London, W. Bulmer and Co., 1820. 4to. No wrappers as extracted from ""Philosophical Transactions"" 1820 - Part I. Pp. 45-100 a. 1 engraved plate.
First printing of one of herschel's importent investigations on polarization and the wave theory of light. He designed a new instrument to project the colored rings onto a screen about three inches behind the analyzer. This method allowed Herschel to examine the details of the tints.
"HERSCHEL, J.F.W. (JOHN FREDERICK WILLIAM). - THE ""HERSCHEL CONDITION"" INTRODUCED.
Reference : 46100
(1821)
London, W. Bulmer and W. Nicol, 1821. 4to. No wrappers as extracted from ""Philosophical Transactions"" 1821 - Part I. With titlepage to Part I. Pp. 222-267 a. 1 engraved plate. Verso of titlepage with 2 stamps.
First appearance of this importent paper in optical theory in which Herschel described how to free lenses from the aberration for two axis points, one of which is infinitely distant. It is known as Herschel's condition. ""Sir John Herschel gave the condition which must be satisfied in order that a symmetrical optical system, free from spherical aberration for two conjugate axial points, may also be free from spherical aberration for two neighbouring and conjugate points upon the axis of the system" but Herschel's condition applies only to first order aberration, i.e. to aberration depending upon the cube of the inclination of the ray to the axis. Abbe shewed, later, that this condition could be included in a wider result, viz. that the spherical aberration, supposed zero, is stationary for axial variations provided that the incident and emergent rays for two conjugate axial points, associated with modified magnification m, satisfy the relation. (G.C. Stewart)
(London: Alexander Strahan and Company, 1868). 8vo. Without wrappers (as issued). Offprint, seperatly paginated, from ""Fortnightly Review 1"", Pp. 435-42. Author's presentation inscription to top of front wrapper: ""Prof Tyndall / With the author's / kind Compliments"". Soiling to front wrappers and nicks throughout, not affecting text. Internally clean. Pp. 8.
First edition, offprint, with the author's presentation inscription to Professor John Tyndall - the father of the Greenhouse Effect, heat radiation and global climate research - of this important paper, in which Herschel promotes the role of the devine in the natural order. Herschel, now famous for originating the use of the Julian day system in astronomy, naming seven moons of Saturn and four moons of Uranus, his investigation in colour blindness and the chemical power of ultraviolet rays, did much to promote the public understanding of science . The present paper constitutes one of his most widely read and popular works. ""During his life John was immensely celebrated, his name epitomizing science to the public, much as that of Einstein did in the next century."" (DSB)Though intended for a popular audience ""On the Origin of Force"" is one of the most important sources for understanding Herschel's general approach to science. A contemporary review of the paper states: ""The article is well worth reading for those who wish to realise the enormous benefit which has been rendered to science by banishing the indefinite uee of the word force and by introducing the term energy, restricting the use of force to the meaning attached to it by Newton. Sir John Herschel still speaks of the ""conservation of force"" (as did likewise Helmholtz, who, however, very early introduces the term Arheitskraft, power to do work, thus removing all ambiguity).Herschel and Tyndall corresponded throughout their mature lives and they shared an overall view on God's place in science. ""In the only case in which we are admitted into any personal knowledge of the origin of force, we find it connected (possibly by intermediate links untraceable by our faculties, but yet indubitably connected) with volition, and by inevitable consequence with motive, with intellect, and with all the attributes of mind in which-and not in the possession of arms, legs, brains, and viscera-personality consists."" (Herschel, rrom the present paper). Tyndall agreed in stating that: ""An inscrutable power of which we know no more than job did, when he said, 'Can man by searching find this power out?'. (Tyndall's ""Belfast Address"").
"HERSCHEL, JOHN W.F. - FLOURESCENCE DISCOVERED IN QUININE SOLUTION
Reference : 42918
(1845)
(London, Richard and John E. Taylor, 1845). 4to. No wrappers as extracted from ""Philosophical Transactions"" 1845 - Part I. Pp 143-145 . pp. 147-153. Clean and fine.
First appearance of these highly influential papers as Herschel here reported the first observation of the fluorescence of a quinine solution in sunlight. - In a footnote to the report Herschel points out that he was writing from memory, having carried out the experiment more than twenty years before. Nevertheless, his reminiscence was enough to spark further exploration, eventually resulting in the modern understanding of fluorescence. In fact, even today, quinine is one of the most commonly utilized fluorophores for spectroscopy, enjoyed by many for the strange, but beautiful fluorescence that was first observed, but unable to be unexplained, by Herschel.
[No place], 1918. 8vo. In the original printed wrappers. Offprint from ""Monthly Notices of the Royal Astronomical Society"", Vol. LXXVIII, No. 8. Fine and clean. Pp. 547-554.
Offprint of a collection of William Herschel Papers presented to the Royal Astronomical Society
London, Lockyer Davis and Peter Elmsly, 1783. 4to. In recent marbled paper wrappers. Extracted from ""Philosophical Transactions"", vol. 73. Including title-page of volume. A few leaves reinforced in margin. (3), iv, (247)-284 pp. + three folded plates.
