‎Die gegenwärtige Situation in der Quantenmechanik I-III [All]. (The Present Situation in Quantum Mechanics). - [SCHRÖDINGER'S CAT]‎

‎Berlin, Springer, 1935. Royal8vo. Bound in contemporary half cloth with paper label pasted on to spine. In ""Die Naturwissenschaften"", Vol 23, 1935. Complete issue offered. Light browning throughout and Schrödinger's paper with underlignings. Pp 807-812" Pp. 823-828" Pp. 844-849. [Entire volume: 870, XIX pp].‎

‎First edition and first announcement of Schrödinger's famous reply to the EPR-paradox (also known as Schrödinger's Cat). When in May 1935 Einstein, Podolsky and Rosen published the so-called EPR-paper in ""Physical Review"", they set out to demonstrate that the Copenhagen interpretation of quantum mechanics could not constitute a complete description of nature. The EPR-article prompted a number of responses, e.g. from Bohr, the co-founder of the Copenhagen School, who began writing his response immediately after the publication of the Physical Review article. It is this debate that Schrödinger participates in with his seminal paper on ""The Present Situation in Quantum Mechanics"", in which he presents what is now famously known as Schrödinger's Cat. Schrödinger's Cat is the name of the thought experiment that Schrödinger develops in this article and that was intended as a discussion of the EPR article.After the publication of the EPR article, Einstein and Schrödinger had begun an exchange of letters on the subject of the possibility of quantum mechanics, as interpreted by the Copenhagenists, representing reality. During this exchange of letters, Schrödinger had been inspired by Einstein's view of the problem of applying the Copenhagen interpretation of Quantum mechanics to everyday objects. But Schrödinger, in his response, took his illustration of the absurdity of the interpretation and the incompleteness of quantum mechanics a step further" he applied it to a living entity, namely a cat. Schrödinger imagines a sealed box containing a cat, a bottle of poison, a radioactive source, a Geiger counter and a hammer. When the Geiger counter detects radiation, a mechanism is switched on that makes the hammer fall the hammer breaks the bottle, and the poison kills the cat. Because it is random, when the Geiger counter will detect radiation, and because in Quantum mechanics, physical conditions are described with the aid of a wave-function that explains all possible conditions of the system, Quantum mechanics, according to the Copenhagen interpretation, would come to the conclusion that the cat in the box is both living and dead, at the same time (the wave function is made up of a superposition of the two conditions -the cat being living and the cat being dead-" the two positions collapse into one, as soon as the system is interpreted as consisting of only one condition -either dead or living cat-, with the sole possible conclusion that the cat is both). Due to Heisenberg and Bohr's independent interpretation of Quantum theory (the ""Copenhagen interpretation), Quantum theory had in 1927 developed in a direction unforeseen by Schrödinger. ""Schrödinger was ""concerned and disappointed"" that this ""transcendental, almost physical interpretation of the wave phenomena"" had become the ""almost universally accepted dogma."""" (D.S.B. XII, p. 221). His most famous and widely used attack on this interpretation was that of ""Schrödinger's Cat"". This paradox of the dead-and-alive cat vigorously illustrated the absurdity of quantum mechanics and what was necessary to describe the states within this system. The thought experiment of Schrödinger's cat turned out to be hugely influential, and has become a standard paradox within both physics and philosophy.‎

‎Energieaustausch nach der Wellenmechanik.‎

‎Leipzig, Johann Ambrosius Barth, 1927. 8vo. Contemp. full cloth. Gilt lettering to spine. In ""Annalen der Physik"", Vierte Folge, Band 83. Entire volume offered. Schrödinger's paper: Pp. 956-68. [Entire volume: VIII, 1224 pp. + 9 plates.]. Stamp to inside frontcover, stamped in blind on titlepage. Internally clean.‎

‎First printing of Schroedinger's important paper which preceded the great work by von Neumann (November 1927) connecting thermodynamics and quantum mechanics. Von Neumann showed, in a paper published 1927, how generalized infinite-dimensional Euclidean spaces (function spaces) and linear operators provide the proper mathematical framework for quantum mechanics. ‎

