‎Theory‎

‎Bleibtreu, Carl‎

‎Revolution der Literatur. Mit einem Gedicht von Hermann Friedrichs. Zweite, VERMEHRTE und VERBESSERTE Auflage.‎

‎Berlin: Wilhelm Friedrich, 1886. XXXIV,95 Seiten 8°. Originalhalbleinen mit schönem vergoldetem Rückentitel 23cm‎

‎Ganz kleiner Name auf Vorsatz, auf Vorsatz eingeklebt ein Zeitungsbericht über einen Prozeß des Schriftstellers Otto von LEIXNER gegen Carl Bleibtreu ( 1889). Wichtige Programmschrift des deutschen Naturalismus. - Mit einem Einleitungsgedicht von Hermann Friedrichs : » Nun ist's genug der alten Leier! / Ich habe satt den Backfischton! / Merkt auf, ihr feilen Kunstentweiher: / Zu Ende geht der Mode Frohn (sic!) !..... " NICHT in der deutschen Nationalbibliothek. ( Auskunft KVK )‎

Bookseller reference : 113636

‎Blitz, Georg‎

‎Die Retina-Fotografie : Fotopraxis mit Retina u. Retinette. 2. erw. Aufl.‎

‎Stuttgart : Verl. Die Schönen Bücher Strache 1961. 326 S. : mit Abb. ; 8°, ohne Schutzumschlag Lw., gebundene Ausgabe, Leinen, Exemplar in gutem Erhaltungszustand‎

‎Foto-Klei‎

Bookseller reference : 63177

‎Blond Georges.‎

‎STORIA DELLA GRANDE ARMÉE 1804-1815.‎

‎(Codice SR/0238) In 8° (22 cm) 668 pp. Prima edizione italiana. Storia e gesta del leggendario esercito napoleonico. Con 24 tavole a colori fuori testo e molte illustrazioni in nero nel testo. Legatura tutta tela editoriale, tassello e titolo oro, sovraccoperta. Uniforme ingiallitura della carta. Volume ottimo. ~~~ SPEDIZIONE IN ITALIA SEMPRE TRACCIATA‎

‎BLUM, H‎

‎Aus dem tollen Jahr. Eine Erzählung aus 1849. 2. Auflage.‎

‎Heidelberg, Winter, 1901. VII, 330 S. OLwd (Exlibris, Namensstempel auf Titel).‎

‎Blum, Sohn des 1849 erschossenen Robert Blum, schrieb dieses Buch als Abfallprodukt zu seinem Werk über die deutsche Revolution 1848/49.‎

Bookseller reference : 3312279

‎Blundell, Sue & Margaret Williamson (Eds. )‎

‎THE SACRED AND THE FEMININE IN ANCIENT GREECE‎

‎Pencil and pen underlining and notes to a few pages. Else minor shelfwear. ; 9.2 X 6.2 X 0.5 inches; 208 pages‎

‎Blunt, Anthony‎

‎Artistic Theory in Italy 1450 - 1600‎

‎Reprint. 8vo, 168 pages, illustrated. Very good condition paperback, page edges browned. 39882. eng‎

‎Bluntschli, Johann Caspar [auch: Kaspar]‎

‎Geschichte des Allgemeinen Statsrechts [Staatsrechts] und der Politik. Seit dem sechzehnten Jahrhundert bis zur Gegenwart (= Geschichte der Wissenschaften in Deutschland. Neuere Zeit, Band 1).‎

‎München, Cotta, 1864. XVI, 667 S. Halbleinenband der Zeit mit neuerem handschriftlichem Rückenschild. Ein gut erhaltenes Exemplar mit nur leichten Gebrauchsspuren.‎

‎Gut Erste Ausgabe.‎

Bookseller reference : 005147

‎Boardman, John / Felten, Florens [Trans.]‎

‎Rotfigurige Vasen Aus Athen: Die Archaische Zeit Ein Handbuch. [SERIES]: Kulturgeschichte Der Antiken Welt, Band 4‎

