‎The Effect of Magnetization on the Nature of light Emitted by a Substance. - [THE ZEEMAN-EFFECT - NOBEL PRIZE IN PHYSICS 1902]‎

‎London, Macmillan & Co, 1896-97. Royal8vo. Bound in later half cloth with gilt lettering to spine. In ""Nature"", Vol. 55, November 1896 - April 1897. Bookplates to front free end-papers and library stamp to title page. Minor wear to extremities, otherwise very fine and clean. P. 347. [Entire volume: XL, 624 pp.].‎

‎First English edition of this landmark paper in which the Zeeman-effect was first announced. It is one of the most important and influential discoveries made in the later half of the 19th century. ""The Zeemann effect not only opened a new world of facts which interest the physicist, the chemist, and even the astronomer, but the study also contributed - to an extent much greater than the study of the Stark effect - to the conceptual development of quantum theory"" (Jammer). Together with Lorenz, Zeeman was awarded the Nobel Prize in Physics for ""the extraordinary service they rendered by their researches into the influence of magnetism upon radiation phenomena"". ""The last experiment performed by Michael Faraday was an unsuccessful attempt to observe the influence of a magnetic field on the spectral lines of sodium. More than 30 years later, Pieter Zeeman took up the challenge and observed a broadening of the lines, which was soon recognized to be the splitting that we know as the Zeeman effect. Zeeman's account of the discovery, translated for Nature from the Proceedings of the Physical Society of Berlin, includes an interpretation based on Hendrik Lorentz's idea of ""small molecular elements charged with electricity"", and a rough calculation of the charge to mass ratio of these ""ions""."" (Nature Physics Portal).""Zeeman is best remembered for his observations in 1896 of the mageto-optic phenomenon that almost immediately was named the Zeeman effect. His experimental discovery was not fortuitous, but the fruition of theoretical views that had motivated attempts over a span of thirty-five years to detect some such interaction between magnetism and light. Zeeman's initial observations were beautifully comprehended by H.A.Lorentz' electromagnetic theory, which also served to guide Zeeman in the very early refinement and extension of his discovery. As a result Zeeman and Lorentz shared the 1902 Nobel Prize for physics in recognition of their accomplishment and of the promise, since overwhelmingly fulfilled, of the Zeeman effect for contributing to the understanding of spectra and the particulate structure of matter."" (DSB).‎

‎Lignes doubles et triples dans le spectre, produites sous l'influence d'un champ magnetique exterieur.‎

‎(Paris, Gauthier-Villars), 1897. 4to. No wrappers. In: ""Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences"", Tome 124, No 25. Pp. (1407-) 1486. (Entire issue offered). Zeeman's paper: pp. 1444-1445.‎

‎First French version of this importent paper in which Zeeman observed for the first time the splitting of the spectral lines into doublets and triplets. Here we have the first appearance of a charged particle much lighter than an atom, the first glimpse at the electron.""In the spring of 1897, after his move to the University of Amsterdam, Zeeman resolved a magnetically ""broadened"" spectral line into the triplet of distinct polarized components that the Lorentz theory predicted for a sufficiently intense magnetic field. This in a very real sense was the peak of the Zeeman-Lorentz investigation of the Zeeman effect.""(DSB).‎

‎Mesures relatives au Phénomène de Kerr, dans la Réflexion polaire sur le Fer, le Cobalt et le Nickel se rapportant en particulier à la Différence de Phase Magnéto-Optique de Sissingh. (Mémoire couronné par la Société Hollandaise des Sciences à Harlem)...‎

‎Harlem, Les Heritieres Loosjes, 1894. Lex8vo. Orig. printed wrappers. Wrapper frayed at edges loosing some small pieces. A faint stamp on frontwrapper. In ""Archives Néerlandaises des Science Exactes et Naturelles. Redigée par J. Bosscha"", Tome XXVII. (Entire volume offered). VIII,438 pp. and 7 lithographed plates. Zeeman's paper: pp. 252-302. Sissingh's paper: pp. 173-251. Uncut and unopened.‎

‎First edition of Zeeman's PhD by which he furthermore won the gold medal of the Netherlands Scientific Society of Haarlem in 1892 .In 1902 Lorentz and Zeeman shared the Nobel Prize in physics.‎

‎Der Aether im Lichte der klassischen Zeit und der Neuzeit. ‎

‎Tübingen, H. Laupp, 1933, in-8vo, 76 S., ‘Mr. Prof. Dr. M. Lugeron. Hommage ms. de l'auteur’ auf dem Titelbl., Original-Broschüre.‎

