‎Thé‎

‎"DUPERREY, L.I. - MAPPING THE GILBERT ISLANDS.‎

‎Notice sur la Configuration de l'équateur magnétique, conclue des observations faites dans la campagne de la Corvette la Coquille.‎

‎(Paris, Crochard, 1830). No wrappers. In: ""Annales de Chimie, ou Recueil de Mémoires concernant la Chemie"" 2e Series, Tome 45, Cahier 3. Pp. 337-448 a. 1 engraved map (entire issue offered). Duperrey's paper: pp. 371-386. Text with scattered brownspots. Map with a small closed tear in lower left corner, otherwise fine.The map: ""Configuration de LÉquateur Magnétique.... faites dans la campagne de la Corvette de S.M. la Coquille, pendent les années 1822, 1823, 1824 et 1825. Par M.L.I. Duperrey Commandant de L'Expedition"" Left: Dressée par L.I. Duperrey, en 1829. Right corner: Gravée par Ambroise Tardieu. (29x80 cm. (the map-sheet))‎

‎In 1820, the islands were named the Gilbert Islands or îles Gilbert (in French). Duperrey was the first to put together on a map the whole Gilbert Islands archipelago with the name given to it by Admiral Krusenstern after the British Captain Thomas Gilbert, who crossed the archipelago in 1788. Duperrey commanded La Coquille on its circumnavigation of the earth (1822-1825).‎

Referenz des Buchhändlers : 49607

‎"DUMAS, JEAN BAPTISTE ANDRÈ - ANNOUNCING THE LAW OF SUBSTITUTION.‎

‎Recherches de Chimie organique. Lu à l'Academie des Sciences le 13 janvier 1834.‎

‎Paris, Crochard, 1834. No wrappers, as extracted from: ""Annales de Chimie et de Physique, Par MM. Gay-Lussac et Arago."", tome 56, pp.1-150. With titlepage to vol. 56. Titlepage with some browning to corners and some brownspots. Text with scattered brownnspots.‎

‎First printing of this milestone paper in organic chemistry which marks a very importent step toward a complete structural theory of organic chemistry, THE SUBSTITUTION THEORY.""In 1834 Dumas presented a long paper, ""Recherches de Chimie organique"", to the Academy of Sciences in Paris. In this he described chloroform and chloral and explained the mechanism by which chlorine acted upon ethyl alcohol. The paper was published soon afterwards (as offered here) and several years later was reprinted with the addition in the theoretical part of Dumas's theory of metalepsy.""(Leicester & Klickstein ""A Source Book in Chemistry"", p. 320 ff.). - Parkinson ""Breakthrough"" 1834 C. - Partington IV, pp. 360 ff.‎

Referenz des Buchhändlers : 43539

‎"DUMAS, JEAN BAPTISTE-ANDRE & J.S. STAS. - THE ATOMIC WEIGHT OF CARBON ESTABLISHED.‎

‎Recherches sur la véritable poids atomiques du carbone. (Lu à l'Academie des Sciences, le 21 décembre 1840).‎

‎Paris, Fortin, Masson et Cie, 1841. 8vo. Contemp. hcalf, raised bands, gilt spine. Light wear along edges. Small stamps on verso of titlepage. In: ""Annales de Chimie et de Physique"", 3e Series - Tome 1. 512 pp. a. 3 folded engraved plates (showing experimental apparatus).Small stamp to verso of plates. (The entire volume offered). Dumas & Stas' paper: pp. 1-59. Clean and fine.‎

‎First appearance in full of this paper, stating the correct weight of the carbon atom, which had profound influence on the development of organic chemistry. The first announcement (in extrait) came out in Comptes rendus, Tome Xi, 1840.""From 1840 onward he carried out an important revision of the atomic weights of thirty elements. His most valuable contribution in this field was his very precise determination of the atomic weight of carbon (jointly with his pupil Stas) in 1840.2 A previously accepted weight, determined by Berzelius as C = 12.20 (O = 16), was shown to be incorrect. Dumas proved that C = 12±.002 (O = 16) or C = 75 (O = 100). The analysis was made by burning diamond and artificial and natural graphite in oxygen"" the carbon dioxide formed was weighed in potash solution. The results were in close agreement. The ""new"" weight of carbon had a great effect on the progress of organic chemistry.""(DSB).The volume contains further notable papers by Gerhardt et Cahours ""Recherches chimiques sur les huiles essentitielles"", pp. 60-110, by Laurent, Boussingault, Regnault, Dulong, Melloni et al.‎

Referenz des Buchhändlers : 44902

‎"DULONG, (PIERRE) & (ALEXIS) PETIT. - THE ""LAW OF DULONG AND PETIT"" THE CONNECTION BETWEEN ATOMIC WEIGHT AND ATOMIC HEAT ESTABLISHED.‎