‎Energieaustausch nach der Wellenmechanik.‎

‎Leipzig, Johann Ambrosius Barth, 1927. 8vo. Contemp. hcloth. Gilt lettering to spine. In ""Annalen der Physik"", Vierte Folge, Band 83. Entire volume offered. Schrödinger's paper: Pp. 956-68. [Entire volume: VIII, 1224 pp. + 9 plates.]. Stamp to verso of titlepage. Internally clean.‎

‎First printing of Schroedinger's important paper which preceded the great work by von Neumann (November 1927) connecting thermodynamics and quantum mechanics. Von Neumann showed, in a paper published 1927, how generalized infinite-dimensional Euclidean spaces (function spaces) and linear operators provide the proper mathematical framework for quantum mechanics. ‎

‎Farbenmetrik. - [SCHRÖDINGER ON COLORIMETRY]‎

‎Berlin, Springer, 1920. 8vo. Bound in contemporary half cloth with gilt lettering to spine. In ""Zeitschrift für Physik"", Bd. 1, 1920. Entire volume offered. Library stamp to front free end paper and title page, light wear to extremities. Pp. 201-214. [Entire volume: V, (1), 418 pp.].‎

‎First printing of Schrödinger paper on his little know research area: colorimetry.""His first papers on relativity pointed to a second major field of interest. In addition to these works, and his early papers on relativity, Schrödinger made a detailed study, through both measurement and computation, of the metric of color space and the theory of color vision."" (DSB).‎

‎Grundlinien einer Theorie der Farbenmetrik im Tagessehen, I-III.‎

‎Leipzig, Ambrosius Barth, 1920. 8vo. In contemporary full cloth with gilt lettering to spine. In ""Annalen der Physik"", Vierte Folge, Band 63. Entire volume offered. Library labels pasted on the pasted down front free end paper. Stamp to title page and repairs to first 3 leaves (not affecting text), otherwise a fine copy. Pp. 397-426" Pp. 427-456" Pp. 481-520. [Entire volume: VIII, 923, VII pp.].‎

‎First appearance of Schrödinger's important three-paper series of a theory of colour measurement for daylight vision. ""His first papers on relativity pointed to a second major field of interest. In addition to these works, and his early papers on relativity, Schrödinger made a detailed study, through both measurement and computation, of the metric of color space and the theory of color vision."" (DSB).‎

‎Isotopie und Gibbssches Paradoxen.‎

‎Braunschweig und Berlin, Vieweg & Sohn, Julius Springer, 1921. 8vo. Bound in contemporary half cloth. Stamp to front free end paper. In ""Zeitschrift für Physik. Hrasg. von Karl Scheel"", vol. 5. Entire volume offered. [Schrödinger's paper:] pp. 163-66. [Entire volume: IV, 449, (1) pp].‎

‎First apperance of Schrödinger's paper on isotopy and the Gibb's paradox. ""Schrödinger started explicitly from the previous discussion between de Hevesy and Paneth on the one hand, and Fajans on the other, summarizing the results as 'Thermodynamical diversity of isotopes in principle, in spite of their complete or nearly complete chemical replaceability'. Thus far he partially supported the view promoted by Karlsruhe physico-chemist. However, he contradicted a result which Fajans had obtained, stating that the energy set free by mixing or diffusion of the volumes, containing different isotopes of the same chemical element, was proportional to the difference of the respective atomic weights - hence a consequence, it should become arbitrarily small as the mass difference disappeared. (Mehra, The Historical Development of Quantum Theory, P. 340).‎

‎Mind and Matter. The Tarner Lectures delivered at Trinity College, Cambridge, in October 1956.‎

‎Cambridge, University Press, 1959. Orig. full cloth. VII,194 pp. A few pencil underlinings.‎