‎Contains b&w plates. 230x160 mm. 285 pages. Hardcover with dust-jacket. Jacket edges slightly torn. Binding partly visible between front inner cover and pages. Pages slightly yellowing. Else in good condition.‎

‎Bobbio Norberto‎

‎Contro i nuovi dispotismi. Scritti sul berlusconismo‎

‎br. Il libro raccoglie, a cura di "Critica liberale", tutti gli articoli e i vari scritti in cui Norberto Bobbio negli ultimi anni della sua vita affrontò, con la profondità e la lungimiranza che lo avevano sempre contraddistinto, il fenomeno del berlusconismo. Nell'impietosa disamina condotta senza alcun livore, ma con rigore scientifico e passione civile, l'autore affronta, all'alba della Seconda Repubblica, temi come il finanziamento di Forza Italia, la sua forma-partito, il falso liberalismo di Berlusconi, le debolezze e le complicità dell'opposizione, il monopolio televisivo, le prime avvisaglie di "larghe intese", le forme vecchie e nuove del dispotismo e del populismo. Leggendo queste pagine il lettore rimpiangerà ancora di più la scomparsa di un grande maestro tanto "omaggiato" quanto inascoltato, e capirà meglio le ragioni del declino dell'Italia.‎

‎BOBERTAG, Otto (Hrsg.)‎

‎Mandevilles Bienenfabel.‎

‎München, Müller, 1914. XXX, 400 S. Priv.-Hlwd (mit eingebundener OBroschur) (Stempel auf Vorsatz).‎

‎Bibliothek der Philosophen, 15.‎

Bookseller reference : 3490037

‎Boccaletti Alessandro‎

‎La Federazione d'Italia. Vol. 1: La fondazione‎

‎brossura "La Federazione D'Italia è un progetto articolato composto in Cinque Carte Fondamentali dei Cittadini Italiani, per la Fondazione di una nuova forma etica di democrazia partecipativa diretta. In questo saggio, l'autore presenta l'elaborazione composta delle prime quattro carte fondamentali. Un'Italia indipendente, repubblicana, presidenziale e federalista, e composta di tre confederazioni, che accorpano diciotto Distretti Territoriali, comprensivi di centodieci Province e settemila novecento novantotto Comuni, vera espressione del Popolo, prende forma in un'esposizione lineare. La Repubblica Presidenziale della Federazione dei Distretti Territoriali D'Italia è una creazione originale, etica, e che valorizza i valori e le virtù del Popolo italiano. La morale etica si contrappone alla torbidezza morale".‎

‎Bocchi Renato‎

‎Spazio, arte, architettura. Un percorso teorico‎

‎br. La "corrispondenza di amorosi sensi" fra arte e architettura è il perno di interesse del volume, compendio di lezioni, conferenze e saggi connessi al corso di Teorie dell'architettura dell'IUAV e ai seminari del dottorato Teorie e Progetto della Sapienza. Al centro dell'attenzione è lo spazio, assunto come "immateriale" materia prima con cui si propizia l'esperienza percettiva e multisensoriale dell'architettura da parte del fruitore. Il percorso teorico proposto trascura le componenti oggettuali per focalizzarsi decisamente sugli aspetti relazionali, verso un'architettura delle relazioni. Adottando un metodo associativo-comparativo, si analizzano esperienze dell'arte contemporanea (dalle avanguardie costruttiviste allo spazialismo di Fontana fino alla scultura di Chillida, Oteiza, Iglesias, Serra, Penone, alle delocazioni di Parmiggiani, agli skyscapes di Turrell) ed esperienze dell'architettura contemporanea (da Navarro Baldeweg e Campo Baeza ad Aires Mateus, da Holl a Tschumi, da Siza a And?, da It? a Sejima e Kuma, da Piano a Barozzi-Veiga), accomunate dall'interesse per l'accurato trattamento degli spazi e della loro intima percezione.‎

