kirchhoff bunsen (27 résultats)

Etat : New.

Taschenbuch. Etat : Gut. 2. Aufl., Reprint [der Ausg.]. 74, 41 Seiten; Der Erhaltungszustand des hier angebotenen Werks ist trotz seiner Bibliotheksnutzung sehr sauber. Es befindet sich neben dem Rückenschild lediglich ein Bibliotheksstempel im Buch; ordnungsgemäß entwidmet. Sprache: Deutsch Gewicht in Gramm: 150.

1895; 74 Seiten; Format 19 x 12,5 cm; grauer Kunstleder beschichteter Karton-Deckel mit schwarzer Beschriftung und rotem Rundumschnitt, leicht gerundete Ecken. Mit 7 Abbildungen und 2 farbig lithographierten Tafeln. Einband minimal abgenutzt. Mit Besitzstempel: "Reform-Realgymnasium mit Realschule Ober-Schöneweide Lehrerbibliothek" und handschriftlichem Eintrag "Geprüft, den 8.II.47" mit Namenszug (hier handelt es sich vermutlich um die Prüfung zur Aussonderung von Naziliteratur aus öffentlichen Bibliotheken); wie oben beschrieben.

Etat : New. SUPER FAST SHIPPING.

Etat : New. KlappentextrnrnThis scarce antiquarian book is a facsimile reprint of the original. Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have.

Softcover. Etat : Gut. 1. Auflage. 74 S., Broschur , Bibex., typisch gestempelt , identischer Abdruck des 1860 veröffentlichten Originals , sauber, stabil und komplett.

Etat : New. SUPER FAST SHIPPING.

Etat : New. SUPER FAST SHIPPING.

Etat : Fair. Leipzig: Wilhelm Engelmann, 1895. Sm 8vo in flexible paper boards. 74+[2] pp. German. Two color plates at rear. A near-good book with boards lightly soiled. Previous owner's name stamped in purple ink to top edge of front cover and dampstaining along top- and fore-edge throughout. Light offsetting to plates and surrounding pages. Inquire if you need further information.

8°. 74 S. Mit 2 Tafeln und 7 Figuren im Text. Pappband der Zeit. Gebunden. Einband und die Tafeln etwas fleckig, ansonsten gut erhalten. = Ostwald's Klassiker der Exakten Wissenschaften, Nr. 72.

Hardcover. Etat : Very Good. [Bunsen, Hertz, Kirchhoff, Boltzmann, and many others.] H. Hertz, "Ueber die Dimensionen des magnetischen Pols in verschiedenen Maasssystemen" in "Annalen der Physik", Leipzig, Johann Ambrosius Barth, 1884, vol 24, pp vii,680, 12 folding plates, with the Hertz on pp 114-119. Contemporary paper-covered boards. Ex-library with two spine stamps, plus several old rubber stamps on title page and pastedown. The book is solid and the text bright and crisp and unmarked. Nice copy. [++] This volume also includes significant papers by these luminaries: R. W. Bunsen, "Ueber capillare Gasabsorption", Pages: 321-347; Ludwig Boltzmann,"Ueber die Möglichkeit der Begründung einer kinetischen Gastheorie auf anziehende Kräfte allein"; H. Hertz, "Ueber die Dimensionen des magnetischen Pols in verschiedenen Maasssystemen"; G. Kirchhoff, "Ueber die Formänderung, die ein fester elastischer Körper erfährt, wenn er magnetisch oder diëlectrisch polarisirt wird"; E. Goldstein, "Ueber electrische Leitung im Vacuum"; Friedrich Kohlrausch; "Die electrische Leitungsfähigkeit des im Vacuum destillirten Wassers"; and many others. On the Boltzmann paper, see Jed Buchwald, "History of the Electron, Birth of Microphysics", MIT, 2001.

