‎Fiacre‎

‎Odom, Mel; Massett, Patrick; Zinman, John; West, Simon‎

‎Tomb Raider‎

‎Aladdin 2001-06-01. paperback. New. In shrink wrap. Looks like an interesting title! Aladdin paperback‎

書籍販売業者の参照番号 : Q-0743423011 ISBN : 0743423011 9780743423014

‎Odrowski, Simon‎

‎Text Mining durch die politikwissenschaftliche Brille: Neue Ansätze für eine sozialwissenschaftliche Erschließung von Big Text Data Globale . internationale Beziehungen German Edition‎

‎paperback. Good. Access codes and supplements are not guaranteed with used items. May be an ex-library book. paperback‎

書籍販売業者の参照番号 : 3658460423.G ISBN : 3658460423 9783658460426

‎Odum, Howard W; Simon, Bryant [Editor]‎

‎Race and Rumors of Race: The American South in the Early Forties‎

‎Johns Hopkins University Press 1997-08-20. Paperback. New. In shrink wrap. Looks like an interesting title! Johns Hopkins University Press paperback‎

書籍販売業者の参照番号 : Q-0801857570 ISBN : 0801857570 9780801857577

‎Oerding, Simon‎

‎Global Governance and the United Nations‎

‎paperback. Good. Access codes and supplements are not guaranteed with used items. May be an ex-library book. paperback‎

書籍販売業者の参照番号 : 3656722722.G ISBN : 3656722722 9783656722724

‎Oerding, Simon‎

‎Why do democratic states not fight each other A systemic approach to the democratic peace‎

‎paperback. Good. Access codes and supplements are not guaranteed with used items. May be an ex-library book. paperback‎

書籍販売業者の参照番号 : 3656721858.G ISBN : 3656721858 9783656721857

‎Oertel, Simon‎

‎Do German Capital Markets React When Corporate Insiders Exercise Stock Options‎

‎paperback. Good. Access codes and supplements are not guaranteed with used items. May be an ex-library book. paperback‎

書籍販売業者の参照番号 : 3640332512.G ISBN : 3640332512 9783640332519

‎Officer of the Colombian Navy. Bolivar Simon‎

‎Relato de un oficial ingles sobre la Guerra a Muerte. Recollection of a service of three years during the War of Extermination by an officer of the Colombian Navy 1828‎

‎Caracas: Ediciones Centauro 1977. Second edition. Black paper wrappers titled in yellow. About very good rubbing on wrappers last signature separated. 349 pp. 16mo. Translation of: Recollections of a service of three years during the war-of-extermination in the republics of Venezuela and Colombia by an officer of the Colombian Navy London Hunt & Clarke 1828. First published in 1945 in Buenos Aires by Editorial Colombia and translated by Maria Betancourt de Caceres an edition nearly impossible to find. Scarce. OCLC locates only seven copies of this edition and one two of the 1945 version. Ediciones Centauro unknown books‎

書籍販売業者の参照番号 : 43381

‎Ogden, Simon Paul‎

‎The Feldenkrais Method for Executive Coaches Managers and Business Leaders Routledge Focus on Mental Health‎

‎hardcover. Good. Access codes and supplements are not guaranteed with used items. May be an ex-library book. hardcover‎

書籍販売業者の参照番号 : 113823091X.G ISBN : 113823091X 9781138230910

‎Oger, Cécile. - Simon, Stéphanie. - Thirion, Paul.‎

‎Empreintes. Patrimoine écrit, témoin de l’histoire.‎

‎Liège, Presses Universitaires de Liège 2018, 285x240mm, 167pages, reliure d'éditeur. Exemplaire à l'état de neuf.‎

‎richement illustré, Pour un paiement via PayPal, veuillez nous en faire la demande et nous vous enverrons une facture PayPal‎

書籍販売業者の参照番号 : 84634

‎Ohm Georg Simon‎

‎Bestimmung des Gesetzes nach welchem Metalle die Contactelektricität leiten nebst einem Entwurfe zu einer Theorie des Voltaischen Apparates und des Schweiggerschen Multiplicatorsi‎