‎Recherches Sur la Mesure des Températures et sur les Lois de la communication de la chaleur. Introduction. (+) Suite des Recherches sur la Mesure des Témperatures..... Seconde Partie. Des Lois du Refroidissement. (+) Suite Des Recherches sur la Mesure...‎

‎Paris, Crochard, 1817 a. 1819. Bound in one contemp hcloth (vol. 7) and 1 issue without wrappers. In: ""Annales de Chimie et de Physique, Par MM. Gay-Lussac et Arago."", Vol. 7 and vol. 10, Cahier 4. - 448 pp. a. 2 engraved plates (entire vol. 7 offered) + pp. 337-443 a. 2 engraved plate (entire issue offered, Cahier 4 of vol. 10 with htitle to the vol.). Dulon & Petit's papers: pp. 113-154, pp. 225-264, pp. 337-367 and Vol. X, pp. 395-413.‎

‎First edition of these 4 groundbreaking papers with the first appearance in print of THE LAW OF THE CONSTANCY OF ATOMIC HEAT, i.e. the specific heat multiplied by the atomic weight. The insight had far reaching implications as it showed a new way to Dalton's atomic theory. ""In 1815 Dulong's famous collaboration with the mathematical physicist Alexis Therese Petit began"" it produced three importent memoirs on heat."" (the papers offered here). The 2 first was awarded the price of the Academy in 1818 and was leading up to the last paper in which they formulted the ""Law of the Constancy of product of atomic weight and specific heat""""They (Dulang and Petit) were concerned with the specific heats of elements"" but if these elements really existed as atoms, it seemed possible that there might be a connection between trhe weight of the atom and the amount of heat aquired to raise the temperature of a given weight of that element by a certain amount."" (DSB). ""One of his (Dulong) most importent researches was made in collaboration with Alexis Thérese Petit (1791-1820), with whom he announced the law that the product of atomic weight and specific heat is constant (1819). It rendered a distinct service in fixing atomic weights, especially when these were in question, and enabled Berzelius and later Cannizzaro to arrive at correct atomic weights and the correct number of atoms in molecules."" (Leicester & Klickstein, A source Book in Chemistry 1400-1900, p. 273). Parkinson, Breakthroughs (1819).‎

Referenz des Buchhändlers : 47356

‎"Edited by the Executive Committee"‎

‎ARENA: NO. 3 SEPTEMBER 1961‎

‎London: Centre for Writers in Exile. 1961. 8vo - over 7¾" - 9¾" tall. F First Edition Used. Paperback. Very Good. ARENA: NO. 3 SEPTEMBER 1961. London P.E.N. Centre for Writers in Exile 1961. "Edited by the Executive Committee". Texts in English French and German. Bibliographical references. Stiff gray wrappers printed black; pictorial upper wrapper slight rubbing to wrappers else very good-fine. Scarce.Contains contributions by Storm Jameson E.G. Kostetsky Romain Rolland Paul Tabori et al.; book reviews etc.; noteworthy for the set of poems by Ukrainian exiles translated into German by various people and the upper wrapper illustration by Feliks Topolski. Centre for Writers in Exile paperback‎

Referenz des Buchhändlers : 0744916

‎"EHRENBERG, H. (HERMANN) - THE TEXAS REVOLUTION.‎

‎Freiheitskampf in Texas im Jahre 1836. 4 Theile in einem Bande.‎

‎Leipzig, Otto Wigand, 1844. 12mo. Contemp. full cloth. (original ?). Gilt spine. Gilt lettering. Faint remains of a numbering on lower part of spine. Stamp on title-page. (2),IV,293,(1) pp. and (4) pp. of publisher's announcements. Occassionally faint scattered browning.‎

‎First printing under this title, but it is the second edition of the author's ""Texas und seine Revolution"" 1843. It is the best first-hand account of the Texas revolution.Sabin,22072. - Howes E83.‎

Referenz des Buchhändlers : 57501

‎"EHRENFEST, PAUL. - THE ULTRAVIOLET CATASTROPHE.‎

‎Welche Züge der Lichtquantenhypothese spielen in der Theorie der Wärmestrahlung eine wesentlich Rolle ? (Which Features of the Quantum Hypothesis Play an Essential Role in the Theory of Heat Radiation).‎

‎Leipzig, Johann Ambrosius Barth, 1911. Later full cloth. Stamps on title-page. In ""Annalen der Physik"", Vierte Folge, Band 36. - VIII,1088 pp. and 4 plates. (Entire volume offered). Ehrenfest's paper: pp. 91-118.‎

‎First edition of the paper in which the term ""Ultraviolet Catastrophe"" appeared for the first time. ""Ehrenfest was one of the first to try to understand the significance of the strange new concept of energy quanta that Max Planck had introduced into physics in 1900 in his theory of blackbody radiation. In a series of papers culminating in his major study of 1911 (the paper offered), ""Which Features of the Quantum Hypothesis Play an Essential Role in the Theory of Heat Radiation?,"" Ehrenfest picked out the essentials of the early quantum theory and showed how they fit together. He proved rigorously that the energy of electromagnetic vibrations cannot take on all values - cannot vary continuously - if the total energy of the blackbody radiation in an enclosure is to be finite: Planck’s assumption that energy is a discrete variable was, therefore, logically necessary and not just sufficient. Ehrenfest also showed, by an analysis of Wien’s displacement law, that the ratio of energy to frequency was the only variable that could be quantized for a harmonic oscillator, if one wanted to maintain the statistical interpretation of entropy.""(DSB).‎

