‎Ueber die Vertheilung der Elektricität auf der Oberfläche bewegter Leiter.‎

‎Leipzig, Johann Ambrosius Barth, 1880. Without wrappers as issued in ""Annalen der Physik und Chemie. Hrsg. von G. Wiedemann."", Neue Folge Bd. 13, 6. Heft. Pp. 209-384 a. 1 folded plate, (entire issue offered ""Heft"" 6). Hertz's paper: pp. 266-275.‎

‎First printing of Hertz' doctoral dissertation on the electromagnetic induction in rotating conductors, a purely theoretical work that took him only three months to complete.""It was not a pioneering work but a thorough study of the problem that had been partially treated by many others, from Arago and Faraday to Emil Jochmann and Maxwell. He submitted the dissertation in January 1880 and took his doctoral examination the following month, earning a magna cum laude, a distinction rarely given at Berlin.""(DSB).‎

‎Versuche zur Feststellung einer oberen Grenze für die kinetische Energie der elektrischen Strömung.‎

‎Leipzig, Johann Ambrosius Barth, 1880. Without wrappers as issued in ""Annalen der Physik und Chemie. Hrsg. von G. Wiedemann."", Neue Folge Bd. 10, 7. Heft With Titlepage to vol. 10.. Pp. 337-512 a. 1 folded plate, (entire issue offered ""Heft"" 7). Hertz's paper: pp. 414-448.‎

‎First printing of Hertz's first paper by which he won the Philosophical Faculty Prize (Berlin) in 1879, earning a medal, a first publication in Annalen der Physik and Helmholtz' deepening respect.""To encourage experimental work in the notoriously difficult domain of unclosed currents, Helmholtz proposed for the prize of the Berlin Philosophical Faculty in 1878 a problem dealing with an implication of Weber’s theory: when oscillations of electricity are set up in an unclosed circuit, Weber’s hypothetical electrical inertia should reveal itself in a retardation of the oscillations. Through the experiments that Helmholtz had suggested on the self-induction of doubly wound spirals, Hertz won the Philosophical Faculty prize"" he proved that the inertia of electricity is either zero or less than a very small value, thereby lending experimental support to Helmholtz’ theoretical judgment of the improbability of Weber’s theory.""(DSB).‎

‎Ueber sehr schnelle electrische Schwingungen. (+) Nachtrag zu der Abhandlung über sehr Schnelle electrische Schwingungen (+) Ueber einen Einfluss des ultravioletten Lichtes auf die electrische Entladung. - [THE ANTICIPATION OF WIRELESS TELEGRAPHY]‎

‎Leipzig, Johann Ambrosius Barth, 1887. 8vo. Original half cloth with gilt lettering to spine. Library stamp to verso of title-page. In Annalen der Physik und Chemie, Neue Folge, Band XXXI. Pp. 421-448 + 1 plate Pp. 543-544" Pp. 983-1000 + 1 plate. [Entire volume: VII, 1048 pp. + 7 plates]. Wear to capitals and two nicks (resulting in small holes and loss of paper) to back board. Internally nice and clean. ‎