‎"Physique quantique et représentation du monde - ""Points/sciences"" n°78"‎

‎Seuil. 1992. In-12. Broché. Bon état, Couv. convenable, Dos satisfaisant, Intérieur frais. 184 pages.. . . . Classification Dewey : 530-Physique‎

‎Intro. et notes par Michel Bitbol. Classification Dewey : 530-Physique‎

‎Science and the Human temperament. Translated and with a biographical Introduction by James Murphy. Foreword by Lord Rutherford.‎

‎London, George Allen & Unwin, (1935). Orig. full cloth. 154 pp. + Publisher's announcements.‎

‎First edition. 2 of the seven papers were published before in 1932 in German as ""Zwei Vorträge"". In 1933 Schrödinger was awarded the Nobel prize jointly with Dirac.‎

‎Theorie der Pigmente von größter Leuchtkraft‎

‎Leipzig, Ambrosius Barth, 1920. 8vo. In full black cloth with gilt lettering to spine. In ""Annalen der Physik"", bd. 62. Entire volume offered. Small library stamp to lower part of title page and library label pasted on to front free end papers. Fine and clean. Pp. 603-22. [Entire volume: VI. 762 pp.].‎

‎First appearance of Schrödinger's important paper in which he presented his theory of pigments with highest luminosity""His first papers on relativity pointed to a second major field of interest. In addition to these works, and his early papers on relativity, Schrödinger made a detailed study, through both measurement and computation, of the metric of color space and the theory of color vision."" (DSB).‎

‎Über den Comptoneffekt (+) Der Energieimpulssatz der Materiewellen.‎

‎Leipzig, Ambrosius Barth, 1927. 8vo. In contemporary full cloth with gilt lettering to spine. In ""Annalen der Physik"", Band 82. Entire volume offered. Library stamp to pasted down front and back free end-paper. Embossed stamp on title page. A fine and clean copy. Pp. 257-64"" Pp. 265-73. [Entire volume: VIII, 1168 pp. + 14 plates.‎

‎First appearance of Schrödinger's famous treatment of the Compton effect.""Schrödinger approached the wave mechanical treatment of the Compton effect in his own paper [the present] on a far less technical level [than Gordon]. He practically went back to the optical analogies that had stimulated the whole development in November 1925, and in which the properties of microscopic particles were described by matter waves and their propagation in homogeneous media. From such consideration, he now - a year later - drew the following conclusion: ""It is to be expected, nay, even demanded, that we should be able, by means of quite simple phase considerations…, to explain the connection between the changes in direction and frequency of the ether wave which occur in the Compton effect and the change of velocity of the electron."" (Mehra, The Historical Development of Quantum Theory)""Compton was able to account for this (lenghtening of wavelenght) by presuming that a photon of light struch an electron, which recoiled, subtracting some energy from the photon and therefore increasing its wavelenght. This made it seem that a photon acted as a particle: thus after more than a century, the particulate natuer of light, as evolved by Newton, was revived... What itamounted to was that Compton brought to fruition the view that electromagnetic radiation had both a wave aspect and a particle aspect, and that the aspect which was most evident depended on how the radiation was tested. De Broglie was, at the same time, showing that this held true also for ordinary particles, such as electrons."" (Asimov)‎

‎Über den Comptoneffekt (+) Der Energieimpulssatz der Materiewellen.‎

‎Leipzig, Ambrosius Barth, 1927. 8vo. In contemporary full cloth with gilt lettering to spine. In ""Annalen der Physik"", Band 82. Entire volume offered. Library stamp to pasted down front free end-paper. Traces after a paper label to lower part of spine. A fine and clean copy. Pp. 257-64"" Pp. 265-73. [Entire volume: VIII, 1168 pp. + 14 plates.‎