‎Halle: Journal für Chemie und Physik. 1st Edition. Hardcover. Good. FIRST EDITION of the experimental proof of Ohm's law "the fundamental law of electric circuits" Dibner 63. Ohm "made a study of the laws of galvanic currents and while investigating the relative conductivity of metals finally discovered the relation known as 'Ohm's law' which underlies all electrical theory and measurement. The experimental proof of this law was first published in a paper in Schweigger's Journal fur Chemie und Physik vol. xlvi. 1826 under the title of Bestimmung des Gesetzes nach welchem Metalle die Contactelektricität leiten" Peck and Colby The New International Encyclopedia. "The following year Ohm published a book entitled Die Galvanische Kette mathematisch bearbeitet Berlin 1827. It contained a theoretic deduction of Ohm's law and became far more widely known than his article of 1826 giving the experimental deduction. In fact his experimental paper was so little known that the impression long prevailed and still exists that he based his law on theory and never established it empirically. This misapprehension accounts perhaps for the unfavourable reception of Ohm's conclusions" Cajori A History of Physics. In: Journal für Chemie und Physik. Hrsg. v. J. S. C. Schweigger u. W. Schweigger-Seidel vol. 46 pp. 137-166. Halle: 1826. The whole volume offered. Octavo modern cloth. Some dampstaining throughout; occasional browning. Provenance: with library and de-accession stamps on series title from the prestigious Gmelin Institute after 1996 part of the Max Planck Institute. Journal für Chemie und Physik hardcover books‎

書籍販売業者の参照番号 : 253

‎OHM Georg Simon 1789 1854‎

‎Partly-Printed Document Signed‎

‎Munich: University of Munich 1851. unbound. very good. Exceedingly rare partly-printed document signed: 1 page folio Munich August 17 1851 an ornate Graduation Certificate for a student attending the University of Munich Polytechnic School signed 'Prof. Dr. Ohm' as the Royal Ministerial Commissioner for Examinations. Fine dark signature and in very good condition with some tiny tears along the right blank margin. Accompanied by a small black and white portrait of Ohm on a separate sheet. At the time he signed this certificate Ohm was also Extraordinary Professor of Physics at the University of Munich.<br/><br/> German physicist and mathematician whose experiments using Alessandro Volta's new electrochemical cell led to his discovery of Ohm's Laws.<br/><br/> University of Munich unknown books‎

書籍販売業者の参照番号 : 288814

‎OHM (Georg Simon) et DU MONCEL (Théodose Achille Louis )‎

‎Théorie mathématique des courants électriques [ET] Études des lois des courants électriques [ET] Notice sur l'appareil d'induction électrique de Ruhmorff‎

‎Paris, L. Hachette & Mallet-Bachelier, 1860 et 1859, in-8, [4]-202-[6]-X-201-[8]-X-[2]-400 pages, demi-basane fauve à coins postérieure, dos à 5 nerfs, Intéressant regroupement de trois oeuvres majeures dans l'histoire des théories sur l'électricité : la première édition française des lois d'Ohm, le texte le plus important de Du Moncel sur l'application pratique des lois électriques, et une quatrième édition de son introduction à la bobine de Ruhmkorff, un générateur électrique qui révolutionna les expériences électriques au milieu du XIXe siècle. En 1827, Georg Simon Ohm (1789-1854), dans Die galvanishe Kette, mathematisch bearbeitet établit les lois fondamentales du courant électrique : loi de la longueur, loi de la section et loi des courants dérivés, aujourd'hui plus généralement connue sous nom de loi d'Ohm. L'édition française, publiée 23 ans après l'édition originale allemande fut donnée par Jean-Mothée Gaugain. Le premier texte de Du Moncel, inventeur prolifique d'appareils électriques et un des premiers et meilleurs vulgarisateurs français sur le sujet, débute par une exposition des lois d'Ohm. Son second texte, ici en quatrième édition (la première avait paru en 1855) constitue, à l'époque, une étude particulièrement précoce sur la bobine que Ruhmkorff inventa en 1851. L'ouvrage est richement illustré. Bon exemplaire de ce recueil historique intéressant, portant sur le premier contreplat, l'ex-libris de James Boyd Gilmore, et le cachet, annulé, de l'Institut Catholique de Paris. Couverture rigide‎