‎Aus Vorlesungen, gehalten im Sommersemester 1932 und Wintersemester 1932/33 an der Universität Basel, wo Ludwig Zehnder Prof. der Physik war. ‎

‎Microscopes et appareils auxiliaires. 33e édition 1906.‎

‎ 1906 Paris, 1906, grand in 8° relié pleine percaline verte de l'éditeur, 114 pages ; nombreuses figures. ‎

‎Bel exemplaire. ...................... Photos sur demande .......................... ‎

‎PRINCIPIEN EINER ELEKTRODYNAMISCHEN THEORIE MATERIE‎

‎BON EXEMPLAIRE‎

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‎In 4° (215 x 270 mm) Cartonnage éditeur, manque dos CXXVIII pp – 444 pp Illustré de 4 planches H.T. In fine‎

‎LES CELLULES PHOTO ELECTRIQUES ET LEURS APPLICATIONS‎

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‎Traduit de l'anglais par MALGORN G. In 8° demi percale, 6pp, 177pp, figures dans le texte Première édition française Zworykin, ingénieur américain d'origine russe (1889-1982) fut l'assistant de Boris ROSING qu'il aida dans ses expériences de télévision cathodique. Puis il entreprit à Paris, au Collège de France, des recherches sur les rayons X sous la direction de Paul LANGEVIN. En 1919, il s'installa aux Etats unis. En 1929, il entre à la Radio Corporation of America dont il devint directeur des recherches. Zworykin est l'inventeur , en 1934, de l'iconoscope, le premier d'une longue lignée de tubes électroniques analyseurs d'image qui feront faire à la télévision des progrès considérables. Introduction historique- théorie générale ( énergie radiante, effet photo-émissif)- Caractéristiques mécaniques- Méthodes générales de préparation des cellules photo-voltaïques- Le circuit de la photocellule et le radio-tube- Le problème d'amplification- La photocellule et le cinéma sonore- La photocellule et la transmission des images- La photocellule et la télévision- Applications diverses- Les photocellules dans l'avenir.‎

‎Über die physikalischen Beziehungen zwischen hydrodynamischen und elektrodynamischen Erscheinungen, und die Widerlegung des elementaren Potentialgesetzes von Helmholtz durch elektrodynamische Versuche mit geschlossenen Strömen.‎

‎Leipzig, 1876, in-8vo, 3 Bl. + S. (59)-239 + 3 lith. (1 gef.) Figurentafeln (Apparate und Versuche), Original-Broschüre, Bibl.-Stempel auf Umschlag.‎

‎Separat-Abdruck aus den Berichten der Königl. Sächs. Gesellschaft der Wissenschaften zu Leipzig. Sitzung am 12. Febr. 1876.Zöllner war Prof. der Physikal. Astronomie in Leipzig und einer der Pioniere der Astrophysik. DSB XIV/627-630; Poggendorff III/1488-1489, IV/1694. ‎

‎Mémoire sur la propagation de la Chaleur dans les Corps.‎

‎(Upsal, C.A. Leffler, 1860). 4to. Orig. printed wrappers. Extracted from ""Actes de la Soc. Roy. des Sciences d'Upsala"", Series 3ieme. T. III. Pp. (51-) 72. This extract has the orig. printed wrappers from Tome III.‎

‎First edition of Ångström's importent paper on the transformation of heat through materials. Angstrom determined the conductivity of the material of a bar by periodically heating and cooling it. The bar was heated and cooled periodically by passing steam and water at regular intervals through a chamber at one end of the bar ... In this way, the temperature at points along the bar fluctuate periodically and on account of surface radiation the temperature amplitude diminishes as the distance from the region of supply increases.In 1868, Ångström created a spectrum chart of solar radiation that expresses the wavelength of electromagnetic radiation in the electromagnetic spectrum in multiples of one ten-millionth of a millimetre, or 1×10-10 metres. This unit of length later became known as the ångström, Å.‎

‎Recherches sur les spectres métalloïdes. Avec deux Planches.‎

‎Upsala, Berling, 1875. Uncut in original printed wrappers. The entire volume of ""Nova Acta Regiæ Societatis Scient. Upsaliensis."" Seriei Tertiæ. Vol. IX, Fasc. II. The memoir: 34 pp. and 2 large folded plates.‎