‎Boccioni Umberto‎

‎Scritti sull'arte‎

‎ill., br. Questa raccolta di tutti gli scritti di Umberto Boccioni riporta delle memorie fondamentali per la storia dell'arte contemporanea. Questi saggi, manifesti, lettere e diari con la propria fisionomia, estetica e poetica, concorsero a delineare uno di quei movimenti, il Futurismo, che si definirono grazie ai testi di Kandinsky, Malevic, Delaunay e Mondrian col nome di Avanguardie artistiche. Non solo ne emergono i particolari del percorso creativo e umano di un grande protagonista dell'arte contemporanea, qual è stato Umberto Boccioni, ma anche l'infatuazione positivista, il concetto di azione, modernità e rischio, nonché la fiducia nel progresso che hanno informato le riflessioni del primo Novecento italiano. Una società piena di aspirazioni rigenerative e speranze che tuttavia si dimostrano disattese dall'avanzare della guerra: "Da questa esistenza io uscirò con un disprezzo per tutto ciò che non è arte", scriveva Boccioni dal fronte in una lettera del 1916 pochi giorni prima della sua morte. Da qui scaturisce l'originalità del pensiero boccioniano teso al rinnovamento della sensibilità estetica del suo tempo a partire dalla vita, dalla realtà attuale, in un connubio arte-vita che rappresenta il nucleo più autentico e genuino del primo futurismo, ma che non manca di aneliti molte volte tragici e disincantati.‎

‎Boccioni Umberto; Zollo F. (cur.)‎

‎La gran madre. Pensieri sull'arte‎

‎ill., br. Una selezione di pensieri sull'arte di Umberto Boccioni, il maggior teorico del Futurismo in arte e tra più significativi pittori e scultori dello stesso movimento, nella sua pur breve parabola esistenziale.‎

‎Boddy, Gillian; Mansfield, Katherine‎

‎Katherine Mansfield : The Woman and the Writer‎

‎A very good paperback. Clean, tight, unmarked. ...‎

‎Bodenmann-Ritter, Clara‎

‎Josef Beuys. Jeder Mensch ein Künstler : Gespräche auf der documenta 5. 4. Auflage. Geringfügig veränderte Ausgabe.‎

‎Frankfurt a. M., Berlin : Ullstein, 1992. 121 Seiten, eine Abbildung, 18 cm. Originalbroschur.‎

‎Sehr gutes Exemplar.‎

Bookseller reference : 279612

‎Boer, Gerrit‎

‎Medien-Archiv. Agentur BILWET. Aus dem Niederländ. von. Mit einem Vorw. zur dt. Ausg. von Diedrich Diederichsen 1. Aufl.‎

‎Bensheim ; Düsseldorf : Bollmann, 1993. 273 S. ; 21 cm kart.‎

‎Fußschnitt mit kl. Strich und etwas schiefgelesen, sonst gut. Nach Bewegungslehre, Geschichten aus der holländischen Hausbesetzerszene, die 1991 in der Edition ID-Archiv erschienen, veröffentlicht die Agentur Bilwet eine Medientheorie, die sich bereits gegen Ende der vorangegangenen Publikation andeutete. Trotzdem wäre es falsch, diese Gruppe eines Wechsels von der Aktion zur bloßen Theorie zu bezichtigen. Das Amsterdamer Kollektiv arbeitet sowohl im praktischen als auch theoretischen Bereich, genauso wie es auch jene inzwischen selten gewordene Verbindung von Medienanalyse und Politik eingeht. Sein Programm ist die Ausübung der illegalen Wissenschaft durch Rundfunksendungen, Vortragstourneen, Manifeste, Bücher und Übersetzungen von Texten anderer Autoren. Erst kürzlich machten seine Mitglieder Geert Lovink und Arjen Mulder mit ihrer Datendandy-Tour 94 durch die deutschsprachigen Länder von sich reden. Wie auch die Agentur Bilwet die Entwicklung der Medien gerne von ihrem fiktiven Ende aus beschreibt, so läßt sich auch ihr Buch Medien-Archiv von seinem Ende aus erläutern. Denn in gewissem Widerspruch zu Diedrich Diederichsens Vorwort, der die Publikation der holländischen Autoren von allen anderen Medientheorien entschieden abgrenzt, sind Agentur Bilwets Äußerungen, wie die Schlußkapitel belegen, nicht im theoriefreien Raum angesiedelt. Im Gegenteil, mit Texten wie Remember Baudrillard oder Virilio Calling zeigen die Autoren auf, woran ihr Denken anknüpft. Auch James Cameron, der Erfinder des Terminators, und Klaus Theweleit dürfen da nicht fehlen. Neben diesem Schlußabschnitt birgt das Buch zwei weitere Teile: die sogenannten UTOs (= Unbekannte Theorie-Objekte) und die Definitiven Essays. Ihnen voran geht einer kurzer Text, der das Schreiben über technische Medien in einem Buch reflektiert. ISBN 9783927901346‎