‎Bon [4]-202-[6]-X-201-[8]-X-[2]-40‎

書籍販売業者の参照番号 : 62421

‎Ohm, Georg Simon‎

‎Bestimmung des Gesetzes nach welchem Metalle die Contaktelectricität leiten nebst einem Entwurfe zu einer Theorie des Voltaischen Apparates und des Schweigerschen Multiplcators pp.137-166.‎

‎1826. Schweigger's Journal 46. - Halle in der Expedition des Vereins zur Verbreitung von Naturkenntnis 1826 8° XVI 566 pp. 3 Taf. Pappband der Zeit; feines Exemplar. FIRST EDITION of the experimental proof of Ohm's law "the fundamental law of electric circuits". From 1825 onwards Georg Simon Ohm 1789-1854 "delved into the phenomena of galvanic current which were particularly topical and puzzling at the time and searched for quantitative relationships between the quantities "resistance" "voltage" and "amperage". After he had initially been deceived by the then not yet constant current of the chemical batteries he found the correct correlation in 1826 with a thermocouple in which the current is generated by temperature differences in a pure metal conductor circuit which later became known as "Ohm's law". This law was particularly groundbreaking for the development of electrical measurement technology and power current technology. It states - in modern formulation - that the electrical voltage is equal to the product of current intensity and resistance. Ohm himself used it to explain various phenomena in the electric circuit such as the influence of measuring instruments. He also formulated the current branching laws now named after Gustav Kirchhoff 1824-87. In 1827 in a detailed paper he attempted to derive his experimental results in purely theoretical terms as part of an overall concept of electrical conduction. To do this he used the analogy with the heat conduction theory of the Frenchman Joseph Fourier 1768-1830. This led to the long-standing misunderstanding that Ohm had not discovered his law experimentally. " Jürgen Teichmann NDB 19 1999 pp. 489-491 Ohm "made a study of the laws of galvanic currents and while investigating the relative conductivity of metals finally discovered the relation known as 'Ohm's law' which underlies all electrical theory and measurement. The experimental proof of this law was first published in a paper in Schweigger's Journal fur Chemie und Physik vol. xlvi. 1826 under the title of Bestimmung des Gesetzes nach welchem Metalle die Contactelektricität leiten". Peck and Colby The New International Encyclopedia Poggendorff II 317; DSB X 188 f.; see PMM 289 unknown‎