‎First printing.""A work on the spectra of the metalliods, which was begun some years previously, was completed by Tobias Robert Thalén, who actively assisted Ångström for many years, and was published in 1875. In opposition to the view that a given chemical element had a multiplicity of spectra, depending upon conditions, Ångström remained a strong defender of the opinion that each chemical element had a single characteristic spectrum that remained essentially unchanged."" (DSB).‎

‎Mémoire sur la propagation de la Chaleur dans les Corps.‎

‎Upsal, C.A. Leffler, 1860. 4to. Uncut and unopened. Offprint from ""Actes de la Soc. Roy. des Sciences d'Upsala"", Series 3ieme. T. III. (2),22 pp.‎

‎First edition of Ångström's importent paper on the transformation of heat through materials. Angstrom determined the conductivity of the material of a bar by periodically heating and cooling it. The bar was heated and cooled periodically by passing steam and water at regular intervals through a chamber at one end of the bar ... In this way, the temperature at points along the bar fluctuate periodically and on account of surface radiation the temperature amplitude diminishes as the distance from the region of supply increases.In 1868, Ångström created a spectrum chart of solar radiation that expresses the wavelength of electromagnetic radiation in the electromagnetic spectrum in multiples of one ten-millionth of a millimetre, or 1×10-10 metres. This unit of length later became known as the ångström, Å.‎

‎Försök till en mathematisk Theorie för det Thermometriska värmet. Akademisk Afhandling. Part I-VI (all issued).‎

‎Uppsala, Wahlström & C., 1848-54. 4to. Sewn as issued. Uncut. (2),16,(2),17-24,(2),25-32,(2),33-40,(2),41-48 pp.‎

‎First edition of Ångström's early work on thermometrical phenomena.Ångström was one of the early formulators of the science of modern spectroscopy he wrote extensively on terrestrial magnetism, the conduction of heat, and especially spectroscopy. He published a monumental map of the normal solar spectrum that expressed the length of light waves in units of one ten-millionth of a millimeter, a unit of length now known as the angstrom. He discovered that hydrogen is present in the sun's atmosphere, and he was the first to examine the spectrum of the aurora borealis.‎

‎Om de monoklinoedriska kristallernas molekulära konstanter. Inlemnad d. 7 Mars 1851.‎

‎Stockholm, (1851). Uncut in orig. blue blank wrappers. Wrappers a bit frayed.Offprint from ""Kungl. Svenska Vetenskaps Akademiens handlingar"". 1850. II. Pp. (425-)461 a. 2 plates. Wrappers and plates loose.‎

‎First editon. Importent pioneer work in crystallography. The papers topic is the exact nature of the relation between the various axes of a crystal, the axes of figure, of elasticity, of electrical conductivity, the thermal, the optic, and the magnetic axes.‎

‎De Theoria Lucis Calorisque Dissertatio. (Pars I-II).‎

‎Uppsala, Regiae Academiae Typographi, 1839. Small 4to. Sewn as issued, uncut. (4),1-10,11-20 pp. Fine and clean. Printed on thick blue paper.‎

‎First edition of Ångströms scarce doctoral dissertation, dealing with the optics of conical refraction.Ångström was one of the early formulators of the science of modern spectroscopy he wrote extensively on terrestrial magnetism, the conduction of heat, and especially spectroscopy. He published a monumental map of the normal solar spectrum that expressed the length of light waves in units of one ten-millionth of a millimeter, a unit of length now known as the angstrom. He discovered that hydrogen is present in the sun's atmosphere, and he was the first to examine the spectrum of the aurora borealis.‎

‎Mindetale over det kongelige danske Videnskabernes Selskabs Præses...Herr Ernst Heinrich Greve Schimmelmann...holden i Selskabets Möde den 14de Juli 1831.‎

‎Kbhvn., Popp, (1831). Orig. blankt kardusomslag. 39 pp.‎

‎Originaludgave.‎

‎Mindetale over det kongelige Videnskabernes Selskabs Præses... Herr Ernst Heinrich Greve af Schimmelmann... holden i Selskabets Möde den 14de Juli 1831.‎

‎Kjöbenhavn, Poppske Trykkerie, (1831). Orig. blåt blankt omslag. 39 pp.‎

‎Originaltrykket.‎

‎Naturlærens mechaniske Deel.‎

‎København, C.A. Reitzel, 1844. Samt. hldrbd. med rig rygforgyldning. Ryg med brugsspor og hjørner stødte. XXII,360,(2) pp. Talrige tekstillustrationer i træsnit. Her og der brunplettet og de første sider med mindre skjold i indre hjørner.‎