‎First edition of Hertz's seminal paper on electromagnetic waves in which he empirically demonstrates Maxwell's equations. This discovery and its demonstration led directly to the invention radio of communication, television and Radar.Hertz demonstrates what Maxwell had predicted that electromagnetic waves radiated in space with the speed of light. Hertz determined these waves to be of greater length than light and that they could be reflected.""Experimental proof by Hertz of the Faraday-Maxwell hypothesis that electrical waves can be projected through space was begun in 1887, eight years after Maxwell's death. The two main requirements were (a) a method of producing the waves, supposing that they existed, and (b) a method of detecting them once they were produced."" (PMM, 377.). In the present paper Hertz ""describes the apparatus that he had devised for the detection and measurement of electromagnetic waves, the key to his later success. To prove that electromagnetic waves can be projected through space it was necessary to devise a means of both producing the waves and, more difficult at the time, of detecting them once produced."" (Norman Library, No. 1123).""Hertz's researches on electrical waves vindicated the Helmholtz ideal of the physicist as one whose competences embraced both experiment and mathematics. Hertz entered physics at the right time for one of his abilities to make a critical contribution"" because the outstanding problem of physics was the disorderly condition of electrodynamics, what was needed was someone with the theoretical power to analyze the competing theories and with the experimental judgment to produce the evidence that would persuade the physical community that a decision between the theories had been reached."" (DSB, VI, 348b.)In ""Ueber einen Einfluss des ultravioletten Lichtes auf die electrische Entladung"" Hertz describes for the first time in history the phenomenon that the sparking distances between two electrodes is increased when ultra-violet light falls on the negative conductor. ""In the early 1890's the young inventor Guglielmo Marconi read of Hertz's electric wave experiments in an Italian electrical journal and began considering the Possibility of communication by wireless waves. Hertz's work initiated a technological development as momentous as it physical counterpart."" (DSB, VI, 349a.).The present volume also contains the following articles of interest: Bunsen, R. ""Ueber das Dampfcalorimeter"", 1-14 p.Planck, M. ""Ueber das Princip der Vermehrung der Entropie Zweite Abhandlund: Gesetze der Dissociation gasförmiger Verbindung"", 189-203 p. Hertz, H. ""Nachtrag zu der Abhandlung über sehr Schnelle electrische Schwingungen"", 543-544 p. Hertz, H. ""Ueber einen Einfluss des ultravioletten Lichtes auf die electrische Entladung"", 983-1000 p.Röntgen, W. C. & J. Schneider. ""Ueber die Compressibilität von verdünnten Salzlösungen und die des festen Chlornatriums"", 1000-1005 p.See: The Barchas Collection No. 982" The Haskell F. Normann Library No. 1123 Dibner, Heralds of Science No. 71 The Richard Green Library 204 p Printing and the Mind of Man p. 227 (PMM 370 being Hertz' 1892 book). ‎

‎Die Kräfte electrischer Schwingungen, behandelt nach der Maxwell'schen Theorie.‎

‎Leipzig, Johann Ambrosius Barth, 1889. Without wrappers as issued in ""Annalen der Physik und Chemie. Hrsg. von G. Wiedemann."", Neue Folge Bd. 36, 1. Heft. Pp.1-272 a. 2 folded plates. (Entire issue offered). Hertz's paper: pp. 1-22. The first leaves loose.‎

‎First appearance of an importent paper as it is a continuation of his groundbreaking paper ""Ueber sehr schnelle electrische Schwingungen"", 1887.‎

‎Ueber Strahlen electrischer Kraft. (Aus den Sitzungsberichte der Berliner Acad....Mitgeteilt von Hrn. Verfasser).‎

‎Leipzig, Johann Ambrosius Barth, 1889. Without wrappers as issued in ""Annalen der Physik und Chemie. Hrsg. von G. Wiedemann."", Neue Folge Bd. 36, 4. Heft. Pp.669-936 a. 2 folded plates. (Entire issue offered). Hertz's paper: pp. 669-783. The last leaves loose.‎

‎This importent was first published in ""Sitzungsberichte"" and describes how he proved by experiments that light is electromagnetic waves.‎

‎Ueber die Grundgleichungen der Electrodynamik für bewegte Körper.‎

‎Leipzig, Johann Ambrosius Barth, 1880. Without wrappers as issued in ""Annalen der Physik und Chemie. Hrsg. von G. Wiedemann."", Neue Folge Bd. 41, 11. Heft. Pp. 369-640 (entire issue offered, Heft 11). Hertz's paper: pp. 369-399. cLEAN AND FINE.‎