書籍販売業者の参照番号 : 24606

‎OHM, Georg Simon‎

‎Die galvanische Kette mathematisch bearbeitet‎

‎Berlin: J.G.F. Kniestädt for T.H. Riemann 1827. First edition. <p>First edition of "Ohm's great work" DSB containing the fully-developed presentation of his theory of electricity including Ohm's Law. "Ohm's great contribution − 'The Galvanic Chain Mathematically Calculated' − was to measure the rate of current flow and the effects of resistance on the current. 'Ohm's law' − that the resistance of a given conductor is a constant independent of the voltage applied or the current flowing was arrived at theoretically by analogy with Fourier's heat measurements" PMM.</p>. PMM 289 - Measuring Electricity. First edition of "Ohm's great work" DSB containing the fully-developed presentation of his theory of electricity including Ohm's Law. "Ohm's great contribution − 'The Galvanic Chain Mathematically Calculated' − was to measure the rate of current flow and the effects of resistance on the current. 'Ohm's law' − that the resistance of a given conductor is a constant independent of the voltage applied or the current flowing that is C = E/R where C = current E = electromotive force and R = resistance − was arrived at theoretically by analogy with Fourier's heat measurements 1800-14" PMM.<br/> <br/> <br /> <br /> "The expression "investigated mathematically" in the title of Ohm's book described his objective: to deduce the properties of the galvanic circuit from a set of "fundamental laws." The first of these laws states that electricity passes only between adjacent particles of the conductor and that the quantity passed is proportional to the difference in electroscopic force at the two particles. Here Ohm drew on an analogy to Fourier's heat theory in which the quantity of caloric passed between two particles is proportional to the difference between their temperatures. Ohm's second law supported by Coulomb's experiments states that the loss of electricity in unit time from the conductor to the air is proportional to the electroscopic force of the electricity to the amount of surface exposed and to a coefficient that depends on the air; acknowledging that this second law has little bearing on the phenomena of galvanic currents Ohm included it to make the theory complete and parallel to Fourier's theory of heat. The third and last law states that two bodies in contact maintain the same difference of electroscopic force at their common surface which is the basic tenet of the contact theory of the battery. From these three laws Ohm derived differential equations for electric currents analogous to Fourier's and Poisson's for heat which indicated to him an "intimate connection" between the two phenomena. <br/> <br/> <br /> <br /> "The mathematical expression of Ohm's physical analogy between the conduction of electricity and the conduction of heat is an equation identical in form to Fourier's. The only difference is in the physical significance of the symbols entering the equation: in Fourier's the independent variable is the temperature; in Ohm's it is the electroscopic force which is the force with which an electroscope a body of constant electrical condition is attracted to or repelled from a body it is brought into contact with. Following an approach Fourier had made familiar Ohm mathematically divided the conductor into infinitely thin discs and calculated the quantity of electricity transferred per unit time across the parallel surfaces and outward through the edges of the discs. The result was the fundamental second-order partial differential equation of Ohm's theory . Having formulated the physical problem as a differential equation Ohm then solved it to obtain relations between directly measurable quantities. Manipulating the solution written as an infinite series of sine and cosine functions with damping coefficients Ohm arrived at . his law relating electric current resistance and tension. <br/> <br/> <br /> <br /> "The "torch of mathematics" Ohm wrote shines through physics illuminating its dark places. With his Galvanic Circuit he could claim that mathematics had "incontrovertibly" possessed a "new field of physics from which it had hitherto remained almost totally excluded." By means of mathematical deductions from a few experimental "principles" galvanic phenomena had been brought together in "closed connection" and presented as a "unity of thought." The deductions showed that the seemingly disparate phenomena of electric tension and current are really connected in nature partially realizing Ohm's goal of fashioning the theory of electricity as a "whole" .<br/> <br/> <br /> <br /> "When the Galvanic Circuit appeared few physicists in Germany knew mathematical physics sufficiently to understand it. Journal editors were afraid their readers could not understand papers containing the simplest mathematics as Ohm complained. For reviewing Ohm sent a copy of his book to Schweigger at Halle who did not see the point of a mathematical treatment. To have it evaluated the Prussian minister of culture sent a copy to Kämtz Schweigger's colleague at Halle who could not follow the mathematical derivation as is clear from his cautious review of it. In Berlin which desperately needed a "mathematical physicist" Ohm's work received its most famous and to Ohm irritating review from Pohl who was neither a mathematical nor a typical Berlin physicist . Pohl complained that Ohm had not paid attention to the "essence" of the circuit and had merely expressed some properties of electricity in formulas. This was no achievement but only a replication of Fourier's and Poisson's work in another part of physics . In general the response to Ohm's book reflected a paucity of physicists with good mathematical knowledge in Germany