‎Originaludgaven af Ørsteds lærebog.‎

‎Naturlærens mechaniske Deel. Tredie udgave ved C. Holten.‎

‎Kjøbenhavn, Reitzel, 1859. Samt. halvlæder. Lidt brunplettet. XVI,329 pp. Med talrige figurer i teksten.‎

‎Naturlærens mechaniske Deel. Tredie udgave ved C. Holten.‎

‎Kjøbenhavn, Reitzel, 1859. Samt. halvlæder. Rygforgyldning. Stempler på titelbladet. XVI,329 pp. Med talrige figurer i teksten. Indvendig ren.‎

‎Aanden i Naturen. 2 bd. (The Spirit in Nature. 2 Volumes). - [ØRSTED'S MAIN WORK ON NATURAL PHILOSOPHY]‎

‎Kjøbenhavn (Copenhagen), Andr. Fred. Høst, 1850. 8vo. Bound in a beatiful later half-morocco binding with richly gilt spine. (Anker Kysters Eftf. 1971). Spine slightly faded. Scattered brownspots, otherwise internally clean. Printed on vellum paper. X,190"XII,206 pp.‎

‎First edition of Oersted's main work on natural philosophy. Oersted is universally known for his discovery of Electro-Magnetism in 1820. Afterwards he went on to write a number of important philosophical works on natural philosophy and empiricism, of which he considered ""Aanden i Naturen"" as his main work. The work is found printed on 2 sorts of paper, common- and vellum paper, the present copy being on vellum. Both Hans Christian Andersen and Søren Kierkegaard admit to having been influenced by the writings of Oersted. ""He was an enthusiastic follower of the ""Naturphilosophie"" school in Germany, whose main object was the unification of physical forces, thus producing a monistic theory of the universe. It was to further this purpose that Oersted sought in actual phenomena the electro-magnetic identity of which he had already convinced himself on metaphysical grounds"" (Percy H. Muir in Printing and The Mind of Man). The copy once belonged to the renowned Danish book collector Gustav Philipsen (1853-1925) and carries his exlibris.‎

‎Indsendt. Ved nogle Forsøg, som jeg i Vinter anstillede i mine Forelæsninger over Electricitet, Galvanismus og Magnetismus ....Lagdes en tynd Traad eller Strimmel af Platin, Messing, Bly, Tin eller Jern parallelt med Magnetnaalen... H.C. Ørsted. (i. e... - [THE VERY FIRST ANNOUNCEMENT OF THE DISCOVERY OF ELECTROMAGNETISM]‎

‎Kiøbenhavn, Andreas Seidelin, 1820. 8vo. In contemporary brown half calf with lighter brown leather title-label with gilt lettering. All edges coloured in blue. In: ""Dansk Litteratur = Tidende for Aaret 1820"". (The entire volume 1820 present, comprising all 52 issues, numbered 1-52). Light wear to extremities, spine with a few scratches. With occassional brownspotting, primarily affecting first and last leaves, but generally nice and clean. (Entire volume:) X, 822 pp. (Oersteds paper's in issue no. 28:) pp. 447-448. ‎