Referenz des Buchhändlers : 53367

‎"EINSTEIN, A. - THE SINGULARITY PROBLEM - ASSOCIATION COPY.‎

‎Demonstration of the Non-Existence of Gravitational Fields with a non-vanishing total Mass free of Singularities.‎

‎Tucuman, Argentina, 1941. Royal8vo. Orig. printed wrappers. Offprint from ""Revista. Universidad Nacional de Tucuman"", Series A Matematicas y Fisica Teorica, Vol. 2, Diciembre de 1941, Nos 1 y 2. Pp. 11-15. Fine and clean. This copy has belonged to Abraham Pais (1918-2000) - the famous Einstein scholar, theoretical physicist and Einsteins collegue at Princeton - and having his name on top of the frontwrapper ""A Pais""‎

‎First edition of a scarce paper in the offprint version. The paper ""represents the basis of the one written by the same author in collaboration with Wolfgang Pauli in 1943, in which, by following analogous lines, the proof of the non-existence of regular particle-type solutions was generalized to the case of cilyndrical geometries in Kaluza-Klein theory (Einstein & Pauli, 1943). Besides, other generalizations were subsequently presented. The (non)-existence of such solutions in classical unified field theory was undoubtedly an important criterion leading Einstein's investigations.""(Galvagno and Giribet).""In his search for a unified field theory that could undercut quantum mechanics, Einstein considered five-dimensional classical Kaluza-Klein theory. He studied this theory most intensively during the years 1938-1943. One of his primary objectives was finding a non-singular particle solution. In the full theory this search got frustrated, and in the x5-independent theory Einstein, together with Pauli, argued it would be impossible to find these structures."" (Jeroen van Dongen).Weil: 208. - Boni: 243.‎

Referenz des Buchhändlers : 46476

‎"EINSTEIN, A., L. INFELD, and B. HOFFMANN. - THE ROUND OFF OF GENERAL RELATIVITY - ASSOCIATION COPY.‎

‎The gravitational Equations and the Problem of Motion. (Part I). (Received June 16, 1937). (+) II. (Received May 29, 1939). 2 Papers (Paper II only Einstein and Infeld).‎

‎(Princeton, NJ.), Annals of Mathematics, 1938 a. 1940. Both papers in orig. printed wrappers. Offprints from ""Annals of Mathematics"", Vol. 39, No. 1, january, 1938 and Vol. 41, No. 2, April, 1940. Pp. 65-100 and pp. 455-464. Both clean and fine. This copy has belonged to Abraham Pais (1918-2000) - the famous Einstein scholar, theoretical physicist and Einsteins collegue at Princeton - and having his name on top of both frontwrappers ""A Pais"".‎

‎First editions, in the scarce offprint versions, of Einstein's last and highly important contributions to General relativity, and in which is shown that the equation of motion follows directly from the field equation that defined the geometry.""Einstein's last importent contribution to general relativity deals again with the problem of motion. It is the work done with Leopold Infeld and Banash Hoffmann on the N-body problem of motion. In these papers, the gravitational field is no longer treated as external. Instead, it and the motion of its (singular) sources are treated simultaneously. Anew approximationscheme is introduced in which the fields are no longer necessarily weak but in which the source velocities are small compared with the light velocity .... The equations obtained have found use in situations where Newtonian interaction must be included. '(These equations) are widely used in analyses of planetary orbits in the solarsystem. For example, the Cal Tech Jet Propulsion Laboratory uses them, in modified form, to calculate ephmerides for high-precision tracking of planets and spacecraft.""(Pais ""Subtle is the Lord"", p. 290-91).""The problem of the equation of motion of bodies is the following. The 1916 theory had a classical structure in the sense that there were both field equations (the curvature of space-time is determined by the mass and motion of bodies in space-time) and equations of motion of bodies (the world line of small mass is a geodesic). Are these two statements really separate? If the field equations were linear, they indeed would be. They are not linear, however, and Einstein showed (in the papers offered) that if matter is represented by a point singularity of the metric field, these singularities are located on world lines that are geodesics of space-time, provided its metric satisfies the equation of general relativity.""(DSB).Weil: 202 a. 295 (both with an asterix denoting a major paper). - Boni: 236 a. 236.1.‎

Referenz des Buchhändlers : 46475

‎"EINSTEIN, A. & N. ROSEN. - THE SILBERSTEIN-EINSTEIN CONTROVERSY.‎

‎Two-Body Problem in General Relativity Theory.‎

‎Lancaster, American Physical Society, 1936. 4to. In: ""The Physical Review"", Vol. 49, Second Series. X,971 pp. (Entire volume offered). Einstein & Rosen's paper: pp. 404-405.‎