in the late 1820s. But one German review of Ohm's book showed complete comprehension. Ohm sent his book to Kastner in Erlangen to be reviewed in his journal. Kastner asked the mathematician Wilhelm Pfaff to write the review but Pfaff did not know the literature . The review that appeared under Pfaff's name was apparently written by Ohm himself after his brother had interceded. The review was of course favourable but a favourable review does not necessarily make a successful book. Sales of the Galvanic Circuit were unimpressive and Ohm paid friends to order the book from out of town to make a better impression on the publisher. The book was in print for eight years then not again for sixty years though in the meantime it had come out in several translations. Ohm sent free copies to everyone who might help him as he did not want to return to his teaching in Cologne" Jungnickel & McCormmach pp. 53-7. <br/> <br/> <br /> <br /> Georg Simon Ohm 1789-1854 was educated together with his brother Martin the mathematician principally by his father who gave his sons a solid education in mathematics physics chemistry and the philosophies of Kant and Fichte; their considerable mathematical ability was recognized in 1804 by the Erlangen professor Karl Christian von Langsdorf who enthusiastically likened them to the Bernoullis. Ohm received his Ph.D. from the University of Erlangen in 1811 but after teaching there for three semesters as a Privatdozent he was only able to find employment as a schoolteacher first at Bamberg and then from 1817 at the recently reformed Jesuit Gymnasium at Cologne. "The ideals of wissenschaftliche Bildung had infused the school with enthusiasm for learning and teaching; and this atmosphere which appears later to have waned coupled with the requirement that he teach physics and the existence of a well-equipped laboratory stimulated Ohm to concern himself for the first time avidly with physics. He studied the French classics − at first Lagrange Legendre Laplace Biot and Poisson later Fourier and Fresnel − and especially after Oersted's discovery of electro-magnetism in 1820 did experimental work in electricity and magnetism. It was not until early in 1825 however that he undertook research with an eye toward eventual publication" DSB.<br/> <br/> <br /> <br /> "Feeling increasingly burdened by his teaching at a secondary school in Cologne Ohm took his father's advice and asked the Prussian minister of culture for a year off. To the minister he explained that for a long time he had divided his attention between mathematics and physics though for practical reasons he had emphasized physics. By taking up physics he did not have to give up mathematics he said since the two were closely connected. His appeal to the minister contained an element of calculation: he regretted that the French had recently dominated physics and he had been studying the mathematical works by Laplace Fourier Poisson Fresnel and other French masters to see what they had left for him to do. He had been doing purely experimental work on the whole but he had in hand a mathematical theory of galvanic current; all he needed was time off to complete it and he added to work out a theory of light as well. On the recommendation of Ermann the minister approved Ohm's request. With half salary Ohm went off to Berlin in 1826 to live in his brother's house where he had a small apartment with space for doing experiments. With these improved working conditions he developed the mathematical theory of the galvanic current perhaps with his brother's help with the calculations. The result was the Galvanic Circuit .<br/> <br/> <br /> <br /> "After the Galvanic Circuit Ohm carried out important researches on tones and on crystal optics and he undertook a comprehensive theory of physics. In the year the Galvanic Circuit was published he began to speak of a greater work to come one that would treat the whole of molecular physics. Apparently he wanted to derive all physical phenomena from analytical mechanics and molecular hypotheses. Ohm published the first volume containing the mathematical preliminaries. In the second volume he intended to treat dynamics and in the third and fourth its application to physical phenomena. But Ohm's late call to Munich University interfered with his plan and the volumes never appeared. The existence of the plan however pointed to the confidence of the author of the Galvanic Circuit in the power of mathematical physics to complete the understanding of nature that Newton had begun" Jungnickel & McCormmach pp. 53-8. <br/> <br/> <br /> <br /> Widespread understanding and acknowledgement of the importance of the Galvanic Circuit did not come until the late 1830s and early 1840s when Ohm's work began to receive official recognition with corresponding memberships of the Berlin and Turin academies in 1839 and 1841 respectively the award of the Royal Society of London's Copley Medal in 1841 and finally just before his death the chair of physics at the University of Munich in 1852. In 1881 when the importance of Ohm's work was fully understood the standard unit of electrical resistance was named the ohm in his honour at the Paris Conference on international standards. <br/> <br/> <br /> <br /> Waller 11419; Wellcome IV p. 260; Wheeler Gift Cat. 835. Jungnickel & McCormmach Intellectual Mastery of Nature. Theoretical Physics from Ohm to Einstein Volume 1: The Torch of Mathematics 1800 to 1870 1990. <br /> <br/> <br/> 8vo 195 x 123 mm pp. iv 245 errata on p. 245 1 folding engraved plate. Contemporary patterned German cloth gilt spine lettering light wear to capitals and corners. Previous owner's signature removed from title. Custom half leather clamshell box. J.G.F. Kniestädt for T.H. Riemann unknown‎