Bookseller reference : 1183612

‎Boeri Giancarlo, Crociani Piero.‎

‎L'ESERCITO BORBONICO DAL 1789 AL 1815.‎

‎(Codice MT/2109) In 4° (30,5x21 cm) 470 pp. e 68 tavole a colori di Massimo Brandani. Ex libris. Cartone editoriale, titolo oro, sovraccoperta. Lievemente usato, ma in buono stato. ~~~ SPEDIZIONE IN ITALIA SEMPRE TRACCIATA‎

‎Boffi G. (cur.)‎

‎Tutto musica. Schemi riassuntivi, quadri d'approfondimento‎

‎br. Per memorizzare rapidamente la storia della musica classica e del jazz. Dalle origini alla computer music. Studiare in sintesi i grandi musicisti, le scuole e le tendenze, le forme e le tecniche musicali.‎

‎Bogianckino, Mehta, Chung, Manca.‎

‎55° MAGGIO MUSICALE FIORENTINO.‎

‎(Codice MU/0842) In 4° (cm 28x25,5) 181 pp. Con 48 foto in nero e a colori. Brossura editoriale lievemente iingiallita, interno in ottimo stato. ~~~ SPEDIZIONE IN ITALIA SEMPRE TRACCIATA‎

‎Bogoljubow, Nikolaj N. / Jurij Alekseevic Mitropolski‎

‎Asymptotische Methoden in der Theorie der nichtlinearen Schwingungen.‎

‎Berlin: Akademie-Verlag, 1965. XII, 453 S. (25 cm) Leinen mit Umschlag / gebundene Ausgabe‎

‎3. Aufl.; Mit dem Errata-Zettel!; Schutzumschlag gebräunt; Papier sehr leicht gebräunt, Namenseintrag auf Vorsatzblatt; sonst gut erhalten.‎

Bookseller reference : 55410

‎BOHR N. BOHR'S SECOND ATOMIC THEORY‎

‎Atomic Structure Structure of multi-electron atoms part I Atomic Structure Structure of multi-electron atoms part II.‎

‎London Macmillan & Co. 1921. Royal8vo. Bound in two uniform contemporary half calfs with two black leather title label with gilt lettering to spines. Five raised bands. In "Nature". Vol. 7 and 8 both 1921. One of the black title label missing parts of it. Library stamp of Christ Church College Oxford on first page of index with their bookplate on front free endpaper and that of Dr Lee's Laboratory Christ Church on front paste-down slight wear to extremities otherwise fine and clean. Pp. 104-7; Pp. 208-9. � First printing of these two seminal papers constituting Bohr's second atomic theory in which Bohr presented the first correct treatment of the quantum theory of multi-electron atoms. "The impact of Bohr's new ideas was immediate and strong as can be seen from an exchange of letters following Bohr's first Nature article. Land� to Bohr: "Until your full and detailed exposition promised in the Nature paperappears there is no sense in doing any more work in atomic theory. Sommerfeld to Land�: "We must relearn completely". Sommerfeld to Bohr: "The greatest advancement in atomic structure since 1913 � If as it appears you can reconstruct mathematically the numbers 2 8 18 . of the elements in the periods that is in fact the fulfillment of the boldest hopes in physics". Pais Niels Bohr's times.<br><br>Bohr was stimulated to write the present letters to Nature after reading another letter in the same journal by Norman Campbell. Campbell had in 1920 compared the Bohr-Sommerfeld theory of atomic structure and the Lewis-Langmuir theory of molecular structure and had argued that "they are not really inconsistent". Bohr however felt that Campbell had not described the situation correctly and he wrote: "Dr. Campbell puts forward the interesting suggestion that the apparent inconsistency under consideration may not be real but rather appear as a consequence of the formal character of the principles of quantum theory which might involve that the pictures of atomic constitution used in explanation of different phenomena may have a totally different aspect and nevertheless refer to the same reality". hardcover‎