‎First printing of Einstein and Rosen's answer to Silberstein's critique of Einstein's Theory of Relativity ..""Ludwik Silberstein, who initially was a supporter of the special theory, objected at different occasions against general relativity. In 1920 he argued that the deflection of light by the sun, as observed by Arthur Eddington et al. (1919), is not necessarily a confirmation of general relativity, but may also be explained by the Stokes-Planck theory of complete aether drag. However, such models are in contradiction with the aberration of light and other experiments (see ""Alternative theories""). And in 1935, Silberstein claimed to have found a contradiction in the Two-body problem in general relativity. However, also this claim was refuted by Einstein and Rosen (1935) (in the paper offered).""(Wikipedia).‎

Referenz des Buchhändlers : 47073

‎"EINSTEIN, ALBERT. - THE FIRST EXPLICIT STATEMENT OF THE ENERGY-MASS EQUATION !!‎

‎Über die vom Relativitätsprincip geforderte Trägheit der Energie. (On the Inertia of Energy Required by the Relativity Principle).‎

‎Leibzig, Johann Ambrosius Barth, 1907. 8vo. Contemp. hcalf. Spine gilt and with gilt lettering. Slightly rubbed and light wear to spineends. In ""Annalen der Physik"", Vierte Folge, Band 23. VIII,1000 pp. a. 4 plates. (The entire volume offered). Einstein's paper: pp.371-384. Stamps on titlepage (Allgemeine Electricitäts-Gesellschaft a. AEG Forschungsinstitut). Internally clean.‎

‎First edition of the first explicit statement of Einstein's energy-mass equation E=mc2.Nearly all descriptions of Einstein's scientific work state that the mass-energy equivalence E=mc2 was first formulated in Einstein's 1907 review paper 'Über das Relativitätsprinzip und die aus demselben gezogenen.' published in 'Jahrbuch der Radioaktivität und Elektronik' (see Weil no. 21 and Dictionary of Scientific Biography, vol. 4 pp.323 for examples). However, in his paper 'Über die von Relativitätsprincip geforderte Trägheit der Energie' [the offered paper] which predates the former mentioned by six months, Einstein gave a clear statement of the mass-energy equivalence E=mc2. See Lanczos: The Einstein Decade, pp.149-150 and 153 as well as Volume 2 of 'The Collected Papers of Albert Einstein' pp. 428.Einstein's first paper regarding the relation E=mc2 is his fourth 1905 paper, 'Ist die Trägheit eines Körpers von seinem Energieinhalt abhängig?'. In this short paper Einstein showed that a body releasing the energy E in the form of radiation will have its mass decreased by E/c2, and concluded that the mass of a body is a measure of its energy content, e.g., that all energy has mass. The next time Einstein returns to the subject is in his 1906 paper 'Das Prinzip von der Erhaltung der Schwerpunkts Bewegung und die Trägheit der Energie.'. Here Einstein concluded that one must either ascribe the inertial mass E/c2 to any form of energy E or else give up the fundamental law mechanics regarding conservation of the motion of the center of gravity. Then finally in the 1907 paper 'Über die von Relativitätsprincip geforderte Trägheit der Energie.' [the offered paper] Einstein makes the decisive step of assuming that all mass has energy. On page 382 Einstein considers the total energy of a moving mass point as the sum of its kinetic energy and its rest energy. In classical mechanics it is most convenient to set the second term to zero but in relativistic mechanics one obtains the simplest expression by setting the rest energy equal to mc2. Einstein then continues to show that this stipulation cannot lead to a contradiction in any relativistic argument. In a footnote on page 382 Einstein states for the first time the equation E=mc2 and mentions that this equation is the expression of the principle of the equivalence of mass and energy - see Volume 2 of 'The Collected Papers of Albert Einstein' pp. 428.The volume contains another paper by Einstein ""Bemerkungen zu der Notiz von Hrn. Paul Ehrenfest: ""Die Translation deformierbarer Elektronen und der Flächensatz"""", pp.206-208. - Weil No. 18. Further with 2 importent papers by Max v. Laue.Collected Works, Doc. 45. Weil 19. Boni 19.‎

Referenz des Buchhändlers : 53408

‎"Erik the Black" Asorson‎

‎Pacific Crest Trail Atlas Central California‎

‎Sugar Loaf CA: Blackwoods Press 2009. Rated "fair" due to some tea stains to top outer edges of first pages some minor soiling to other page edges general use-wear and some pencil marking on the inside of the back cover. However the book is complete maps are in good shape with no marking or writing on them and the binding is secure. The book is used but quite servicable. "New & Improved" Maps are in color. Carefully packed for safe shipping. Soft Cover. Good. Blackwoods Press Paperback‎