‎First edition of this importent paper in which Hertz went beyond Maxwell and hereby took the first step on the way to RELATIVITY THEORY.In his second theoretical paper (the paper offered), Hertz applied Maxwell’s equations to moving, deformable bodies. Maxwell had not treated this problem systematically in the Treatise although, unknown to Hertz, he had done so elsewhere. Hertz recognized that to develop an electrodynamics of moving bodies, it was first necessary to specify whether or not the ether moves with bodies. For his part he would assume that the ether is mechanically dragged by moving bodies. The first ground for this assumption was that within the restricted domain of electromagnetic phenomena there was nothing incompatible with the idea of a dragged ether. The second ground was that its denial entailed the complication that two sets of electric and magnetic vectors had to be assigned to each point of space, one for the ether and one for the independently moving body. He recognized at the same time that a dragged ether was an unsure foundation for electrodynamics....""(DSB).Schilpp ""Einstein"" pp. 31 ff. - Whittaker ""A History of the Theories of Aether and Electricity"", pp. 328 ff.‎

‎Ueber die Einwirkung einer geradlinigen Schwingung auf eine benachbarte Strombahn. (+) Ueber Inductionserschneinungen, hervorgerufen durch die electrischen Vorgänge in Isolatoren. (Aus den Sitzungsber. der Berl. Acad. vom 10. Nov. 1887, mit einem Zusa...‎

‎Leipzig, Johann Ambrosius Barth, 1888. Conemp. hcalf. 5 raised bands, gilt spine and gilt lettering to spine. A few scratches to spine. Small stamp on verso of first -and general- titlepage and small stamps to verso of plates. ""Annalen der Physik und Chemie. Hrsg. von G. Wiedemann."", Neue Folge Bd. 34,. VIII,1048 pp. a. 8 folded engraved plates. (Entire volume offered). Hertz' papers: pp. 155-170, pp. 273-285, pp. 551-569, pp. 609-623.‎

‎First appearance of 4 famous and importent papers (2 of them in their final form) in which Hertz established by experiments the similarities between electric waves and light waves.""Hertz followed up his determination of the finite velocity of electric waves by performing a series of more qualitative experiments in 1888 on the analogy between electric and light waves. Passing electric waves through huge prisms of hard pitch, he showed that they refract exactly as light waves do. He polarized electric waves by directing them through a grating of parallel wires, and he diffracted them by interrupting them with a screen with a hole in it. He reflected them from the walls of the room, obtaining interference between the original and the reflected waves. He focused them with huge concave mirrors, casting electric shadows with conducting obstacles. The experiments with mirrors especially attracted attention, as they were the most direct disproof of action at a distance in electrodynamics. They and the experiments on the finite velocity of propagation brought about a rapid conversion of European physicists from the viewpoint of instantaneous action at a distance in electrodynamics to Maxwell’s view that electromagnetic processes take place in dielectrics and that an electromagnetic ether subsumes the functions of the older luminiferous ether."" (DSB)-. ‎

‎Ueber sehr schnelle electrische Schwingungen. (+) Nachtrag zu der Abhandlung über sehr Schnelle electrische Schwingungen.‎

‎Leipzig, Johann Ambrosius Barth, 1887. Without wrappers as issued in ""Annalen der Physik und Chemie. Hrsg. von G. Wiedemann."", Neue Folge Bd. 31, 7. Heft. With the titlepage to vol. 31. Pp. 337-544 a. 2 folded plates, (entire issue offered ""Heft"" 7). Hertz's paper: pp. 421-448 A. PP. 543-544. A Stamp on titlepage and verso of. Clean and fine.‎