Hardcover. Etat : Very Good. [Goldstein, Boltzmann, Bunsen, Hertz, Kirchhoff, Kohlrausch, Quincke, Lummer, Chistiansen, Natanson, and many others.] E. Goldstein, "Ueber electrische Leitung im Vacuum" and H. Hertz, "Ueber die Dimensionen des magnetischen Pols in verschiedenen Maasssystemen" in "Annalen der Physik", Leipzig, Johann Ambrosius Barth, 1885, vol 24, pp vii,680, 12 folding plates, with the Goldstein on pp79-82 and the Hertz on pp 114-119. Cloth-backed Nice copy. [++] Ex-libris from a library in Brussels, with several 19th century rubber stamps on the title page (though there are no external markings). Very well bound, with reinforced hingers. VG copy. [++] This volume also includes significant papers by these luminaries: R. W. Bunsen, "Ueber capillare Gasabsorption", pp321-347; Ludwig Boltzmann,"Ueber die Möglichkeit der Begründung einer kinetischen Gastheorie auf anziehende Kräfte allein"; H. Hertz, "Ueber die Dimensionen des magnetischen Pols in verschiedenen Maasssystemen"; G. Kirchhoff, "Ueber die Formänderung, die ein fester elastischer Körper erfährt, wenn er magnetisch oder diëlectrisch polarisirt wird"; E. Goldstein, "Ueber electrische Leitung im Vacuum"; Friedrich Kohlrausch; "Die electrische Leitungsfähigkeit des im Vacuum destillirten Wassers"; and many others. On the Boltzmann paper, see Jed Buchwald, "History of the Electron, Birth of Microphysics", MIT, 2001.  In 1886 Eugen Goldstein (who in 1876 coined the term "cathode rays" to describe the light emitted when electric current was forced through a vacuum tube and who in this year 1886 first detected the proton) ".noted that cathode-ray tubes with a perforated cathode emit a glow from the end of the tube near the cathode. Goldstein concluded that in addition to the electrons, or cathode rays, that travel from the negatively charged cathode toward the positively charged anode, there is another ray that travels in the opposite direction, from the anode toward the cathode. Because these rays pass through the holes, or channels, in the cathode, Goldstein called them canal rays."--Chemistry/Purdue site. In this paper Goldstein determines that temperature affects the flow of electrons in a cathode ray tube. [++]"While experimenting with cathode ray tubes, German physicist Eugen Goldstein (18501930) found that temperature affected the flow of cathode rays, and published his results in [the paper offered here].--History of Physics, the Wenner Collection.

Hardcover. Etat : Very Good. ++This is a great classic, a foundation paper in the history of spectrum analysis.++ Kirchhoff, Gustav and Robert Wilhelm Bunsen. "Chemische Analyse durch Spectralbeobachtungen," in "Annalen der Physik und Chemie," Leipzig: Johann Ambrosius Barth, 1860, vol. 110, pp.161-189 in the full volume of viii, 660pp. [++] Offered in the entire volume, very sturdily bound in relatively recent black cloth, which has a library Dewey number on spine bottom. Provenance: Universitat Konstanz, with two rubber stamps and several pencil annotations on rear of the title page. Very light and very occasional foxing, here and there. Fresh and crisp copy. [++] "Kirchhoff s major contribution to physics was his experimental discovery and theoretical analysis in 1859 of a fundamental law of electromagnetic radiation: for all material bodies, the ratio of absorptive and emissive power for such radiation is a universal function of wavelength and temperature. Kirchhoff made this discovery in the course of investigating the optical spectra of chemical elements, by which, in collaboration with Bunsen, he laid the foundation of the method of spectral analysis (1860) [this paper].--Complete DSB, online, "Kirchhoff". [++] "(Bunsen and Kirchhoff) demonstrate the value of their spectroscope [invented the preceding year, 1859, with the results also published in the Annalen] by heating an ore, finding unknown spectral lines (in the blue region), and thereby discovering the metal cesium."--Parkinson, Breakthroughs, 1860 (Chemistry), pg 356. [++] In the 1860 s Bunsen and Kirchhoff worked together to develop the field of spectroscopy. Kirchhoff realized in 1859 that when colored flames of heated materials, which usually give bright, sharp emission spectra, are placed in the path of an intense light source, they absorb light of the same wavelength that they otherwise emit, and produce characteristic absorption spectra. Bunsen saw that analyses of absorption spectra could be made in order to determine the composition of celestial and terrestrial matter. He further predicted that spectral analysis could aid in the discovery of new elements that might exist in too small quantities or be too similar to known elements to be identifiable by traditional chemical techniques. Spectral analysis led to Bunsen and Kirchhoff s announcement in 1860 of a new alkali metal, cesium, detected in a few drops of the alkaline residue from an analysis of mineral water obtained from Durkheim. The element was named cesium (from the Latin caesius, sky blue ) because of its brilliant blue spectral lines."--Complete DSB, online (Bunsen).