Referenz des Buchhändlers : 000451

‎"EULER, LEONHARD. - THE EULER-FERMAT THEOREM PROVED.‎

‎De Superficie Conorum Scalenorum, aliorumqve corporum conicorum. (On the surface of scalene cones and of other conic bodies). (+) Theoremata circa divisores numerorum. (Theorems on divisors of numbers). (2 papers by Euler).‎

‎(Petropoli (St. Petersbourg), 1750). 4to. Uncut, without wrappers. Extracted from ""Novi Commentarii Academiae Scientiarum Imperialis Petropolitanae"", Tom. I. ad Annum 1747 et 1748. Pp. 3-19 a. 1 engraved plate., and pp. 20-48.‎

‎First printing of both papers. The second is important as it contains Euler'is second proof of the Euler-Fermat theorem, which Euler presents as a consequence of the theorem that (a+b)p = ap+bp (mod p). This paper also includes results about possible divisors of a2n + b2n, and Euler uses this to show again that F5 is not prime. - Enestroem No. 133 a. 134.‎

Referenz des Buchhändlers : 42900

‎"EULER, LEONHARD. - INTRODUCING ""THE EULER CONSTANT"" AND ""THE FUNCTION NOTATION""‎

‎De Linea celerrimi descensus in Medio qvocunqve resistente. (On the curve of fastest descent in whatever resistent medium). (+) De progressionibus harmonicis observationes. (On harmonic progressions). (+) De infinitis curvis iusdem generis seu methodu...‎

‎(Petropoli, St. Petersburg, Typis Academiae, 1740). 4to. No wrappers. In: ""Classes Prima continens Mathematica. Commentarii Academiae Scientiarum Imperialis Petropolitanae"", Tomus VII ad Annum 1735, &..... Euler's papers: pp. 135-149, 150-161, 174-183 a. 184-200 and 2 engraved plates. Clean and fine.‎

‎First printing of 4 importent early papers by Euler. Enestroem: E42, E43, E44 a. E45.E42: This is Euler's second paper on the ""Brachistochrone problem"".E43. Here Euler introduces THE EULER CONSTANT. ""The Euler-Mascheroni constant (also called Euler's constant) is a mathematical constant recurring in analysis and number theory, usually denoted by the lowercase Greek letter gamma.""E44: ""This is an extensive paper that develops a method for finding a family of curves arising from the constant of integration of dz = Pdx, which is treated as the second variable"" the rudiments of partial differentiation are presented, and there is an extensive survey of homogeneous functions centred around what is now know as Euler's Theorem for such functions. The origins of this paper would seem to be Proposition 15 of Vol. 2 of the Mechanica, relating to families of tautochronous curves, where an integration relying on Euler's Theorem is required."" (Ian Bruce).E45: Here Euler introduces the FUNCTION NOTATION f(x). ""This is an equally extensive paper that continues the development of methods for finding a family of curves arising from the constant of integration of dz = Pdx, which is treated as the second variable. A method is developed for finding the modular equation for the first order equation that is extended to cover a number of cases"" this in turn is extended to second and higher orders. The method involves finding suitable functions to integrate, starting from a part of the modular equation that is integrable, so that the whole equation is of this form. This paper is noteworthy in addition as it seems to be the first in which the function notation, albeit in a slightly different form from the modern meaning, is introduce. I have not been able to check all the equations at this stage.""(Ian Bruce).This section also contains DANIEL BERNOULLI: Demonstrationes theorematum svorum de oscillationibus corporum filo flexili connexorum et catenae verticaliter suspensae. Pp. 162-173.‎

Referenz des Buchhändlers : 50926

‎"EULER, LEONHARD. - THE KOENIG-MAUPERTUIS CONTROVERSY.‎

‎Examen de la dissertation de M. le Professeur Koenig, inseree dans les actes de Leipzig, pour le mois de mars 1751. (Examination of the dissertation of Professor Koenig inserted into the Acts of Leipzig for the month of March 1751) (+) Essay d'une D...‎

‎(Berlin, Haude et Spener, 1753). 4to. No wrappers, as issued in ""Mémoires de l'Academie Royale des Sciences et Belles-Lettres"", tome VII, Année 1751. Pp. 221-245 and pp. 246-254 a. 1 engraved plate.‎

‎First editions. The first paper concerns the Argument over the principle of least action, relating to the famous controversy - and one of the ugliest scientific controversies - between Koenig and Maupertuis. ""In 1751 a sensational new argument began when S. König published some critical remarks on Maupertuis’s principle of least action (1744) and cited a letter of Leibniz in which the principle was, in König’s opinion, formulated more precisely. Submitting to Maupertuis, the Berlin Academy rose to defend him and demanded that the original of Leibniz’ letter (a copy had been sent to König from Switzerland) be presented. When it became clear that the original could not be found, Euler published, with the approval of the Academy, ""Exposé concernant l’examen de la lettre de M. de Leibnitz"" (1752), where, among other things, he declared the letter a fake. The conflict grew critical when later in the same year Voltaire published his Diatribe du docteur Akakia, médecin du pape, defending König and making laughingstocks of both Maupertuis and Euler.""(DSB) - Enestrom No. 199.The second paper - Enestrom No. 200.‎