‎First edition of Hertz's seminal paper on electromagnetic waves in which he empirically demonstrates Maxwell's equations. This discovery and its demonstration led directly to the invention radio of communication, television and Radar. The paper is the ""ANNOUNCEMENT OF THE DISCOVERY OF THE PRODUCTION BY ELECTRICAL DISCHARGE OF WAVES WHICH HAVE THE PROPERTY OF VERY LONG WAVES""(H.M. Evans).Hertz demonstrates what Maxwell had predicted that electromagnetic waves radiated in space with the speed of light. Hertz determined these waves to be of greater length than light and that they could be reflected.""Experimental proof by Hertz of the Faraday-Maxwell hypothesis that electrical waves can be projected through space was begun in 1887, eight years after Maxwell's death. The two main requirements were (a) a method of producing the waves, supposing that they existed, and (b) a method of detecting them once they were produced."" (PMM, 377.). In the present paper Hertz ""describes the apparatus that he had devised for the detection and measurement of electromagnetic waves, the key to his later success. To prove that electromagnetic waves can be projected through space it was necessary to devise a means of both producing the waves and, more difficult at the time, of detecting them once produced."" (Norman Library, No. 1123).""Hertz's researches on electrical waves vindicated the Helmholtz ideal of the physicist as one whose competences embraced both experiment and mathematics. Hertz entered physics at the right time for one of his abilities to make a critical contribution"" because the outstanding problem of physics was the disorderly condition of electrodynamics, what was needed was someone with the theoretical power to analyze the competing theories and with the experimental judgment to produce the evidence that would persuade the physical community that a decision between the theories had been reached."" (DSB, VI, 348b.)""In the early 1890's the young inventor Guglielmo Marconi read of Hertz's electric wave experiments in an Italian electrical journal and began considering the Possibility of communication by wireless waves. Hertz's work initiated a technological development as momentous as it physical counterpart."" (DSB, VI, 349a.).‎

‎PHYSIQUE - MP-PC - DEUXIEME ANNEE / ENSEIGNEMENT SUPERIEUR PREMIER CYCLE.‎

‎MASSON. 1986. In-8. Broché. Etat d'usage, Couv. convenable, Dos satisfaisant, Intérieur frais. 419 pages illustrées de nombreuses figures dnas le texte.. . . . Classification Dewey : 530-Physique‎

‎ Classification Dewey : 530-Physique‎

‎Roentgenspektrographische Beobactungen an Zellulose.‎

‎Berlin, Springer, 1920. 8vo. In comtemporary half cloth with gilt lettering to spine. In ""Zeitschrift für Physik"", Band 3. Entire volume offered. Stamp to title page. Otherwise a fine and clean copy. Pp. 196-99. [Entire volume: IV, 476 pp.].‎

‎First appearance of Herzog and his assistant Jancke's paper in which they analysed the analysed patterns from pulverized cellulose.‎

‎Forces and Fields - A Study of Action at a Distance in the History of Physics‎

‎Thomas Nelson and Sons, Ltd Malicorne sur Sarthe, 72, Pays de la Loire, France 1961 Book condition, Etat : Bon hardcover, editor'binding, under editor's printed green dust-jacket fort et grand In-8 1 vol. - 328 pages‎

‎ 1st edition, 1961 Contents, Chapitres : Preface, Contents, x, Text, 318 pages - The logical status of theories - The primitive analogies - Mechanism in Greek science - The Greek inheritance - The corpuscular philosophy - The theory of gravitation - Action at a distance - The field theories - The theory of relativity - Modern physics - The metaphysical framework of physics - Appendix, I and II - Bibliography and index - Mary Hesse (née le 15 octobre 1924, et morte le 2 octobre 2016) est une philosophe des sciences anglaise. Elle a été professeur de philosophie des sciences à l'Université de Cambridge. Sa publication Models and Analogies in Science est une introduction accessible et vastement citée au sujet. the dust-jacket is ok, small missing on the top of the front part and on the corners, and bottom of the spine, it's still nearly complete, editor's binding is clean, inside is near fine, no markings, name of the former owner on the first page, the bottom right corner of the first page is missing, without missing of text, it remains a very good reading copy, text clean and unmarked‎

‎Uber Beobachtungen der durchdringenden Strahlung bei sieben Freiballonfahrten. - [THE DISCOVERY OF COSMIC RAYS]‎

