Gustave Adolfe.Hirn, (1815-1890). "Remarques sur un Principe de Physique d'un part M. Clausius dans sa Nouvelle Theorie des Moteurs a Vapeur." Institut de France, offprint: Comptes Rendus, 105, 24 October 1887. Paris, Gauthier-Villars, 1888. Signed presentation to J. Tyndall, 17 March 1888. 13pp. Original wrappers, printed outer wrappers. Very Good condition.
G.A. Hirn. "Reflexions sur une critique de M. Hugoniot, parue aux "Comptes Rendus" du 28 Juin" Offprint: Comptes Rendus, vol 103, 12 July, 1886. 4pp. Plain blue wrappers. Presentation copy, signed cordially by "the author". Very Good condition.
G.A. Hirn. "Causes de la Detonation des Bolides et des Aerolithes", published in Paris, Gauthier-Villars, 1886. 10.5x7", 14pp. Outer wrappers. Signed presentation to John Tyndall, 18 Sept 1886. Very Good condition.
G.A. Hirn, "Reflexions Critiques sur la Theorie Cinetique de l'Univers, Refutation Scientifique du Materialisme. Published in Colmar, by E. Barth, 1882. Offprint: "Memoire presente a la Classe des Sciences de l'Academie Royale de Belgique dans sa Seance du 2 Juillet 1881. 11x9", 31pp. Outer wrappers. Signed presentation copy to John Tyndall, dated Colmar, 24.2.86, signed in full. Very Good copy.
G.A. Hirn, "La Notion de Forces, dans la Science Moderne." Paris, Bureau des Deux Revues, offprint de la Revue Scientifique, 1885. Signed presentation copy to John Tyndall, dated from Colmar, 24.2.1886. 7.75"x5", 51pp. Printed wrappers. Very Good copy.
G.A. Hirn, "La Thermodynamique et l'Etude du Travail chez les Etres Vivants", Paris, Bureau des Revues, 1887. 11x8.5", 27pp. Signed presentation copy to John Tyndall, 17 March 1888. 11x8.25", 27pp. Original printed wrappers. Very Good copy.
"Hirn became one of the first to investigate the internal phenomena of the steam engine. He had five engines at his disposal, including two of about 100 horsepower—a Woolf compound and a single-cylinder machine. In 1847 he discovered the mechanical equivalent of heat (later than, but independently of J. R. Mayer and Joule, whose priorities of 1842 and 1843 he acknowledged)."
"In continuing work directed at increasing the efficiency of the mill engine, Hirn established the first heat balance (1857). He showed the beneficial advantage of superheat over dry saturated steam in reducing cylinder condensation; the calculation is still known as Hirn’s analysis. Furthermore, he convinced skeptics of the advantage of steam-jacketing cylinders, a practice that had been discontinued when pressures, temperatures, and speeds had risen significantly above those of Watt’s era: he proved decisively that cylinder walls were active “thermal reservoirs.” Hirn’s Exposition analytique et expérimentale de la théorie meécanique de la chaleur (1862) was among the first systematic treatises on thermodynamics."
"Hirn’s activity was not limited to thermodynamics; the climatology and meteorology of Alsace were an intertest of his later years. Before the Franco-Prussian War he had established a number of weather stations that reported to him. After his retirement in 1880, he was able to resume this work through support from the Institut de France, instrumentation for the major obsrvatory atop his house being furnished by the Ministry of Public Works in Paris. Astronomy also engaged him, a paper on Saturn’s rings causing much discussion."--Complete Dictionary of Scientific Biography, Vol. 6. Detroit: Charles Scribner's Sons, 2008. p431-432.