‎First appearance of Schrödinger's famous treatment of the Compton effect.""Schrödinger approached the wave mechanical treatment of the Compton effect in his own paper [the present] on a far less technical level [than Gordon]. He practically went back to the optical analogies that had stimulated the whole development in November 1925, and in which the properties of microscopic particles were described by matter waves and their propagation in homogeneous media. From such consideration, he now - a year later - drew the following conclusion: ""It is to be expected, nay, even demanded, that we should be able, by means of quite simple phase considerations…, to explain the connection between the changes in direction and frequency of the ether wave which occur in the Compton effect and the change of velocity of the electron."" (Mehra, The Historical Development of Quantum Theory)""Compton was able to account for this (lenghtening of wavelenght) by presuming that a photon of light struch an electron, which recoiled, subtracting some energy from the photon and therefore increasing its wavelenght. This made it seem that a photon acted as a particle: thus after more than a century, the particulate natuer of light, as evolved by Newton, was revived... What itamounted to was that Compton brought to fruition the view that electromagnetic radiation had both a wave aspect and a particle aspect, and that the aspect which was most evident depended on how the radiation was tested. De Broglie was, at the same time, showing that this held true also for ordinary particles, such as electrons."" (Asimov)‎

‎Über die Kohärenz in Weitgeöffneten Bündeln.‎

‎Leipzig, Ambrosius Barth, 1920. 8vo. In contemporary full cloth with gilt lettering to spine. In ""Annalen der Physik"", Vierte Folge, Band 61. Entire volume offered. Library labels pasted on the pasted down front free end paper. Stamp to title page and repairs to first leaf (not affecting text), otherwise a fine copy. Pp. 69-86. [Entire volume: 760, VIII pp.].‎

‎First appearance of Schrödinger's paper concerning the coherence of wide open bundles. ‎

‎Über die Rotationswärme des Wasserstoffs.‎

‎Berlin, Julius Springer, 1924. 8vo. Bound in contemporary halfcloth. In ""Zeitschrift für Physik"", Bd. 30.Entire issue offered. Stamp to front free end paper. Fine and clean. Pp. 341-359. [Entire volume: IV, 387 pp].‎

‎First printing of Schrödinger's paper on hydrogen heat. ‎

‎Über die Rotationswärme des Wasserstoffs.‎

‎Berlin, Julius Springer, 1924. 8vo. Bound in contemporary halfcloth. In ""Zeitschrift für Physik"", Bd. 30.Entire issue offered. Stamp to front free end paper and title page. Fine and clean. Pp. 341-359. [Entire volume: IV, 387 pp].‎

‎First printing of Schrödinger's paper on hydrogen heat. ‎

‎Über die spezifische Wärme fester Körper bei hoher Temperatur und über die Quantelung von Schwingungen endlicher Amplitude.‎

‎(Berlin, Julius Springer, 1922). 8vo. Bound in contemporary half cloth. In: ""Zeitschrift für Physik"", 11 band, 1922 (not the complete issue). Find and clean. Pp. 170-76. [Offered volume: Pp. 1-324, 327-398.]‎

‎First printing.‎

‎Über die spezifische Wärme fester Körper bei hoher Temperatur und über die Quantelung von Schwingungen endlicher Amplitude.‎

‎Berlin, Springer, 1922. 8vo. Bound in contemporary half cloth with gilt lettering to spine. In ""Zeitschrift für Physik"", Bd. 11, 1922. Entire volume offered except for Einstein's paper on P. 326. Library stamp to front free end paper and title page, light wear to extremities. P. 170-79. [Entire volume: VIII, 328 pp.].‎

‎First printing of Schrödinger's paper on the heat of solids at high temperature and the quantization of a finite amplitude oscillation.‎

‎Quantisierung als Eigenwertproblem. (Erste-Vierte Mitteilung) + Über das Verhältnis der Heisenberg-Born-Jordanschen Quantenmechanik zu der meinen" - [THE BIRTH OF WAVE MECHANICS]‎