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‎The exceedingly rare very first announcement of H. C. Ørsted’s landmark discovery of electromagnetism, predating his famous “Experimenta”-paper by at least a week. Publishing the present brief note allowed him to quickly claim priority for his discovery, which ensured that his work would be recognized and attributed to him before others potentially stole his discovery. The importance of the discovery of electromagnetism, one of the most pivotal moments in the history of science, can hardly be overestimated. Here, Ørsted laid both the theoretical and practical foundation for future works of Faraday, Maxwell, and Hertz. The offered paper was published in the 28th week of July, 1820 (No. 28 of the periodical), which means that it was published some time between July 11 and July 16, probably the 11th or 12th. The paper which made Oersted famous all over Europe was his Latin pamphlet ""Experimenta circa effectum conflictus electrici in acun magneticam. Hafniæ, 1820"", dated July 21, 1820. The Latin “Experimenta” was sent on the same day (according to Kirstine Meyer in ""Scientific Life and Works of H.C. Ørsted"") to learned bodies and scholars in all European countries. The communication offered here (in Danish) was published at least a week before ""Experimenta"". The essence of Oersted's discovery is detailed in the paper offered here, where he describes how the magnetic effect of an electric current-carrying wire was initially observed using an incandescent platinum wire. He then extended his experiments to non-incandescent wires made from various materials noting that the magnetic effect was influenced by the wire's dimensions. Among Oersted's papers (now in the holding of the Danish Royal Library), we have both a draft written in his own hand on acid-stained paper and a nearly identical version in another handwriting. These experimental notes form the basis of the present paper (which Kirstine Meyer refers to as ""Supplement II""). In Supplements III and IV (dated July 15 and 21), Oersted further elaborates on his experiments with the wire in different positions relative to the magnet which became his “Experimenta”-paper. “Electromagnetism itself was discovered in the year 1820, by Professor Hans Christian Oersted, of the University of Copenhagen. Throughout his literary career, he adhered to the opinion, that the magnetical effects are produced by the same powers as the electrical. He was not so much led to this, by the reasons commonly alleged for this opinion, as by the philosophical principle, that all phenomena are produced by the same original power. … His researches upon this subject, were still fruitless, until the year 1820. In the winter of 1819–20, he delivered a course of lectures upon electricity, galvanism, and magnetism, before an audience that had been previously acquainted with the principles of natural philosophy. In composing the lecture, in which he was to treat of the analogy between electricity and magnetism, he conjectured, that if it were possible to produce any magnetical effect by electricity, this could not be in the direction of the current, since this had been so often tried in vain, but that it must be produced by a lateral action. This was strictly connected with his other ideas" for he did not consider the transmission of electricity through a conductor as an uniform stream, but as a succession of interruptions and reestablishments of equilibrium, in such a manner that the electrical powers in the current were not in quiet equilibrium, but in a state of continual conflict.… The plan of the first experiment was to make the current of a little galvanic trough apparatus, commonly used in his lectures, pass through a very thin platina wire, which was placed over a compass covered with glass. The preparations for the experiments were made, but some accident having hindered him from trying it before the lecture, he intended to defer it to another opportunity yet during the lecture, the probability of its success appeared stronger, so that he made the first experiment in the presence of the audience. The magnetical needle, though included in a box, was disturbed but as the effect was very feeble, and must, before its law was discovered, seem very irregular, the experiment made no strong impression on the audience [“Thermo-electricity,” in Edinburgh Encyclopaedia (1830), XVIII, 573–589" repr. in Oersted’s Scientific Papers, II, 356]. “We have now reached the spring of 1820. Ørsted understood that the “feeble” disturbance of the compass needle seen in his lecture demonstration was a genuinely important discovery. Other duties prevented a more detailed and quantitative investigation of this effect until the beginning of July 1820. Ørsted had new laboratory facilities and a more powerful galvanic apparatus that facilitated his measurements. Confident that his experiments would have a successful outcome, he gathered a group of six distinguished observers who would serve as witnesses of his experiments. (Their names and credentials were duly noted in the written description of his investigations.) He set about an exhaustive series of measurements aimed at documenting how the distance and orientation of a current-carrying wire affected the deflection of a compass needle. He made copious notes and drawings, many of which can be seen in Det Kongelige Bibliotek in Copenhagen. ” (Karen Jelved & Andrew D. Jackson, H. C. Ørsted and the Discovery of Electromagnetism, 2019). But before the above mentioned Latin paper was published - which within the same year was reprinted in England, France, Germany and Italy - Oersted made sure to secure his discovery and consequently eternal fame by publishing the present paper.OCLC only list three copies (Danish Royal Library, Houghton, Harvard, USA & British Library). Bibliotheca Danica IV: 535 (The periodical was published from 1811-36). Erslew ""Almindeligt Forfatterlexicon"", Bd. III, p. 688. (Dibner 61, PMM 282, Horblitt 3 b, Sparrow 152, Norman 1606 - all 4 only recording the later ""Experimenta"").‎

‎Naturvidenskabelige Skrifter. Samlet Udgave med to Afhandlinger om hans Virke ved Kirstine Meyer./ Scientific Papers. Collected Edition with two Essays on his Work by Kirstine Meyer. 3 vols. Copenhagen, 1920.‎

‎4to. Bound in 3 solid private hcloth. CLXVI,345,593,420 pp., 3 portraits, plates and textillustrations.‎

‎Naturvidenskabelige Skrifter. Samlet Udgave med to Afhandlinger om hans Virke ved Kirstine Meyer./ Scientific Papers. Collected Edition with two Essays on his Work by Kirstine Meyer. 3 vols. ‎