Paperback. Etat : New. Print on Demand. This book presents the first spectral analysis of various substances, opening a window into a new technique for precision chemical analysis by studying the light emitted by a burning substance as it passes through a prism. The authors explain how the spectra of various elements can be used for qualitative and quantitative analysis, demonstrating this technique on the alkali metals. The authors' research, described in this 1860 publication, laid the foundation for the field of spectroscopy in chemistry. This book will be of interest to historians of science and to analytical chemists interested in the development of their field. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.

Leather Bound. Etat : New. Language: German. Presenting an Exquisite Leather-Bound Edition, expertly crafted with Original Natural Leather that gracefully adorns the spine and corners. The allure continues with Golden Leaf Printing that adds a touch of elegance, while Hand Embossing on the rounded spine lends an artistic flair. This masterpiece has been meticulously reprinted in 2025, utilizing the invaluable guidance of the original edition published many years ago in 1895. The contents of this book are presented in classic black and white. Its durability is ensured through a meticulous sewing binding technique, enhancing its longevity. Imprinted on top-tier quality paper. A team of professionals has expertly processed each page, delicately preserving its content without alteration. Due to the vintage nature of these books, every page has been manually restored for legibility. However, in certain instances, occasional blurriness, missing segments, or faint black spots might persist. We sincerely hope for your understanding of the challenges we faced with these books. Recognizing their significance for readers seeking insight into our historical treasure, we've diligently restored and reissued them. Our intention is to offer this valuable resource once again. We eagerly await your feedback, hoping that you'll find it appealing and will generously share your thoughts and recommendations. Lang: - German, Pages:- 77, Print on Demand. If it is a multi-volume set, then it is only a single volume. We are specialised in Customisation of books, if you wish to opt different color leather binding, you may contact us. This service is chargeable. Product Disclaimer: Kindly be informed that, owing to the inherent nature of leather as a natural material, minor discolorations or textural variations may be perceptible. Explore the FOLIO EDITION (12x19 Inches): Available Upon Request. 77.

(Paris, Victor Masson et Fils, 1861). Without wrappers. In: "Annales de Chimie et de Physique", 3e Series - Tome 52, Cahier Aout 1861. Pp. 385-508. (Entire issue offered). Kirchhoff & Bunsen's paper: pp. 452-486 and 1 double-page folded chromolithographed plate, showing spectroscope and 8 spectra, among these the spectra of Cesium. First apperance in French of this fundamental papers, constituting the invention of Spectrum Analysis, and announcing the discovery of a new elements, Cesium, by using the new method of spectroscopy, developed by them. This technique, made possible by their invention of the spectroscope, is called "One of the most dashing advances of the human mind into the secrets of the composition of matter on earth and in cosmos"(Kedrow in "Spectralanalyse", 1961). The spectral lines proved to be a guide not only to the great world of the outer cosmos, but to the infra-tiny world within the atom. Balmer made the first steps in this direction (the Balmer-lines). The next year Kirchhoff and Bunsen published another memoir in which they announced the finding of another new element, Rubidium"The two investigators advanced, as scientifically established, the law that the bright lines in the spectrum may be taken as a sure sign of the presence of the respective metals. This conclusion was rendered doubtly sure by the discovery in the mineral water of Durkheim, through the spectrum, of two new metals. From the blue and the red lines, by which they were recognized, they were named "Cæsium" and "Rubidium". While spectrum analysis, as a terrestrial science, was due equally to Kirchhoff and Bunsen, its celestial applications belong to Kirchhoff alone."(Cajori in "A History of Physics in its Elementary Branches", pp. 160 ff).In a letter to Henry Roscoe, with whom Bunsen carried out a long importent series of photochemical researches, Bunsen wrote: "At present Kirchhoff and I are engaged in a common work which doesn't let us sleep.Kirchhoff has made a wonderful, entirely unexpected discovery in finding the cause of the dark lines in the solar spectrum, and increasing them artificially in the sun's spectrum, and inproducing them in spectra which does not have lines, and in exactly the same position as the corresponding Frauenhofer lines. Thus a means has been found to determine the composition of the sun and fixed stars with the same accuracy as we determine sulfuric acid, chlorine, etc., with our chemical reagents. Substances on the earth can be determined by this.