Referenz des Buchhändlers : 49695

‎"EULER, LEONHARD. - THE RETROGRADE MOVEMENTS OF THE PLANETS.‎

‎Mémoire sur la plus grande Équation des Planetes. (Memoir on the Maximum Value of an Equation of the Planets).‎

‎(Berlin, Haude et Spener, 1748). 4to. No wrappers as issued in ""Memoires de l'Academie Royale des Sciences et Belles Lettres"". tome II, 1746. Pp. 225-248.‎

‎First apperance of Euler's mathematical treatment of the retrograde motions of the planets. He discusses the fact that planets observed from the earth exhibit a very irregular motion. In general, they move from west to east along the ecliptic. At times however, the motion slows to a stop and the planet even appears to reverse direction and move from east to west. We call this retrograde motion. After some time the planet stops again and resumes its west to east journey. However, if we observe the planet from the stand point of an observer on the sun, this retrograde motion will not occur, and only a west to east path of the planet is seen. These facts Euler treats mathematically.‎

Referenz des Buchhändlers : 46593

‎"EULER, LEONHARD. - THE MATHEMATICAL THEORY OF WINDMILL-EFFECTS.‎

‎Recherches plus exactes sur L'Effet des Moulins à Vent. (Refined studies into the effect of windmills)‎

‎(Berlin, Haude et Spener, 1758). 4to. No wrappers as issued in ""Memoires de l'Academie Royale des Sciences et Belles Lettres"". tome XII, 1756. Pp. 165-234 a. 1 folded engraved plate.‎

‎First printing of Euler's importent large memoir in which he develops the mathematical theory of windmills, and generates analytically the equations of the effects of winds on duoble-bended surfaces in relation to mechanical work. - Together with d'Alembert and Daniel Bernoully, Euler laid the foundation of mathematical physics. - Enestroem E 233.‎

Referenz des Buchhändlers : 42952

‎"EULER Le Fils, (JOHANN ALBRECHT). - THE ELECTRICAL THEORY.‎

‎Recherches sur la Cause physiques de L'Electricité.‎

‎(Berlin, Haude et Spener, 1759). 4to. No wrappers, as issued in ""Mémoires de L'Academie Royale des Sciences et belles-Lettres"", tome XIII, 1757. With titlepage to the year 1757 with engraved titlevignette and pp. 125-159 and 1 folded engraved plate. A Stamp to titlepage.‎

‎First appearance of this paper which expands his prize-winning memoir from the Petersbourg Academy. He is now convinced by Aepinus of the importence of Franklin's distinction between positive and negative electricity. He elaborates his theory of the identity of the electrical fluid with the ether.‎

Referenz des Buchhändlers : 46432

‎"EULER, LEONHARD. - ON THE PRINCIPLE OF LEAST ACTION.‎

‎Réfléxions sur quelques Loix génerales de la Nature qui s'observent dans les Effets des Forces quelconques. (Reflection on some general laws of nature which are observed in the effects of random forces).‎

‎(Berlin, Haude et Spener, 1750). 4to. No wrappers as issued in ""Mémoires de l'Academie Royale des Sciences et Belles-Lettres"" Tome IV, Année 1748. Pp. (189-) 218 and 1 engraved plate.‎

‎First appearance of this paper, in which Euler proves that given the static principle, he can derive the equilibrium conditions for a fluid, and from these, he obtains the integrability conditions for a ""Pfaffian"" form in three variables. He also looks at the equilibrium of a weight suspended from three elastic cords by looking, via analogy, to a special case of the problem for fluids.""In his 1748 paper, Euler in ""Reflexions sur quelques loix generales de la nature.."" starts by declaring his commitment to the least-action principle. His expression corresponds to what we would now call potential energy, so that his statement of least action (formulated by Maupertuis in 1746) in statics is equivalent to the principle that a system of bodies at rest will adopt a configuration that minimizes total potential energy. Euler called this quantity ""effort"".""Enestrom: E 146.‎

Referenz des Buchhändlers : 45871

‎"EULER, LEONHARD. - THE FUNDAMENTAL THEOREM OF ALGEBRA.‎

‎Sur le Point de Rebroussement de la seconde Espece de mr. le Marquis de l'Hopital. (On the nispidal points of the second kind of Mons. le Marquis de l'Hopital). (+) Recherches sur les Racines Imaginaires des Equations. (Research on imaginary roots o...‎

‎(Berlin, Haude et Spener, 1770). 4to. No wrappers, as issued in ""Mémoires de l'Academie Royale des Sciences et Belles-Lettres"", Tome V, pp. 203-221, 1 plate and pp. 222-288, 1 engraved plate.‎