‎Leipzig, S. Hirzel, 1912. Royal8vo. Bound in two contemporary half cloth with white paper title label to spine. In ""Physikalische Zeitschrift"" Vol. 13, 1912. Library stamp to title pages. Otherwise fine and clean. Pp. 1084-91. [Entire volume 1: XXV, (1), 576 pp + XXII plates"" Pp. 577-1228 + XXXV plates.‎

8 Images

‎First printing of Hess's paper in which the discovery of cosmic rays first was introduced. He was awarded the Nobel Prize in Physics in 1936.At the start of the 1900's, French physicist Henri Becquerel discovered that certain elements are unstable, and would transmute into other elements, and in the process, emit what appeared to be particles. These ""particles"" were given the name ""radiation"", and the process itself referred to as ""radioactive decay.""To study the source of this background, Austrian physicist Victor. F. Hess made measurements of radiation levels at different altitudes with electroscopes aboard a balloon. The motivation for this study was to distance the electroscopes from radiation sources in the Earth. Hess went as high as 17,500 feet in his balloon without oxygen tanks. Surprisingly, he found that the radiation levels increased with altitude. Hess interpreted this result to mean that radiation is entering the atmosphere from outer space. He gave this phenomenon the name ""Cosmic Radiation"", which later evolved to ""Cosmic Rays"". Hess was awarded the Nobel Prize in 1936 for his discovery of cosmic rays""""Hess took up the problem stated by Wulf in 1911. He first verified the rate of absorption of gamma rays and then, with the help of the Austrian Academy of Sciences and the Austrian Aeroclub, made ten difficult and daring balloon ascensions, collecting data with improved instrumentation. He reached a height of 5,350 meters, with striking results. He was able to establish that to a height of approximately 150 meters above sea level, radiation decreased according to known laws, while at greater heights radiation increased steadily, following approximately the same laws. He found radiation at 5,000 meters to be several times greater than that at sea level, and also that radiation at all levels was the same night or day, and therefore not the result of the direct rays of the sun. He was thus able to conclude that the radiation he recorded at high altitudes entered the atmosphere from above and was, in fact, of cosmic origin. His results were verified in an extension of his experiments made by W. Kohlhörster in1913-Kohlhörster reached a height of 9,300 meters, and recorded radiation of twelve times that at sea level-but were not acknowledged by other physicists for a number of years. (""Cosmic rays"" were so named by R. A. Millikan in 1925.) In 1913 Hess himself equipped the meteorological station on Hoch Obir (2,141 meters) in Carinthia to accommodate further studies of cosmic radiation" these experiments, however, were brought to a halt by World War I.University, and the University of Innsbruck the Ernst Abbe prize of the Carl Zeiss Foundation (1932)" and the Austrian Medal for Science and Arts (1959). The most important honor, however, was the Nobel Prize in physics, which he shared with C.D. Anderson in 1936, on which occasion he lectured on ""Unsolved Problems in Physics: Tasks for the Immediate Future in Cosmic Ray Studies."" The discovery of cosmic radiation was one of the keys to the study of elementary particles in general, leading to the discovery of the positron, by Anderson in 1932, and of the ? meson by F. Neddermayer (in 1937)."" (DSB)‎

‎Die seltenen Erden vom Standpunkte des Atombaues. Mit 15 Abb.‎

‎Berlin, Springer, 1927. Uncut in orig. printed wrappers. Wrappers loose. VIII,140 pp. Bckstrip with tears.‎

‎First edition.‎

‎Recherches sur les Propriétés du Hafnium.‎

‎Copenhagen, Høst & Søn, 1925. Uncut in orig. printed wrappers. 149 pp., 2 plates.‎

‎First edition. (Det Kgl. Danske Videnskabernes Selskab).‎

‎Guide d'expérimentation. Sciences physiques. Classe de sixième.‎

‎Couverture rigide. Cartonnage de l'éditeur. 106 pages.‎

‎Livre. Editions Graphotech - Scodel, 1977.‎

‎RESUME, AIDE-MEMOIRE PHYSIQUE‎

‎Un ouvrage de 178 pages, format 110 x 155 mm, illustré, relié cartonnage, publié en 1932, Librairie Hachette, bon état‎