1 3/4 pp. gr.-8vo°. Nadelspuren am linken Rand. An ein Mitglied der Museumsgesellschaft in Frankfurt a.M., dessen Wunsch nach einemVortrag er nicht erfüllen könne.". Die Zeit, in der ich einmal die Ehre hatte, das zu thun, steht mir noch in der angenehmsten Erinnerung; dennoch muß ich . mich außer Stande erklären, Ihrer ufforderung nachzukommen. Mit meinem Fußübel geht es sehr viel besser, als in den früheren Jahren, dennoch behindert mich dasselbe noch in empfindlicher Weise bei jeder ungewöhnlichen Unternehmung und hält mich in der Furcht, daß wieder ein ernstlicher Rückfall einritt .".

8vo. 1 p. An einen Pastor: Es bedarf der Versicherung nicht, daß es mir war zum Vergnügen gereichten Dank Ihrem Erwarten zu entsprechen. []".

8vo. 1 p. An einen Kollegen: [] Es gereicht mir zum besondern Vergnügen, den Wunsch, dessen Vermittelung Sie übernommen, zu erfüllen, indem ich Ihnen die anliegende photographische Karte mit der Bitte um Beförderung derselben an ihre Bestimmung übersende []" Von Oktober 1852 bis zur Emeritierung im Jahre 1889 lehrte und forschte Bunsen in Heidelberg. Er entwickelte 1855 einen einfachen Gasbrenner mit nichtleuchtender Flamme (Bunsen-Brenner), der bald Eingang in alle Laboratorien fand. Die jahrelange Anwendung der Bunsenflamme zu analytischen Zwecken fasste er in den 1880 erschienenen Flammenreactionen' zusammen.

(22,5 x 14,5 cm). SS. (89)-168.; SS. (329)-408und SS. (489)-560. Mit 3 lithographierten Tafeln, davon 1 gefaltete und zwei farbig. Moderner Halbleinwandband im Stil der Zeit mit 2 (von 3) beigebundenen Umschlägen. Erste englische Ausgabe dieser berühmten Gemeinschaftsarbeit, in der die beiden Wissenschaftler erkennen, "daß eine jede verdampfbare Substanz, in eine Flamme gebracht, oder jeder glühende Dampf ein charakteristisches Spektrum habe, und daß das Spektrum deshalb ein ausgezeichnetes Mittel für die chemische Analyse sei und begründen dadurch die Spektralanalyse" (Darmstaedter). Weiter beschreiben sie ihre Untersuchungen und die damit neu entdeckten Elemente Cäsium und Rubidium. - Vereinzelt gering stockfleckig. Das erste Blatt mit restauriertem Eckabriss. Die letzte Tafel mit zwei Fleckenrändern, sonst gut erhalten. - DSB 7, 379 und 2, 586; Darmstaedter 587, 595 und 607.

(21,5 x 13 cm). (2) X, 660 S./ (2) X, 660 S. Mit 16 teils gefalteten und teils farbigen gestochenen Tafeln. Moderne Halbleinwandbände im Stil der Zeit. Erste Ausgabe dieser beiden berühmten Gemeinschaftsarbeiten. - In der ersten Arbeit erkennen Kirchhoff und Bunsen, "daß eine jede verdampfbare Substanz, in eine Flamme gebracht, oder jeder glühende Dampf ein charakteristisches Spektrum habe, und daß das Spektrum deshalb ein ausgezeichnetes Mittel für die chemische Analyse sei und begründen dadurch die Spektralanalyse" (Darmstaedter). - In der zweiten Arbeit beschreiben die beiden Wissenschaftler ihre Spektraluntersuchungen und die damit neu entdeckten Elemente Cäsium und Rubidium. - Titel gestempelt. Stellenweise etwas stockfleckig. Eine Tafel aus einem anderen Exemplar ergänzt, sonst gut erhalten. - DSB 7, 379 und 2, 586; Lockemann 67 und 71; Darmstaedter 587, 595 und 607.