書籍販売業者の参照番号 : 5475

‎Ohm, Georg Simon‎

‎Die galvanische Kette 1827 German Edition‎

‎hardcover. Good. Access codes and supplements are not guaranteed with used items. May be an ex-library book. hardcover‎

書籍販売業者の参照番号 : 1017845654.G ISBN : 1017845654 9781017845655

‎OHM, Georg Simon‎

‎Die galvanische Kette mathematisch bearbeitet‎

‎1827. One folding engraved plate. iv 245 pp. lacking the errata leaf & leaf of ads. 8vo cont. grey paste-paper boards lower joint with short split at head & foot. Berlin: T.H. Riemann 1827.<br/> <br/> First edition and a splendid association copy of this pioneering work which contains one of the most important discoveries in electrical science — “Ohm’s law†— the basis of the present system of electrical measurement. Ohm discovered the unit of resistance in an electrical current. This copy belonged to the “Prince of Mathematicians†— Carl Friedrich Gauss — and has the “Gauss-Bibliothek†stamp on the title. It is quite exciting to be able to link two of the greatest 19th-century scientists through an important book like this. <br/> <br/> “In the field of electrical measurement Ohm was the great pioneer…Ohm’s great contribution — ‘The Galvanic Chain Mathematically Calculated’ — was to measure the rate of current flow and the effects of resistance on the current. ‘Ohm’s law’ — that the resistance of a given conductor is a constant independent of the voltage applied or the current flowing — was arrived at theoretically by analogy with Fourier’s heat measurements 1800-14.â€â€“Printing & the Mind of Man 289. <br/> <br/> It is known that the publisher was forced to pulp most of the copies of this book due to lack of sales. <br/> <br/> A very fine and fresh copy. Lacking the errata leaf it clearly was never bound-in and as usual the leaf of ads. With the stamp of the Royal Observatory at Göttingen on free front endpaper with release stamp facing on the front paste-down endpaper and title. <br/> <br/> ⧠Dibner Heralds of Science 63. Horblit 81. Sparrow Milestones of Science 154. Wheeler Gift Cat. 835. unknown‎

書籍販売業者の参照番号 : 3373

‎Ohm, Georg Simon‎

‎Gesammelte Abhandlungen German Edition‎

‎paperback. Good. Access codes and supplements are not guaranteed with used items. May be an ex-library book. paperback‎

書籍販売業者の参照番号 : 3958010113.G ISBN : 3958010113 9783958010116

‎Ohm, Georg Simon‎

‎The Galvanic Circuit Investigated Mathematically 1891‎

‎paperback. Good. Access codes and supplements are not guaranteed with used items. May be an ex-library book. paperback‎

書籍販売業者の参照番号 : 1165680904.G ISBN : 1165680904 9781165680900

‎Ohm, Georg Simon‎

‎The Galvanic Circuit Investigated Mathematically: Issue 102 Of Van Nostrand Science Series‎

‎hardcover. Good. Access codes and supplements are not guaranteed with used items. May be an ex-library book. hardcover‎

書籍販売業者の参照番号 : 1015653537.G ISBN : 1015653537 9781015653535

‎Ohm, Georg Simon‎

‎The Galvanic Circuit Investigated Mathematically 1891‎

‎hardcover. Good. Access codes and supplements are not guaranteed with used items. May be an ex-library book. hardcover‎

書籍販売業者の参照番号 : 1104438461.G ISBN : 1104438461 9781104438463

‎Ohm, Georg Simon‎

‎The Galvanic Circuit Investigated Mathematically 1891‎

‎hardcover. Good. Access codes and supplements are not guaranteed with used items. May be an ex-library book. hardcover‎