Bookseller reference : 47052

‎BOHR NIELS + HENRY MOSELEY. THE BIRTH OF MODERN ATOMIC THEORY PMM 411‎

‎On the Constitution of Atoms and Molecules. 3 Parts all. The High-Frequency Spectra of the Elements.‎

‎London Taylor & Francis 1913. 8vo. Bound in one nice contemporary half calf binding with gilt leather title-label to spine. Published in "The London Edinburgh and Dublin Philosophical Magazine and Journal of Science" Vol. 26. No. 151-156 offered. Small repair to spine and blind stamped to lower part of title page. Front hindge a bit loose. A fine copy. The Bohr papers: pp. 1-25; pp. 476-502; pp. 857-875. Moseley: Pp. 1024-1034. Entire volume: VIII 1064 pp. 24 plates. � First edition of Bohr's seminal main work which constitutes the departure from classical theories to the birth of modern atomic physics; by incorporating Planck's quantum postulate it became possible to calculate the wavelength of the hydrogen emission and thus to explain the regularity of the Balmer-lines. In 1922 Bohr was awarded the Nobel Prize "for his services in the investigation of the structure of atoms and of the radiation emanating from them".<br><br>"Bohr's three-part paper postulated the existence of stationary states of an atomic system whose behavior could be described using classical mechanics while the transition of the system from one stationary state to another would represent a non-classical process accompanied by emission or absorption of one quantum of homogeneous radiation the frequency of which was related to its energy by Planck's equation" Norman.<br><br>In his previous paper "On the Theory of Decrease of Velocity of Moving Electrified Particles on passing through Matter" Bohr had adopted Rutherford's nuclear model of the atom and had become convinced that it was the peripherical electrons that determined the chemical properties of an element whereas the nucleus determine the radioactive properties. However Rutherford's model had an apparent explanatory problem: Why were the negatively charged electrons held away from the positive nucleus <br>In his doctorial dissertation on the electron theory of metals Bohr had clarified the limitations of this theory in particular its ability to explain magnetic properties and he had shown how this arose from the classical nature of some of its foundations. Bohr strongly expected that the key to solving this problem was to be found in some way of introducing Planck's law of quantum action.<br>In the beginning of 1913 Bohr heard about Rydberg's remarkable discovery in spectroscopy. Rydberg's formula could represent the frequencies of the lines of the hydrogen spectrum in the simplest form in terms of two integers. As soon as Bohr saw this formula he immediately recognized that it gave him the missing clue to the correct way to introduce Planck's law of quantum of action into the description of the atomic systems. <br>The rest of the academic year was spent reconstructing the whole theory upon the new foundation and expounding it in a large treatise which was immediately published as these three papers in the 'Philosophical Magazine'. It was in these papers that Bohr first gave his postulates of the orbital structure of the electrons and their quantized radiation.<br><br>Bohr's atomic theory inaugurated two of the most adventurous decades in the history of science. Bohr introduced the following postulates: 1. An electron can revolve about its nucleus only in certain special circular orbits. 2. The ordinary electron revolves about its nucleus in an invariable orbit without radiating or absorbing energy. 3. Radiation takes place when and only when the electron falls from an orbit with greater energy to one of less energy.<br><br>"In his great papers of 1913 Bohr presented his theory as being founded upon two postulates whose formulation he refined in later papers. The first postulate enunciates the existence of stationary states of an atomic system the behavior of which may be described in terms of classical mechanics; the second postulate states that the transition of the system from one stationary state to another is a nonclassical process accompanied by the emission or absorption of one quantum of homogeneous radiation whose frequency is connected with its energy by Planck's equation. As for the principle by which the possible stationary states are selected Bohr was still very far from a general formulation; indeed he was keenly aware of the necessity of extending the investigation to configurations other than the simple ones to which he had restricted himself. The search for sufficiently general quantum conditions defining the stationary states of atomic systems was going to be a major problem in the following period of development of the theory." DSB.<br><br>Also contained in the volume is Henry Moseley's famous paper "The High-Frequency Spectra of the Elements" in which he "used the method of X-ray spectroscopy devised by Braggs to calculate variations in the wave length of the rays emitted by each element. These he was able to arrange in a series according to the nuclear charge of each element. . It was now possible to base the periodic table on a firm foundation and to state with confidence that the number of elements up to uranium is limited to 92." PMM 407.<br><br>PMM 411<br>Rosenfeld Bohr Bibliography No. 6. hardcover‎

