnelle collection présente un témoignage essentiel de l'oeuvre de ce scientifique brillant et foisonnant que fut Jules Janssen, qui publia plus de 350 articles entre 1859 et 1907 (DSB, p.77). Personnage iconoclaste de la science française, Jules Janssen fut également un homme de terrain, au goût marqué pour l'aventure, héritier des grands voyageurs et missionnaires scientifiques du XVIIe siècle, qui n'hésitaient pas à risquer leur vie dans des voyages incertains ; alors qu'il était affecté d'une claudication, il risqua à trois reprises l'ascension du Mont Blanc dans une "échelle à porteurs", afin d'installer au sommet un observatoire éphémère qui sera utilisé entre 1893 à 1909. ----- Liste détaillée des documents (ordre chronologique): - L'absorption de la chaleur rayonnante obscure dans les milieux de l'oeil. Paris, [1860]. Extrait des annales de Chimie et de physique, 3e Série, t. IX. In-8, 23-[1] pages. Tiré à part de la thèse de Jules Janssen. - Janssen et Eugène FOLIN. Considérations physiologiques sur l'éclairage et les applications à l'examen ophtalmoscopique. Paris, P. Asselin, 1861. In-8, 14-[2] pages. Première et unique édition de cet article, dans lequel on peut découvrir l'intérêt naissant de Janssen pour l'évolution des techniques photographiques, qu'il pratique déjà lui-même. Tiré à part, extrait des Archives générales de Médecine, numéro de juillet 1861. (Dans le champ des étoiles, p.24) - Sur le spectre de la vapeur d'eau. Paris, Gauthier-Villars, [1866]. In-8, 6-[2] pages. Tiré à part extrait des Comptes rendus de l'Académie des Sciences, dans lequel Il détermine le spectre de la vapeur d'eau et peut montrer que les raies telluriques sont dues à la vapeur d'eau répandue dans l'atmosphère terrestre. - Sur un voyage fait aux Açores et dans la péninsule Ibérique. Paris, Gauthier-Villars, [1867]. In-8, 2 pages. Tiré à part extrait des Comptes rendus de l'Académie des Sciences. - Janssen et Charles SAINTE-CLAIRE DEVILLE. Récit de l'éruption sous-marine qui a eu lieu, le 1er Juin 1867 entre les îles Terceira et Graciosa, aux Açores. Paris, Gauthier-Villars, 1867. In-8, 8 pages. Tiré à part extrait des Comptes.…

First edition. "THE PRECURSOR OF THE MOVIE CAMERA" - "THE FIRST 'FILM'" (SINGER). First edition, extremely rare offprint, of Janssen's epoch-making description of his 'photographic revolver' and of its first results, "the first 'film'" (Singer, A History of Technology V, p. 739). "The first practical device for sequential photography, invented to record the transit of Venus in 1874, was later recognized as the precursor of the movie camera . Janssen's 'revolver photographique'" (Launay & Hingley, p. 57). With this apparatus, the first to photograph successive phases of a single movement, Janssen "realized one of the operations necessary for cinematography" (DSB). Indeed, it was Janssen's invention of this device which spurred Étienne Jules Marey to use it (first in March 1882) to record the flight of birds, to which Janssen responded in 'Note sur le principe d'un nouveau révolver photographique,' 3 April 1882 (also included here). These papers of Janssen led to Marey's momentous experiments which resulted in the birth of cinematography, as presented by him to the Académie des Sciences on 29 October 1888. Janssen "was in the chair on this historic occasion . . . but few of the other members could have realised that these small strips of photographic paper marked the foundation of a new art and a new industry" (ibid., p. 741). "Janssen's photographic revolver was a genuine scientific cine camera in embryo. It had a motor, an optical system, a variable shutter, and sensitive material in movement. It did not yet allow for the dynamic reproduction of movement, but it did permit its analysis . This was an anticipation of so-called time-lapse cinematography, by which . it is possible to assess movements too slow to be appreciated by the human eye" (Tosi, p. 39). Janssen constructed his photographic revolver in order to record a transit of Venus across the Sun on 8 December, 1874, as observed in Japan (in the UK, the Astronomer Royal, Sir George Biddell Airy, had all of the British transit expeditions equipped with a 'Janssen'); these observations were important because the accuracy with which the moment of transit can be determined, as observed from different places, is directly related to the accuracy with which one can determine the distance of the Earth from the Sun. Janssen's great paper here constitutes one of a remarkable collection of 58 offprints of his works. Many of these deal with questions in astronomy and astrophysics, including papers describing a micrometer designed to measure solar images, on the passage of hypothetical bodies between Mercury and the Sun, sunspots, solar temperature, eclipses, and the application of photography to spectral analysis. One of these, 'Sur la constitution de la surface solaire et sur la Photographie envisagée comme moyen de découverte en Astronomie physique,' a visionary disquisition on the potential of photography in astronomy, has an actual photograph of the solar surface pasted onto the final page, an 'épreuve photoglyptique obtenue sans aucune intervention de la main humaine.' A non-astronomical paper is 'Sur le phonographe de M. Edison,' 23 April 1889, which Janssen encountered at the meeting of the British Association for the Advancement of Science in Bath, September 1888. All of these offprints are extremely rare. OCLC records copies at the Paris Museum of Natural History or Observatory, or not at all. In the eighteenth century, several expeditions had been mounted to observe the transits of Venus of 1761 and 1769, notably those led by Captain Cook. All these efforts were in vain, because the measurements of the times of contact, i.e., the moment at which Venus begins to cross the face of the Sun, were insufficiently accurate because of the infamous "black drop" effect, which made the limb of the planet appear to be linked to that of the Sun by a dark thread, making any accurate determination of contact impossible. By the time the next transits were due to take place, on 8/9 December 1874 and 6 De.…