‎Leipzig, J.A. Barth, 1926. Bound in 3 uniform contemp. full cloth. Spine with gilt lettering. Lower parts of spine with remains of a paperlabel. Edges very slightly rubbed. In ""Annalen der Physik. Hrsg. von W. Wien und M. Planck."", Vierte Folge, Bde. 79-81. VI,760"VIII,828"VIII,1172 pp. Textillustr. and plates. The Schrödinger papers: Pp. 361-376,489-527,734-756 (Bd. 79) - pp. 438-490 (Bd. 60) - pp. 109-131 (Bd. 81). Internally clean and fine. One page of ""Inhalt"" in Bd. 79 misbound and with a small tear.‎

4 Images

‎First printing and first appearence of these 5 papers which introduces Schrödinger's wave-equations and explains the stationary states of electrons in Bohr's theory of the atom by way of applying de Broglie's concept of electron waves. These papers are among the most important in modern physics.""The intensity of Schrödingers work on the problem (he found the earlier Bohr-Sommerfeld quantum theory unsatisfactory) increased as he saw that he was on the track of ""a new atomic theory"", and it reached a peak during his winter vacation in Arosa. On 27 December 1925 he wrote to Wilhelm Wien, editor of the ""Annalen der Physik"" inMunich that he was very optimistic: ""I believe that I can give a vibrating system...thatyields the hydrogen frequency levels as it eigenfrequencies."" The frequences of the emitted light rays are then obtained, as Schrödinger observed, by establishing the differences of the two eigenfrequencies respectively. ""Consequently the way is opened toward a real understanding of Bohr's frequency calculation - it is really a vibration (or, as the case may be, interference) process, which occurs with the same frequency as the one we observe in the spectroscope. I hope, that I will soon be able to report on this subject in a little more detail and in a more comprehensive fashion"" (Schrödinger's letter to Wien)...The so-called Klein-Gordon equations which Schrödinger used gives an incorrect description of the relativistic structures Schrödinger tried to describe. As this equation he tried to use, describes particles without spin, whereas a a description of electrons requires the Dirac equation...""After a brief interruption Schrödinger took up his method again, but this time he treated the electron nonrelativistically. It soon became apparent that he had arrived at a theory that correctly represented a the behavior of the electron to a very good approximation. THE RESULT WAS THE EMERGENCE OF WAVE MECHANICS IN JANUARY 1926. Schrödinger published the results of his research in a series of four papers in the ""Annalen der Physik"" bearing the overall title ""Quantisierung als Eigenwertproblem."" The first installment, sent on 26 January and received by Wien the next day, contains the first apperarance in the literature of his famous wave equation, written out for the hydrogen atom...""(DSB). In the fifth paper offered here, Schrödinger himself shows that there is an essential equivalence of his theory and that of Heisenberg, Born and Jordan's.‎

‎Quantisierung als Eigenwertproblem. (Erste-Vierte Mitteilung) + Über das Verhältnis der Heisenberg-Born-Jordanschen Quantenmechanik zu der meinen" - [THE BIRTH OF WAVE MECHANICS.]‎

‎Leipzig, J.A. Barth, 1926. Bound recently in 3 fine hcalf of black morocco.. Spine with gilt lettering. In: ""Annalen der Physik. Hrsg. von W. Wien und M. Planck."", Vierte Folge, Bde. 79-81. VI,760"VIII,828"VIII,1172 pp. Textillustr. and plates. The Schrödinger papers: Pp. 361-376,489-527,734-756 (Bd. 79) - pp. 438-490 (Bd. 60) - pp. 109-131 (Bd. 81). Internally clean and fine.‎