Bookseller reference : 51728

‎BOHR NIELS. THE FOUNDATION OF BOHR'S ATOMIC THEORY‎

‎On the Theory of Decrease of Velocity of Moving Electrified Particles on passing through Matter‎

‎London Taylor & Francis 1913. 8vo. Bound in one nice contemporary half calf binding with gilt leather title-label to spine. Published in "The London Edinburgh and Dublin Philosophical Magazine and Journal of Science" Vol. 25. No. 145-150 offered. Small repair to spine and blind stamped to lower part of title page. The Bohr papers: pp. 10-31. Entire volume: VIII 876 pp. 10 plates. � Bohr's seminal first work on nuclear physics being the work that lays the foundation for his atomic theory published before his "On the Constitution of Atoms and Molecules" in which he is able to conclude "that a hydrogen atom contains only 1 electron outside the positively charged nucleus and that a helium atom only contains 2 electrons outside the nucleus ." <br><br>"Bohr's 1913 paper on alpha-particles i.e. the present which he had begun in Manchester and which had led him to the question of atomic structure marks the transition to his great work also of 1913 on that same problem. While still in Manchester he had already begun an early sketch of those entirely new ideas." Pais p. 128. The present work must be considered one of the most important to the birth of modern atomic theory.<br><br>After finishing his studies in Copenhagen Bohr went to Cambridge in order to pursue his studies on electron theory under the guidance of J.J. Thompson. Thompson who was beginning to lose interest in the subject by now did however not recognize the genious of the young Bohr and as soon as he could Bohr went to Manchester where Ernest Rutherford had established a laboratory. "There from March to July 1912 working with utmost concentration he i.e. Bohr laid the foundation for his greatest achievements in physics the theory of the atomic constitution." DSB. Bohr's survey of the implications of Rutherford's atomic model had led him to attack the much harder problem which lay at the core of it namely determining the exact nature of the relation between the atomic number and the number of electrons in the atom. "Bohr obtained a much deeper insight into the problem by a brilliant piece of work which he - working as he said "day and night" - completed with astonishing speed" DSB that paper being the present "On the Theory of the Decrease of Velocity of Moving electrified Particles on passing through Matter" which thus constitutes his very first publication on the subject published immediately after this dense period of 1912 in the Philosophical Magazine of January 1913. <br><br>"The problem was one of immediate interest for Rutherford's laboratory: in their passage through a material medium alpha particles continually lose energy by ionizing the atoms they encounter at a rate depending on their velocity. Their energy loss limits the depth to which the particles can penetrate into the medium and the relation between this depth or range and the velocity offers a way of determining this velocity. What Bohr did was to analyze the ionizing process on the basis of the Rutherford model of the atom and thus express the rate of energy loss in terms of the velocity by a much more accurate formula than had so far been achieved-a formula in fact to which modern quantum mechanics adds only nonessential refinements" DSB. In the present work Bohr was thus able to conclude: "In this paper the theory of the decrease of velocity of moving electrified particles in passing through matter is given in a form such that the rate of the decrease in the velocity depends on the frequency of vibration of the electrons in the atoms of the absorbing material." as well as the seminal words that have been formative for the birth of the modern atomic theory: "Adopting Prof. Rutherford's theory of the constitution of atoms it seems that it can be concluded with great certainty from the absorption of alpha-rays that a hydrogen atom contains only 1 electron outside the positively charged nucleus and that a helium atom only contains 2 electrons outside the nucleus ". Bohr continues: "These questions and some further information about the constitution of atoms which may be got from experiments on the absorption of alpha-rays will be discussed in more detail in a later paper." pp. 30-31 of the original paper - the last sentence referring directly to his three part "On the Constitution of Atoms and Molecules" in which he went on to present his postulates of the orbital structure of the electrons and their quantized radiation. <br><br>Rosenfeld Bohr Bibliography No. 5. Rosenfeld Dictionary of Scientific Biography II pp. 240-41. Pais Niels Bohr's Times pp. 117-31. hardcover‎