‎Baccalauréat - 1ère Partie (Programme de la classe de Première)‎

‎LA GRANDE INDUSTRIE CHIMIQUE DE BASE / COLLECTION ARMAND COLIN N°339.‎

‎ARMAND COLIN. 1959. In-12. Broché. Etat d'usage, Tâchée, Dos satisfaisant, Intérieur acceptable. 211 pages - tâches brunes sur les plats et les contre plats - quelques figures en noir et blanc dans et hors texte.. . . . Classification Dewey : 530-Physique‎

‎COLLECTION ARMAND COLIN N°339. Classification Dewey : 530-Physique‎

‎Electrical Characteristics of Transmission Lines: An Introduction to the Calculation of Characteristic Impedances...‎

‎Artech House Books, Dedham, Mass 1979. Orig. decorated full cloth. 184 pp.‎

‎Die Grundlagen der Physik.‎

‎Julius Springer, Berlin 1924. 8vo. Bound with the original front wrapper in contemporary dark blue full cloth with gilt lettering to spine. In ""Mathematische Annalen, 92 Band, 1924."" Light writing in pencil to title page, other fine and clean throughout. [Hilbert:] 1-32 pp. [Entire volume: (2), 316 pp.].‎

‎First printing of Hilbert's important contribution to the unification of gravitational theory and electrodynamics. Hilbert stated that the present paper essentially was a reprint with insignificant alterations. This is, however, not entirely true as several Hilbert biographers have pointed out, that this version contain ""major conceptual adjustments and a recognition of its deductive structure"" (Renn, The Genesis of General Relativity, p.930). ""...it was Hilbert's aim to give not just a theory of gravitation but an axiomatic theory of the world. This lends an exalted quality to his paper, from the title, 'Die Grundlagen der Physik', The Foundations of Physics, to the concluding paragraph, in which he expressed his conviction that his fundamental equations would eventually solve the riddles of atomic structure"" (Pais: Subtle is the Lord, pp. 257-258). In Hilbert's 1915-paper he falsly believed that electromagnetism was essentially a gravitational phenomenon. ""These and other errors are expurgated in an article Hilbert wrote in 1924 [the present paper]. It is again entitled 'Die Grundlagen der Physik' and contains a synopsis of his 1915 paper and a sequel to it written a year later. Hilbert's collected works, each volume of which contains a preface by Hilbert himself, does not include these two early papers, but only the one of 1924"" (Pais, Subtle is the Lord…, p. 258)‎

‎Die Welt der ungewohnten Dimensionen. Versuch einer gemeinverständlichen Darstellung der modernen Physik und ihrer philosophischen Folgerungen. Mit einem Vorwort von Werner Heisenberg‎

‎Leiden, A.W. Sijthoff, 1953, gr. in-8°, 368 S. + 2 Tafeln, reich illustriert, Original-Leinenband. Orig.-Unschlag, Schönes Ex.‎

‎Steuerung von Elektronenströmen mit einem Dreielektrodenkristall und ein Modell einer Sperrschicht.‎

‎Berlin, Springer, 1938 & 1939. 8vo. In contemporary halv cloth with gilt lettering to spine. In ""Zeitschrift für Physik"", Bd. 111, 1938 & 1939.. Entire volume offered. Stamp to front free end-paper and titlepage, otherwise fine and clean. Pp. 399-408. [Entire volume: IV, 794 pp.].‎

‎First printing.‎

‎EXPOSITION ANALYTIQUE ET EXPERIEMENTALE DE LA THEORIE MECANIQUE DE LA CHALEUR - TOME SECOND / 3e EDITION.‎

‎GAUTHIER-VILLARS. 1876. In-4. Relié demi-cuir. Etat d'usage, Couv. convenable, Dos abîmé, Intérieur frais. XII + 435 pages - Plats et contre-plats jaspés - Auteur, titre, filets et tomaison dorés au dos - Epidermures. 2 PHOTOS DISPONIBLES - . . . . Classification Dewey : 530-Physique‎