‎Both papers first edition. The first paper is Euler's discussion of ""Cramers Paradox"" and it contains his inventions of 2 kinds of curves, ""Cusps of first kind"" or keratoid cusp and ""Cups of second kind"" or ramphoid cusp. - Enestroem E 169.The second paper contains Euler's famous proof of ""The fundamental Theorem of Algebra"". - Enestroem E 170.‎

Referenz des Buchhändlers : 41596

‎"Excelsior"‎

‎A Practical Treatise on the Balance Spring, Including Making, Fitting, Adjusting to Isochronism and Positions, and Rating; Also The Adjustment for Heat and Cold *FIRST EDITION*‎

‎144 pages plus adverts at back. Contents include: On Making Hair-Springs; On Fitting Hair-Springs; The Adjustment to Positions; The Adjustment to Isochronism; Regulating, or Rating; The Adjustment for Heat and Cold. Hinges intact. Above-average but not excessive wear. Silver lettering on backstrip still legible. Small chips from each end of backstrip. Blind-stamped boards. Unmarked. Book‎

‎"EÖTVÖS, ROLAND v. (LORÁND). - ESTABLISHING THE PROPORTIONALLITY BETWEEN GRAVITATIONAL AND INERTIAL MASS.‎

‎Untersuchungen über Gravitation und Erdmagnetismus.‎

‎(Leipzig, Johann Ambrosius Barth, 1896). Without wrappers as issued in ""Annalen der Physik und Chemie. Hrsg. von G. Wiedemann."", Neue Folge Bd. 59, Zehntes (No 10 1896). Entire issue offered. Pp. 193-416 a. 1 folded plate. Eötvös's paper: pp. 354-400 a. 15 large textillustrations, depicting his experimental apparatus. Clean and fine.‎

‎First appearance of Eötvös's main paper on gravitational phenomena, which became the subject of his lifework, and in which he showed experimentally, that the inertial mass and the gravitational mass are proportional, a discovery that became ONE OF THE BUILDING STONES OF THE THEORY OF GENERAL RELATIVITY.""The second extremely important application of the Eötvös balance involved a predetermination of the rate of gravitational acceleration for different bodies. It had been known from earlier work that all bodies fall with the same acceleration (in a vacuum), but the best previous determinations yielded only a limited accuracy. In response to a prize announcement by the University of Gottingen, Eötvös and his collaborators followed up his early measurements on this subject. The new measurements provided not merely a more accurate proof of a principle believed right until then, but much more: his results, proving that gravitational mass and inertial mass are equivalent, the possible deviation being about five parts in 109, became one of the building stones of the theory of general relativity. The experiment proves the “weak” form of the principle of equivalence, which states that the trajectory of a test particle, under the influence of gravitational fields only, depends only on its initial position and velocity, not on its mass and nature. Later confirmation of his results (during the last fifty years) reduced the possible deviation from perfect equivalence by a factor of 1,000."" (DSB, IV, 379 ff.).‎

Referenz des Buchhändlers : 43815

‎"FARADAY, (MICHAEL). - ON THE DISCOVERY OF ELECTOMAGNETIC INDUCTION.‎

‎(Lettré) A M. Gay-Lussac. Institution royale, Ier décembre 1832. (The letter ""On Magneto-electric Induction"").‎

‎(Paris, Crochard, 1832). No wrappers. In: ""Annales de Chimie et de Physique"", 2e Series, vol. 51, Cahier 4. Pp. 337-444 (Entire issue offered). Faraday's letter: pp. 404-434 a. 1 engraved plate. Some brownspots.‎

‎First printing of Faraday's famous letter to Gay-Lussac in which he claim to be the discoverer of electro-magnetic induction, analysed the results of the Italian philosophers, pointing out their errors, and defending himself from what he regarded as imputations on his character. The style of this letter is unexceptionable, for Faraday could not write otherwise than as a gentleman"" but the letter shows that had he willed it he could have hit hard. The letter was later translated into English and published in ""Philosophical Magazine"" in 1840 under the title ""On Magneto-electric Induction"".""In 1831, seemingly out of nowhere, came the discovery of electromagnetic induction and the beginning of the experimental researches in electricity which were to lead Faraday to the discovery of the laws of electrochemistry, specific inductive capacity, the Faraday effect, and the foundations of classical field theory."" (DSB).‎

Referenz des Buchhändlers : 48329

‎"FARADAY, MICHAEL.. - FARADAY'S DOCTRINE OF THE CONSERVATION OF ENERGY.‎

‎Experimental Researches in Electricity. - Sixteenth Series. 24. On the source of power in the voltaic pile. i. Exiting electrolytes, &c. being conductors of thermo and feeble currents. ii. Inactive conducting circles containing an electrolytic fluid...‎

‎(London, Richard and John E. Taylor, 1840). 4to. No wrappers as extracted from ""Philosophical Transactions"" 1840 - Part I. Pp. 61-91 and 1 engraved plate. + Pp. 93-127. Both papers Clean and fine.‎