‎Copenhagen, Thieles, 1920. 4to. Uniformly bound in three recent blue full cloth bindings. A nice and clean set. CLXVI,344, (4) pp. 593, (4) pp. CLXVI, 420 pp., 3 portraits, plates and textillustrations.‎

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‎Videnskaben om Naturens Almindelige Love. Første Bind (alt som udkom). (The Science of the General Laws of Nature. First volume [all that was published]).‎

‎Kjøbenhavn (Copenhagen), Fr. Brummer, 1809. Beskedent samtidigt hshirtbd. Permer løse. Brugsspor, her og der brunplettet. En del blade med svag fugtskjold. XXX,378 pp. samt 11 kobberstukne plancher. Ydremargin af plancher med brugsspor.‎

‎Originaltrykket af Ørsteds første bog, som er meget sjældent forkommende. Scarce first edition of Hans Christian Oersted's first printed book (The Science of the General Laws of Nature). Oersted is universally known for his discovery of the Electro-Magnetism in 1820. In this his first printed book, Oersted proposes at least three theses that he were to follow for the rest of his life, and which he made the foundation for his discovery of Electro-Magnetism: the crucial role that experiments and thereby empiricism play in the perception of nature the fact that each individual phenomenon in nature in accordance with the philosophy of nature must be understood as a whole" and that the laws of nature are the same everywhere, in the smallest and in the greatest parts of the universe. The sort of philosophy of nature that Oersted studies and develops is by him comprehended as a product of human striving towards with its reason to ""include and penetrate the entire nature, and to explain it in its full context"" (from ""Science of the General Laws of Nature"" - own translation), which is why this philosophy is also the science of the general laws of nature (that are the same everywhere). It thus not only includes the science of movement, but also that of electricity, magnetism, light, warmth, and chemical connections, such as they all follow directly from ordinary forces of nature, and Oested's discovery in 1820 of the connection between magnetism and electricity must be seen in this connection.Both H.C. Andersen and Søren Kierkegaard admit to having been influenced by the writings of Oersted. ""He was an enthusiastic follower of the ""Naturphilosophie"" school in Germany, whose main object was the unification of physical forces, thus producing a monistic theory of the universe. It was to further this purpose that Oersted sought in actual phenomena the electro-magnetic identity of which he had already convinced himself on metaphysical grounds"" (Percy H. Muir in Printing and The Mind of Man). ‎

‎Videnskaben om Naturens almindelige Love. Første Bind (alt som udkom). (The Science of the General Laws of Nature. First volume (all published).‎

‎Kjøbenhavn (Copenhagen), Fr. Brummer, 1809. Cont. hcalf. Gilt spine. Titlelabel with gilt lettering. A paperlabel pasted on top of spine. Stamps on title-page. XXX,378 pp. and 11 engraved plates with many figs. A fine copy. ‎

‎Scarce first edition of Hans Christian Oersted's first printed book (The Science of the General Laws of Nature). Oersted is universally known for his discovery of the Electro-Magnetism in 1820. In this his first printed book, Oersted proposes at least three theses that he were to follow for the rest of his life, and which he made the foundation for his discovery of Electro-Magnetism: the crucial role that experiments and thereby empiricism play in the perception of nature the fact that each individual phenomenon in nature in accordance with the philosophy of nature must be understood as a whole" and that the laws of nature are the same everywhere, in the smallest and in the greatest parts of the universe. The sort of philosophy of nature that Oersted studies and develops is by him comprehended as a product of human striving towards with its reason to ""include and penetrate the entire nature, and to explain it in its full context"" (from ""Science of the General Laws of Nature"" - own translation), which is why this philosophy is also the science of the general laws of nature (that are the same everywhere). It thus not only includes the science of movement, but also that of electricity, magnetism, light, warmth, and chemical connections, such as they all follow directly from ordinary forces of nature, and Oested's discovery in 1820 of the connection between magnetism and electricity must be seen in this connection.Both H.C. Andersen and Søren Kierkegaard admit to having been influenced by the writings of Oersted. ""He was an enthusiastic follower of the ""Naturphilosophie"" school in Germany, whose main object was the unification of physical forces, thus producing a monistic theory of the universe. It was to further this purpose that Oersted sought in actual phenomena the electro-magnetic identity of which he had already convinced himself on metaphysical grounds"" (Percy H. Muir in Printing and The Mind of Man). ‎