‎3e EDITION / THEORIE MECANIQUE DE LA CHALEUR (1ere PARTIE) Classification Dewey : 530-Physique‎

‎LA CINETIQUE MODERNE ET LE DYNAMISME DE L'AVENIR, REPONSE A DIVERSES CRITIQUES FAITES PAR M. CLAUSIUS‎

‎Gauthier-Villars, Paris. 1887. In-4. Broché. A relier, Plats abîmés, Dos abîmé, Intérieur bon état. 106 pages. Avec 2 planches dépliables grand format de gravures en noir et blanc en fin d'ouvrage. Envoi de l'auteur sur le 1er plat (Colmar, 1886). Dos manquant pour la plus grande partie. Cahiers se détachant.. . . . Classification Dewey : 530-Physique‎

‎Doctrines en antagonisme dans la science moderne. Faits définitivement acquis, quant à la nature de la chaleur, de l'électricité, etc. Objections multiples à la théorie cinétique des gaz... Classification Dewey : 530-Physique‎

‎NOUVELLE REFUTATION générale des théories cinétiques. P., Gauthier-Villars, 1886, (2), 41pp. --- L'AVENIR DU DYNAMISME dans les sciences physiques. Réflexions générales au sujet d'un rapport lu par M. Folie. P., Gauthier-Villars, 1886, 7pp., 69pp. --- LA CINETIQUE MODERNE et de dynamisme de l'avenir. Tiré-à-part (Off-print) des Comptes rendus de l'Académie des sciences. 1886, 3pp. --- LA CINETIQUE MODERNE et le dynamise de l'avenir. Réponses à diverses critiques faites par M. Clausius. P., Gauthier-Villars, 1887, 106pp., 2 planches dépliantes --- LA THERMODYNAMIQUE et l'étude du travail chez les êtres vivants. P., Bureaux des revues, 1887, 30pp -- soit 3 OUVRAGES ET 2 MEMOIRES ORIGINAUX PAR G.A. HIRN reliés en un volume‎

‎P., 1886/1887, un volume in 4 relié en demi-basane verte (reliure de l'époque), (dos passé, cachets de bibliothèque).‎

‎---- TROIS OUVRAGES ET DEUX MEMOIRES ORIGINAUX par G.A. HIRN Réunis en un volume ---- BON EXEMPLAIRE ---- "Hirn became one of the first to investigate the internal phenomena of the steam engine. In 1847 he discovered the mechanical equivalent of heat. He established the first heat balance. He showed the beneficial advantage of superheat over dry saturated steam in reducing cylinder condensation. Furthermore, he convinced skeptics of the advantage of steam-jacketing cylinders. He proved decisively that cylinder walls were active thermal reservoirs". (DSB VI pp. 431/432)---- "Independently of Mayer and Joule, Hirn discovered the mechanical equivalent of heat in 1847 and in 1854 constructed the first heat balance". (Bibliotheca Mechanica)**6285/L6DE‎

‎Mechanical movements. Powers, devices and appliances comprising an illustrated description of mechanical movements and devices used in constructive and operative machinery and the mechanical arts, being practically a mechanical dictionary... for the use of inventors, mechanics, engineers‎

‎N.Y., Henley, 1903, un volume in 8 relié en pleine toile éditeur, (3), 403pp., (1pp.), (2), 800 GRAVURES dans le texte‎

‎---- Dixième édition REVUE ET AUGMENTEE ---- BON EXEMPLAIRE ---- Mechanical powers - Transmission of power - Mesurement of power - Steam power - Steam applianes - Motive power - Hydraulic power and devices - Air power appliances - Electric power and construction - Navigation and roads - Gearing - Motion and devices controlling motion - Horological - Mining - Mill and factory appliances - ETC**2686/P6AR‎