‎First appearance of a historical paper in chemistry and physiscs in which Faraday announces his principle, that for all known cases of energy, the energy is not generated, but only transformed. The principle he showed applied to the voltaic cell, and he used it to argue against the so-called contact school in chemistry. The process imagined by the contact school ""would indeed be a creation of power, like no other force in nature"". There is no such thing in the world as ""a pure creation of force"" a production of power without a corresponding exhaustion of something to supply it.""""In his very long paper 'on the source of power in the voltaic pile', divided into two parts (XVI and XVII, 1840), faraday marshalled what he thought was owewhelming evidence against the contact theory in favour of the chemical theory.""(Partington: A History of Chemistry IV: p. 138).From 1831 to 1852 Michael Faraday published his ""Experimental Researches in Electricity"" in The Philosophical Transactions of the Royal Society. These papers contain not only an impressive series of experimental discoveries, but also a collection of heterodox theoretical concepts on the nature of these phenomena expressed in terms of lines of forces and fields. He published 30 papers in all under this general title.They represents Faraday's most importent work, are classics in both chemistry and physics and are the experimental foundations for Maxwell's electro-magnetic theory of light, using Faraday's concepts of lines of force or tubes of magnetic and electrical forces. His many experiments on the effects of electricity and magnetism presented in these papers lead to the fundamental discoveries of 'induced electricity' (the Farday current), the electronic state of matter, the identity of electricity from different sources, equivalents in electro-chemical decomposition, electrostatic induction, hydro-electricity, diamagnetism, relation of gravity to electricity, atmospheric magnetism and many other.""Among experimental philosophers Faraday holds by universal consent the foremost place. The memoirs in which his discoveries are enshrined will never cease to be read with admiration and delight"" and future generations will preserve with an affection not less enduring the personal records and familiar letters, which recall the memory of his humble and unselfish spirit.""(Edmund Whittaker in A History of the Theories of Aether and Electricity).‎

Referenz des Buchhändlers : 42287

‎"FARADAY, MICHAEL. - THE DISCOVERY OF ELECTRO-MAGNETIC INDUCTION (PMM 308) - GERMAN VERSION.‎

‎Experimental-Untersuchungen über Elektricität. (Frei übersetzt aus dem Philosop. Transact. f. 1832). (Erste-) Zweite Reihe. ( I-V). (I. Vertheilung elektrischer Ströme. II. Electricitätserregung durc Magnetismus. III. Neuer elektrischer Zustand der M...‎

‎Leipzig, Johann Ambrosius Barth, 1832. Contemp. hcalf., raised bands, gilt spine. Light wear along edges. In ""Annalen der Physik und Chemie. Hrsg. von J.C. Poggendorff"", Band 25. (Entire volume offered). VIII,648 pp. and 6 folded engraved plates. Small stamps on verso of titlepage and plates. Faraday's papers: pp. 91-142 a. pp. 142-186. with 3 folded engraved plates. Clean and fine.‎

‎First German editions of the 2 first memoirs of Faradays groundbreaking researches on electricity, constituting the first 2 papers of his ""Experimental Researches in Electricity"", and containing his fundamental discovery of electromagnetic induction, THE FOUNDATION OF NEARLY ALL THE ELECTRICITY IN USE TODAY. In 1820 Oersted had generated magnetism from electricity, Faraday here finds the opposite effect, generating electricity by magnetism. He also described the first electrical generator (second paper). THESE PAPERS ARE SOME OF THE GREAT CLASSICS OF CHEMISTRY AND PHYSICS.""Faraday demonstrated this theory involving the lines of force....by inserting a magnet into a coil of wire attached to a galvanometer. While the magnet was being inserted or removd, current flowed through the wire. If the magnet was held stationary and the coil moved over it one way or the other, there was current in the wire. In either case the magnetic lines of force about the magnet were cut by the wire.If the magnet and coil were both held motionless, whether the magnet was within the coil or not, there was no current...Faraday hd thus discovered electricalinduction...It was to lead to great things, but this was not apparent.""(Asimov).""Although his discovery of the electric motor and the dynamo was almost entirely identical to his theoretical discoveries, it laid the foundation of the modern electrical industry - electric light and power, teælephony, wireless telegraphy, televison etc. - by providing for the production of continous mechanical motion from an electrical source, and vice versa."" (PMM, 308).Horblit, 29 - Milestones, 62. - Dibner, 64. - PMM, 308.The volume contains further notable papers. Elie de Beaumont ""Zweiter geologischer Brief...an A.v. Humboldt über die relative Alter der Gebirgszüge"", pp. 1-58 a. 2 plates (one handcoloured), papers by Döbereiner, E. Lenz, Moser, Mitscherlich, de Saussure, J. Dumas, F.E. Neumann, Gay-Lussac, Johannes Müller ""Beobachtungen zur Analyse der Lymphe, des Bluts und des Chylus"", pp. 513-590.‎

Referenz des Buchhändlers : 44146