‎First printing and first appearence of these 5 papers which introduces Schrödinger's wave-equations and explains the stationary states of electrons in Bohr's theory of the atom by way of applying de Broglie's concept of electron waves. These papers are among the most important in modern physics.""The intensity of Schrödingers work on the problem (he found the earlier Bohr-Sommerfeld quantum theory unsatisfactory) increased as he saw that he was on the track of ""a new atomic theory"", and it reached a peak during his winter vacation in Arosa. On 27 December 1925 he wrote to Wilhelm Wien, editor of the ""Annalen der Physik"" inMunich that he was very optimistic: ""I believe that I can give a vibrating system...thatyields the hydrogen frequency levels as it eigenfrequencies."" The frequences of the emitted light rays are then obtained, as Schrödinger observed, by establishing the differences of the two eigenfrequencies respectively. ""Consequently the way is opened toward a real understanding of Bohr's frequency calculation - it is really a vibration (or, as the case may be, interference) process, which occurs with the same frequency as the one we observe in the spectroscope. I hope, that I will soon be able to report on this subject in a little more detail and in a more comprehensive fashion"" (Schrödinger's letter to Wien)...The so-called Klein-Gordon equations which Schrödinger used gives an incorrect description of the relativistic structures Schrödinger tried to describe. As this equation he tried to use, describes particles without spin, whereas a a description of electrons requires the Dirac equation...""After a brief interruption Schrödinger took up his method again, but this time he treated the electron nonrelativistically. It soon became apparent that he had arrived at a theory that correctly represented a the behavior of the electron to a very good approximation. THE RESULT WAS THE EMERGENCE OF WAVE MECHANICS IN JANUARY 1926. Schrödinger published the results of his research in a series of four papers in the ""Annalen der Physik"" bearing the overall title ""Quantisierung als Eigenwertproblem."" The first installment, sent on 26 January and received by Wien the next day, contains the first apperarance in the literature of his famous wave equation, written out for the hydrogen atom...""(DSB). In the fifth paper offered here, Schrödinger himself shows that there is an essential equivalence of his theory and that of Heisenberg, Born and Jordan's.Brandt, Harvest of a Century, no. 39.‎

‎Quantisierung als Eigenwertproblem. (Erste-Vierte Mitteilung) + Über das Verhältnis der Heisenberg-Born-Jordanschen Quantenmechanik zu der meinen. - [THE BIRTH OF WAVE MECHANICS]‎

‎Leipzig, J.A. Barth, 1926. 8vo. All five paper bound separately in blank blue wrappers. Extracted from In ""Annalen der Physik. Hrsg. von W. Wien und M. Planck., Vierte Folge, Bde. 79-81.""Entire issue 4, 6, 8, 13 and 18 offered. A fine and clean set. [Schrödinger's papers:] Pp. 361-376" Pp. 489-527" Pp. 734-756 (Bd. 79). Pp. 438-490 (Bd. 60). Pp. 109-131 (Bd. 81).‎

‎First printing and first appearence of these 5 papers which introduces Schrödinger's wave-equations and explains the stationary states of electrons in Bohr's theory of the atom by way of applying de Broglie's concept of electron waves. These papers are among the most important in modern physics and ""almost overnight, made Schrödinger famous"" (Brandt, Harvest of a Century).""The intensity of Schrödingers work on the problem (he found the earlier Bohr-Sommerfeld quantum theory unsatisfactory) increased as he saw that he was on the track of ""a new atomic theory"", and it reached a peak during his winter vacation in Arosa. On 27 December 1925 he wrote to Wilhelm Wien, editor of the ""Annalen der Physik"" inMunich that he was very optimistic: ""I believe that I can give a vibrating system...thatyields the hydrogen frequency levels as it eigenfrequencies."" The frequences of the emitted light rays are then obtained, as Schrödinger observed, by establishing the differences of the two eigenfrequencies respectively. ""Consequently the way is opened toward a real understanding of Bohr's frequency calculation - it is really a vibration (or, as the case may be, interference) process, which occurs with the same frequency as the one we observe in the spectroscope. I hope, that I will soon be able to report on this subject in a little more detail and in a more comprehensive fashion"" (Schrödinger's letter to Wien)...The so-called Klein-Gordon equations which Schrödinger used gives an incorrect description of the relativistic structures Schrödinger tried to describe. As this equation he tried to use, describes particles without spin, whereas a a description of electrons requires the Dirac equation...""After a brief interruption Schrödinger took up his method again, but this time he treated the electron nonrelativistically. It soon became apparent that he had arrived at a theory that correctly represented a the behavior of the electron to a very good approximation. THE RESULT WAS THE EMERGENCE OF WAVE MECHANICS IN JANUARY 1926. Schrödinger published the results of his research in a series of four papers in the ""Annalen der Physik"" bearing the overall title ""Quantisierung als Eigenwertproblem."" The first installment, sent on 26 January and received by Wien the next day, contains the first apperarance in the literature of his famous wave equation, written out for the hydrogen atom...""(DSB). In the fifth paper offered, Schrödinger himself shows that there is an essential equivalence of his theory and that of Heisenberg, Born and Jordan's.Brandt, Harvest of a Century, no. 39.‎