First appearance of Herschel's famous paper in which he documented his discovery of the movement of the sun and of the entire solar system with it. ""Between 1780 and 1821 Sir Herschel produced some seventy papers, mostly published in the Philosophical Transactions of the Royal Society. These were the results of his astronomical observations which have earned him the title of 'Farther of sidereal astronomy'. The present paper is one of the most important in the series."" (PMM 227)""Herschel analyzed the individual motions of a small number of stars, showing that most of their observed motions were actually the result of the movement of our solar system through space."" (Norman).PMM 227 Norman 1059
London, Peter Elmsly, 1792. 4to. In recent marbled paper wrappers. Extracted from ""Philosophical Transactions"". Including title-page of volume. Leaves reinforced in margin. (2), iii-vi, (2), 28 pp. + 1 folded plate.
First edition of Herschel's important paper on his observations of the rings of Saturn. ""Saturn exercised a special fascination for Herschel, and between 1789 and 1808 he devoted seven papers and part of an eighth to the planet, its ring, and its satellites.On 19 August 1787 Herschel suspected he had found a sixth and previously unknown satellite, but he was not able to confirm this until 28 August 1789, when his forty-foot telescope came into commission. A few days later he found a seventh satellite. For some months he carefully tracked the satellites, establishing for Mimas and Enceladus periods within seconds of the modern values, and giving evidence to show that Iapetus rotates in its period of revolution.He also made careful observations of the rings, which he believed to be solid. As the earth happened to be in the plane of the ring structure at the time, he compared the thickness of the ring when seen edge-on with the diameter of Jupiter's satellites"" and although his estimate exceeds modern values, his method showed that the thickness did not exceed a few hundred miles."" (DSB)
(London, W. Bulmer and Co., 1801). 4to. No wrappers as extracted from ""Philosophical Transactions"" 1801 - Part II. Pp. 354-362 a. 1 engraved plate. The plates depicts the experimental apparatus.
First appearance of Herschel's paper on emission of the Light and Heat of the SunTogether with this paper is: Thomas Andrew Knight, ""Account of some Experiments onthe Ascent of the Sap in Trees."", pp. 333-352 a. 4 engraved folded plates.
Leipzig, Johann Ambrosius Barth, 1884. Without wrappers as issued in ""Annalen der Physik und Chemie. Hrsg.von G. Wiedemann."", Neue Folge Band XXII, No 7. With halftitle to vol. 24. (Entire issue 7) Pp. 305-464 a. 3 folded lithographed plates. Hertz's paper: pp. 449-455. Clean and fine. Halftitle with a small stamp.
First appearance of an importent paper on the THEORY OF ELASTICITY.""At the beginning of 1883, Hertz again became interested in a problem of elasticity. Now it was the question of bending of an infinite plate floating in water and normally loaded at one point. He found that the plate deflects downward under the load but at a certain distance from the load deflection become negative. Then, at an increased distance, they again become positive, and so on. Thusthe surface is wavy, and the high of the waves rapidly diminishes with increase of the distance from the load. He arrived, in this way, at the paradoxical conclusion that a plate, heavier than water, can be made to flow by loading it at the center, The explanation is that due to bending the plate aquires the form of a shell and can press out more water than is equivalent to its own weight.""(Timoshenko ""History of the Strenght of Material"" p.349).
Leipzig, Johann Ambrosius Barth, 1892. 8vo. Contemporary half cloth. VI, (2), 295, (1) pp. Upper part of joints neatly repaired,otherwise a clean and fresh copy.
First edition of Hertz' seminal book on electromagnetic waves, which laid the foundation of radiotelegraphy and radiotelephony.While investigating Maxwell's conception of light as an electromagnetic phenomenon, Hertz exposed that waves of electricity could both be transmitted and received through space. This had profound consequences and led, amongst other things, to Marconi's perfection of wireless telegraphy. ""His [Hertz'] discovery of the properties of reflection, refraction, and polarization in electricity, with this wave theory of electrical motion, laid the foundation of radiotelegraphy and radiotelephony."" (Milestones of Science, p 47.)""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.)""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.).Honeyman, No. 1668 - PMM 377 - Sparrow, Milestones of Science Nr. 101
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).
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).
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).
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.
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.
"HERTZ, H. (HEINRICH RUDOLF). - A NEW INTERPRETATION OF THE ETHER.
Reference : 44844
(1880)
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.
"HERTZ, H. (HEINRICH RUDOLF). - CONFIRMING THE ANALOGY BETWEEN ELECTRIC - AND LIGHTWAVES.
Reference : 44843
(1888)
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)-.
"HERTZ, H. (HEINRICH RUDOLF). - THE BIRTH OF RADIO-COMMUNICATION, TELEVISON AND RADAR
Reference : 44842
(1887)
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.).
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
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.
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
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.
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)
Berlin, Springer, 1927. Uncut in orig. printed wrappers. Wrappers loose. VIII,140 pp. Bckstrip with tears.
First edition.
Copenhagen, Høst & Søn, 1925. Uncut in orig. printed wrappers. 149 pp., 2 plates.
First edition. (Det Kgl. Danske Videnskabernes Selskab).
Couverture rigide. Cartonnage de l'éditeur. 106 pages.
Livre. Editions Graphotech - Scodel, 1977.