書籍販売業者の参照番号 : 1169984290.G ISBN : 1169984290 9781169984295

‎Ohm, George Simon‎

‎Théorie mathématique des courants électriques French Edition‎

‎hardcover. Good. Access codes and supplements are not guaranteed with used items. May be an ex-library book. hardcover‎

書籍販売業者の参照番号 : 3382721597.G ISBN : 3382721597 9783382721596

‎OHM, GEORG SIMON - THE PRELIMINARY ANNOUNCEMENT OF OHM'S LAW‎

‎Vorläufige Anzeige des Gesetzes nach welchem Metalle die Contaktelectricität leiten;‎

‎Leipzig Johann Ambrosius Barth 1825. Contemp. hcalf. 5 raised bands gilt spine and gilt lettering to spine. A few scratches to spine. Small stamp on verso and on titlepage. A tear to right margin of titlepage repaired. In: "Annalen der Physik und Chemie. Hrsg. von J.C. Poggendorff" Poggendorff Bd. 4. 10476 pp. 4 large folded tables 6 engraved plates some folding. Small stamp on verso of plates. Ohm's paper: pp.79-88. Internally fine and clean. <br/><br/><em>First appearance of a paper of outmost importence in the history of electricity - it is Ohm's first scientific paper and it contains the report on the different original experiments sending a current through a variety of test wires that was the foundation for his famous law Ohm's Law. The paper contains the original research material that was to immortalize his name for the mathematical formulation of the law two years later in the well-known work "Die galvanische Kette mathematisch bearbeitet" 1827. - This paper was at the same time published in Schweiggers Journal."Ohm's first scientific paper was "Vorläufige Anzeige des Gesetzes." the paper offered. In it he sought a functional relationship between the decrease in the electromagnetic force excerted by a current-carrying wire and the lenght of the wire.Fromthe zinc and copper poles of a voltaic pile he ran two wires A and B the free ends of which terminated in small mercury-filled cups M and N; between M and another cup O he ran a third wire C. Together AB and C formed what he called the "invariable conductor" to distinguish it from one of the seven wires of different lenghts that when placed in a circuit between O and N constituted the "variable conductor". Among the latter was one "veru thick" wire four inches long and six thinner ones 0.3 line .025" in diameter ranging in lenght from one foot to seventy-five feet. Finally over wire C hung the magnetic needle of a Coulomb torsion balance which served to measure the electromagnetic force exerted when one of the variable conductors completed the circuit.He then found that the loss in force was equal to the difference between the normal force and the lesser force occasioned by one of the other wires divided by the normal force. Tabulating these value against the lenghts of the wires he found that his data were well represented by the formula v=0.41 log 1x where v is the loss in force and x is the lenght of the wire in feet."DSB X p.187. - This expression is the preliminary formula for his famous relations between voltage amperage and resistance R=V/I.Parkinson "Breakthrough" 1825 P. - Ronald's Library p. 376.The volume contains other importent papers in the history of chemistry and physics Berzelius F. Wöhler F.E. Neumann Heinrich Rose Chr. Hansteen Fresnel etc. </em> hardcover‎

書籍販売業者の参照番号 : 43090

‎OHM, GS (GEORG SIMON). G S‎

‎Experimentale Beiträge zu einer vollständigen Kenntniss des elektromagnetischen Multiplicators. Nachschreiben von J.S.C. Schweigger‎

‎Halle Eduard Anton 1829. Contemp. hcalf. Spine gilt. In: "Jahrbuch der Chemie und Physik für 1829. Hrsg. von W. Schweigger-Seidel" Bd. I.Journal f. Chemie u. Physik.LV.Band und = Jahrbuch der Chemie u. Physik.XXV. Bd. XXIV48019 - Plan und vorläufige Statuten des pharmaceutischen Instituts zu Halle pp. 3 engraved plates. Some scattered brownspots. Entire volume offered. Ohm's paper: pp. 1-64 Beiträge pp. 64-74. <br/><br/><em>First printing. Ohm continues in this major paper with experiments on the "Galvanische Kette" Ohm's Law. The offered volume having many other importent papers in chemistry. </em> unknown‎