‎Quantisierung als Eigenwertproblem. Part I-IV. (Erste-Vierte Mitteilung) (+) Über das Verhältnis der Heisenberg-Born-Jordanschen Quantenmechanik zu der meinen" - [THE BIRTH OF WAVE MECHANICS]‎

‎Leipzig, J.A. Barth, 1926. 8vo. Bound in three volumes: two uniform contemporary half cloth and one contemporary full cloth. In ""Annalen der Physik. Hrsg. von W. Wien und M. Planck., Vierte Folge, Bde. 79-81."" Band 79 (full cloth) with gilt lettering to spine, library label pasted on to pasted down front free end-paper and library stamp to front free end-paper. Band 80,81 (half cloth) with a copy of the title page pasted on the front boards. White handwritten title to spine and coners bumped. Library cards inserted on pasted down front free end-paper. All three copies internally fine and clean. [Schrödinger's papers:] Pp. 361-376" Pp. 489-527 Pp. 734-756 (Bd. 79). Pp. 438-490 (Bd. 60). Pp. 109-131 (Bd. 81). [Entire volumes: VII, (1), 160 pp. + 10 plates VII, (1), 828 pp. + 15 plates" VIII, 1172 pp. + 11 plates.].‎

‎First printing and first appearence of these 5 papers which introduces Schrödinger's wave-equations and explains the stationary states of electrons in Bohr's theory of the atom by way of applying de Broglie's concept of electron waves. These papers are among the most important in modern physics.""The intensity of Schrödingers work on the problem (he found the earlier Bohr-Sommerfeld quantum theory unsatisfactory) increased as he saw that he was on the track of ""a new atomic theory"", and it reached a peak during his winter vacation in Arosa. On 27 December 1925 he wrote to Wilhelm Wien, editor of the ""Annalen der Physik"" inMunich that he was very optimistic: ""I believe that I can give a vibrating system...thatyields the hydrogen frequency levels as it eigenfrequencies."" The frequences of the emitted light rays are then obtained, as Schrödinger observed, by establishing the differences of the two eigenfrequencies respectively. ""Consequently the way is opened toward a real understanding of Bohr's frequency calculation - it is really a vibration (or, as the case may be, interference) process, which occurs with the same frequency as the one we observe in the spectroscope. I hope, that I will soon be able to report on this subject in a little more detail and in a more comprehensive fashion"" (Schrödinger's letter to Wien)...The so-called Klein-Gordon equations which Schrödinger used gives an incorrect description of the relativistic structures Schrödinger tried to describe. As this equation he tried to use, describes particles without spin, whereas a a description of electrons requires the Dirac equation...""After a brief interruption Schrödinger took up his method again, but this time he treated the electron nonrelativistically. It soon became apparent that he had arrived at a theory that correctly represented a the behavior of the electron to a very good approximation. THE RESULT WAS THE EMERGENCE OF WAVE MECHANICS IN JANUARY 1926. Schrödinger published the results of his research in a series of four papers in the ""Annalen der Physik"" bearing the overall title ""Quantisierung als Eigenwertproblem."" The first installment, sent on 26 January and received by Wien the next day, contains the first apperarance in the literature of his famous wave equation, written out for the hydrogen atom...""(DSB). In the fifth paper offered, Schrödinger himself shows that there is an essential equivalence of his theory and that of Heisenberg, Born and Jordan's.‎