Paris: Gauthier-Villars, 1873, 1874, 1874 a.1882. 4to. No wrappers. In: "Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences", Vol. 76, No 11, Vol. 78, No 25, Vol. 79, No 1, Vol. 94, No 14. (3 entire issues offered). Pp. (677-) 732, pp. (1721-) 1780, pp. (5-) 72 and pp. (901-) 996. Janssen's papers: pp. 677-679, pp. 1730-31, pp. 6-7 and pp. 909-911. (The main paper having the title-page to the volume (vol. 79), stamp to title-page). First printings of this series of epoch-making papers in which Janssen introduced the "PHOTOGRAPHIC REVOLVER" and its first successfull use leading to the "First Film" and hereby "realized one of the operations necessary for cinematography"(DSB).In the first papers he conceived the idea of a device of historical interest, the photographic revolver, the technique of short exposures, which is announced here. The third paper is the epoch-making paper in which he specifically describes the "revolver" and its results, the "first film". The fourth paper is his responce to Marey's famous expriments with the "revolver" recording the flight of birds."A long barreled canon-like automatic camera was invented in 1874 by an outstanding pioneer of modern astronomical photography, Jules Janssen. Janssen used the revolving plate technique and called his camera a 'pistol'. Janssen's method used the forerunner of a number of 'gun' cameras with a slowly revolving plate and shutter operated by clockwork. The photos were taken every 70 seconds along the margin of the negative and he used his pistol to record a 48 image sequence of the transit of Venus across the sun at an exposure rate of 1.5 seconds."In planning for the observation of the transit of Venus, which he was to observe in Japan on 9 Deembe 1874, Janssen decided to substitute for visual observation at the time of transit a series of photographs taken in rapid succession, which would permit him to measure the successive positions of the planet in relation to the solar limb. He ordered the construcion of an apparatus consisting of three circular disks with the same axis: the first, pierced by twelve slits, served as the shutter"the second contained a window" the photographic plate, which was circular, was fixed to the third. The first two disks turned with a synchronized movement, the shutter disk continuously and the other irregularly in the intervals of time in which the window was not swept by a slit. A series of separate images laid out on a circle was thus obtained on the plate. In a general manner the apparatus provided an analysis of a motion on the basis of the sequence of its elemental aspects. Here Janssen realized one of the operations necessary for cinematography, which was invented twenty years later, and which required, besides analysis, the synthesis of images." (DSB). …

Paris, G. Masson, 1878. 8vo. Contemp. hcalf, raised bands, gilt spine. Light wear along edges. Small stamps on verso of titlepage. In: "Annales de Chimie et de Physique", 4e Series - Tome 15. 512 pp. a. 3 folded engraved plates. (The entire volume offered). Janssen's memoir: pp. 414-426. First appearance of this milestone paper in chemistry, physics and astronomy, announcing the discovery of the helium lines in the spectrum of the sun. It was Lockyer in the same year that named it 'helium' for Helios, the Greek God of the Sun. Helium was not discovered on the earth before 1895 by William Ramsay, and it was Crookes who established its identity with the helium Janssen and Lockyer observed in the spectrum of the sun."He Janssen) met immortality by travelling to India in 1868 to study the total eclipse. It was then that he observed the helium line and forwarded the spectral data to ockyer. He also noted the size of the solar prominences. The day after the eclipse he attempted to take their spectra again and succeeded despite the absence of the obscuring moon. he then announced jubilantly that it was the day after the eclipse that was the real eclipse day for him. Lockyer also reported this method of studying prominences without an eclipse.Like Lockyer he lived to see his observation of the helium line vindicated by Ramsay's discovery of that element on earth."(Asimov)."This (the discovery of helium lines in the sun by Lockyer) was announced on the same day by the French astronomer Janssen, who was in India observing a total eclipse. As a result, the French government some ten years later struck a medallion showing the heads of both scientists.By that time, the two men had made a much more dramatic discovery at the same time, this time in cooperation. Janssen, studying the spectrum ofthe sun during the eclipse, had noted a fine line he did not recognize. he send a report on this to Lockyer, an acknowledges expert on solar spectra. Lockyer compared the reported position of the line with lines of known elements, concluding that it must belong to a yeat unknown element, possibly not even existing on the earth. He named the element, from the Greek word for the sun."(Asimov).Parkinson "Breakthroughs" 1868 A. - The volume contains other notable papers by Dumas, Berthelot et al.…

(Paris, Gauthier-Villars), 1869. 4to. In: "Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences", Tome 68, No 7. Pp. (349-) 408. (Entire issue offered). Janssen's paper pp. 367-376. First printing of the paper in which Janssen announced the discovery of a new element. On August 18, 1868, Janssen managed to do just that. He became the first person to observe helium, an element never before seen on Earth, in the solar spectrum. At the time, though, Janssen didn?t know what he?d seen"just that it was something new"Helium, the second most abundant element in the universe, was discovered on the sun before it was found on the earth. Pierre-Jules-César Janssen, a French astronomer, noticed a yellow line in the sun's spectrum while studying a total solar eclipse in 1868. Sir Norman Lockyer, an English astronomer, realized that this line, with a wavelength of 587.49 nanometers, could not be produced by any element known at the time. It was hypothesized that a new element on the sun was responsible for this mysterious yellow emission. This unknown element was named helium by Lockyer.". …