書籍販売業者の参照番号 : 42879

‎OHM, GS (GEORG SIMON). G S‎

‎Grundlinien zu einer zweckmässigen Behandlung der Geometrie als höheren Bildungsmittels an verbereitenden Lehranstalten. Mit zwei Kupfertafeln. - OHM'S FIRST WORK‎

‎Erlangen J.J. Palm und Ernst Enke 1817. 8vo. Nice cont. marbled cardboardbinding w. gilt title label and single gilt lines to spine. Corners and edges of boards bumped and some minor wear to capitals otherwise very nice and clean. Also internally in excellent condition w. almost no brownspotting. A few leaves w. marginal markings all in weak pencil. Printed on good paper. XXXII 224 2 -errata pp 2 folded plates. <br/><br/><em>The very rare first edition of Ohm's first work which actually laid the foundation for his career and gave him the opportunity of working as a scientist. The work was printed eight years before his first scientific paper "Vorläufige Anzeige des Gesetzes nach welchem Metalle de Contakt-elektrizität leiten" 1825 which contained for the first time the original research that was to immortalize his name. The German physicist Georg Simon Ohm 1789 -1854 who later became famous for having established the fundamental relationship between voltage current and resistance and thereby founding electrical circuit analysis all based on what has ever since Ohm been known as "Ohm's Law" was solidly educated in mathematics physics chemistry and philosophy by his very skilled autodidact father. From 1800 to 1805 Ohm attended the Erlangen Gymnasium after which he attended the University of Erlangen for three years until his father withdrew him and placed him in exile in Switzerland because he was so dissatisfied with him wasting his scientific abilities; -Georg Ohm was primarily interested in dancing billiards and ice skating. He then became a mathematics teacher in Gottstadt bei Nydau and in 1809 he went to Neuchâtel for two years as a private teacher although he would have preferred to follow Karl Christian von Langensdorf to Heidelberg to restart his mathematical studies. Langendorf however advised Ohm to study mathematics on his own and to read the works of Euler Laplace and Lacroix which he did. In 1811 Ohm returned to the University of Erlangen where he received his PhD. He now taught as a Privatdozent for three semesters but he could not advance and made almost no money so he was forced to seek employment from the Bavarian government. The best position that he was offered was that of a teacher of mathematics and physics at a poor quality low-prestige Realschule in Bamberg where he stayed with great dissatisfaction for three years until the school got closed down in March 1816. He was now assigned to teach a section of mathematics at another overcrowded and ill reputed school in Bamberg. During these years Georg Ohm felt very unhappy with his position and realized that he had to do something to improve his merits in order to get out of Bamberg and have hopes to find a better post. And thus he undertook the writing of his first work the elementary geometry text which was to prove his true abilities. Ohm sent the manuscript to King Wilhelm III of Prussia and in 1817 he was offered the position of Oberlehrer of mathematics and physics at the recently reformed Jesuit Gymnasium at Cologne. This was a very good school which was based on the ideals of proper scientific education and enthusiasm for learning and teaching and it was this position that stimulated Ohm to seriously concern himself with physics which he had never done before. The physics lab was very well equipped and Ohm could now devote himself to experimenting on physics."Ohm's fist work was an elementary geometry text "Grundlinien." which embodied his ideals on the role of mathematics in education. The student he believed should learn mathematics as if it were the free product of his own mind not as a finished product imposed from without. Ideally by fostering the conviction that the highest life is that devoted to pure knowledge education should create a self-respect capable of withstanding all vicissitudes in one's external circumstances. One detects in these sentiments the reflection not only of his own early education but also of the years of isolation in Switzerland and of personal and intellectual deprivation of Bamberg. The resulting inwardness of Ohm's character and the highly intellectualized nature of his ideals of personal worth were an essential aspect of the man who would bring the abstractness of mathematics into the hiterto physical and chemical domain of galvanic electricity." D.S.B. X p. 187. </em> hardcover‎

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