‎Ansichten von der Nachteile der Naturwissenschaft. Mit 2 Kupfertafeln. Neubearbeitete und wohlfeilere Auflage.‎

‎Dresden, Arnoldischen Buichhandlung, 1818. Uncut in orig. blue wrappers, part of printed titlelabel preserved. VI,410 pp. and 2 large folded astronomical plates. One plate with a small tear (no loss) and a faint dampstain to plates Textleaves clean.‎

‎Scarce enlarged edittion of Schubert's anti-materialistic treatise. He was influenced by the Nature philosophy of Schelling and reacted strongly against a purely materialistic approach to the sciences. He expressed this in his early work, Ansichten von der Nachtseite der Naturwissenschaften (1808). Schubert, Gotthilf Heinrich von (Hohenstein, Saxony, 1780-1860, Laufzorn, Bavaria), abandoned the study of theology at Leipzig University and turned to medicine and the natural sciences, moving later to Jena. In 1819 was appointed to the chair of natural sciences at Erlangen University. In 1827 he moved to Munich University, becoming a member of the Munich Academy. He was ennobled in 1853. ‎

‎Le grand péril des radiations , suivi d'une étude du professeur Lacassagne‎

‎Payot , Bibliothèque Scientifique Malicorne sur Sarthe, 72, Pays de la Loire, France 1958 Book condition, Etat : Bon broché In-8 1 vol. - 250 pages‎

‎ Contents, Chapitres : Hiroshima - prodromes de la crise - dangers modernes - radiations et biologie - mauvais usage et abus - poisons radioactifs - accidents atomiques - enfants et rayons - conséquences pour l'hérédité - atome et justice - explosions nucléaires - guerre nouvelle - sauvegarde de l'avenir - radiations en France - effets tardifs des radiations ionisantes ‎

‎Le grand péril des radiations , Traduction de René Sudre - Suivi d'une étude du professeur Lacassagne‎

‎Payot , Bibliothèque Scientifique Malicorne sur Sarthe, 72, Pays de la Loire, France 1958 Book condition, Etat : Moyen broché grand In-8 1 vol. - 250 pages‎

‎ 1ere traduction Contents, Chapitres : Le nuage d'Hiroshima - Les prodromes de la crise - Les dangers modernes des radiations - Les radiations et la biologie - Le mauvais usage et l'abus des radiations - Les poisons radioactifs - Les accidents atomiques - Les enfants et les rayons - Conséquences pour l'hérédité - L'atome et la justice - Les explosions nucléaires - La guerre nouvelle - La sauvegarde de l'avenir - Documents annexes : Le problème des radiations en France, les effets tardifs des radiations ionisantes sur la santé de l'homme, par le professeur A. Lacassagne mouillures sur les plats de couverture, coin du plat superieur corne, petite dechirure sans manque sur le bas du mors du plat superieur - interieur tres frais, hormis quelques tres rares annotations à l'encre‎

‎Theorie und Praxis der Feuerungs-Kontrolle in leicht verständlicher Darstellung. Nebst einem Anhang: Übersicht über die erforderlichen Kontroll-Anlagen unter Berücksichtigung verschiedener Apparat-Anordnungen.‎

‎Berlin, Polytechnische Buchhandlung A. Seydel, 1905, in-4°, VIII + 174 S., mit 56 Textabbildungen und vielen Tabellen + 1 Falttafel, 1 Stempel ‘Dr. Ed. Marmier Ing.-Chim.’, roter Halblederband, Rücken mit einigen Goldfileten, oben leicht berieben, jdoch schönes Exemplar.‎

‎Die Abbildungen zeigen grösstenteils Apparate für die Feuerungskontrolle. Zur Zeit dieser Publikation war der Verfasser Assistent an der Physikalisch-Technischen Reichsanstalt in Berlin-Charlottenburg. Poggendorff IV/1364. Image disp.‎