Bookseller reference : 51729

‎BOHR NIELS. & LEON ROSENFELD. + LEV LANDAU & RUDOLF PEIERLS. QUANTUM FIELD THEORY‎

‎Three papers 1. Zur Frage der Messbarkeit der elektomagnetischen Feldgr�ssen. 2. Erweiterung des Unbestimmtheitsprinzips f�r die relativistische Quantentheorie. 3. Field and Charge Measurements in Quantum Electrodynamics.‎

‎Copenhagen Levin & Munksgaard 1933. Berlin Springer 1931. Lancaster American Physical Society 1950. First paper: Published as no. 8 of vol. 12 in 'Kgl. Dankse Vid. Selsk. Math.-Fys. Medd.'. 8vo. Original printed wrappers. With the ownership signature of Danish physicist Mogens Pihl Prof. of physics at Copenhagen University 1957-77. 651 pp. <br>Second paper: Published in 'Zeitschrift f�r Physik' vol. 69 pp.56-69. The entire volume in contemporary half cloth offered here.<br>Third paper: Published in 'The Physical Review' vol. 78 no. 6 pp.794-798. The entire issue in original printed wrappers offered here. With rubber stamp of Danish physicist Christian M�ller Author of "The Theory of Relativity 1952". � First editions of these fundamental papers in the development of quantum field theory. The process of measuring electromagnetic fields involves the observation of charged test bodies in those fields. Therefore the theory of electrodynamics is an inseparable extension of mechanics. A quantum theory of fields thus inherits in some form the limitations of measurement which lie at the foundation of quantum mechanics. In 1931 Landau and Peierls published a critical analysis of the consequences of such limitations in a relativistic quantum theory of fields second paper offered. Landau and Peierls came to the negative conclusion that in several cases the concept of momentum was without physical meaning and quantities such as the strength of a field was un-measurable. In their famous paper from 1933 Bohr and Rosenfeld first paper offered carefully reviewed the arguments of Landau and Peierls and showed through the use of particular measuring arrangements that a consistent quantum theory of fields is possible without further limitations than the ones which secure the consistency of quantum mechanics. The BR-paper is often credited with having laid the foundation for quantum electrodynamics. Bohr continued his work in this field and in 1937 he completed a manuscript entitled "Field and Charge Measurement in Quantum Theory" but this was never published. When in the late 1940s the important work on QED by Tomonaga Schwinger Dyson and Feynman appeared in The Physical Review Bohr and Rosenfeld again joined and published the essentials of the 1937 manuscript in the same journal third paper offered.<br><br>See Abraham Pais: Bohr's Times pp.358-364. Mehra & Rechenberg: The Historical Development of Quantum Theory vol. 6 pp.697-703. Collected Works of Niels Bohr vol. 7 pp.3-33. hardcover‎

Bookseller reference : 35750