Leipzig, Johann Ambrosius Barth, 1860, 1861. 2 uniform contemp. hcalf, raised bands, gilt spine. A few scratches to spine. In "Annalen der Physik und Chemie. Hrsg. von J.C. Poggendorff", Bd. 110 a. Bd. 113. - IX,668 pp. a. 8 folded plates. X,660 a. 8 folded plates. Entire volumes offered. The 2 papers: pp. 161-189 a. pp. 337-381 and plates (one plate in chromolithography, spectra of different elements). Verso of titlepages and verso of plates with small stamps. Internally fine and clean. First printing of these fundamental papers, constituting the invention of Spectrum Analysis and announcing the discovery of two new elements, Cesium and Rubidium by using the new method of spectroscopy developed by them. This technique, made possible by their invention of the spectroscope is called "One of the most dashing advances of the human mind into the secrets of the composition of matter on earth and in cosmos"(Kedrow in "Spectralanalyse", 1961). The spectral lines proved to be a guide not only to the great world of the outer cosmos, but to the infra-tiny world within the atom. Balmer made the first steps in this direction (the Balmer-lines)."The two investigators advanced, as scientifically established, the law that the bright lines in the spectrum may be taken as a sure sign of the presence of the respective metals. This conclusion was rendered doubtly sure by the discovery in the mineral water of Durkheim, through the spectrum, of two new metals. From the blue and the red lines, by which they were recognized, they were named "Cæsium" and "Rubidium". While spectrum analysis, as a terrestrial science, was due equally to Kirchhoff and Bunsen, its celestial applications belong to Kirchhoff alone."(Cajori in "A History of Physics in its Elementary Branches", pp. 160 ff).In a letter to Henry Roscoe, with whom Bunsen carried out a long importent series of photochemical researches, Bunsen wrote: "At present Kirchhoff and I are engaged in a common work which doesn't let us sleep.Kirchhoff has made a wonderful, entirely unexpected discovery in finding the cause of the dark lines in the solar spectrum, and increasing them artificially in the sun's spectrum, and inproducing them in spectra which does not have lines, and in exactly the same position as the corresponding Frauenhofer lines. Thus a means has been found to determine the composition of the sun and fixed stars with the same accuracy as we determine sulfuric acid, chlorine, etc., with our chemical reagents. Substances on the earth can be determined by this method just as easely as on the sun, so that, for example, I have been able to detect lithium in twenty grams of sea water.".

LeatherBound. Etat : New. BOOKS ARE EXEMPT FROM IMPORT DUTIES AND TARIFFS; NO EXTRA CHARGES APPLY. LeatherBound edition. Condition: New. Reprinted from 1901 edition. Leather Binding on Spine and Corners with Golden leaf printing on spine. Bound in genuine leather with Satin ribbon page markers and Spine with raised gilt bands. A perfect gift for your loved ones. Pages: 155 NO changes have been made to the original text. This is NOT a retyped or an ocr'd reprint. Illustrations, Index, if any, are included in black and white. Each page is checked manually before printing. As this print on demand book is reprinted from a very old book, there could be some missing or flawed pages, but we always try to make the book as complete as possible. Fold-outs, if any, are not part of the book. If the original book was published in multiple volumes then this reprint is of only one volume, not the whole set. Sewing binding for longer life, where the book block is actually sewn (smythe sewn/section sewn) with thread before binding which results in a more durable type of binding. Pages: 155.

LeatherBound. Etat : New. BOOKS ARE EXEMPT FROM IMPORT DUTIES AND TARIFFS; NO EXTRA CHARGES APPLY. LeatherBound edition. Condition: New. Reprinted from 1901 edition. Leather Binding on Spine and Corners with Golden leaf printing on spine. NO changes have been made to the original text. This is NOT a retyped or an ocr'd reprint. Illustrations, Index, if any, are included in black and white. Each page is checked manually before printing. Pages: 159 As this print on demand book is reprinted from a very old book, there could be some missing or flawed pages, but we always try to make the book as complete as possible. Fold-outs, if any, are not part of the book. If the original book was published in multiple volumes then this reprint is of only one volume, not the whole set. Sewing binding for longer life, where the book block is actually sewn (smythe sewn/section sewn) with thread before binding which results in a more durable type of binding. Pages: 159 Language: English.

Leather Bound. Etat : New. Language: English. Presenting an Exquisite Leather-Bound Edition, expertly crafted with Original Natural Leather that gracefully adorns the spine and corners. The allure continues with Golden Leaf Printing that adds a touch of elegance, while Hand Embossing on the rounded spine lends an artistic flair. This masterpiece has been meticulously reprinted in 2024, utilizing the invaluable guidance of the original edition published many years ago in 1901. The contents of this book are presented in classic black and white. Its durability is ensured through a meticulous sewing binding technique, enhancing its longevity. Imprinted on top-tier quality paper. A team of professionals has expertly processed each page, delicately preserving its content without alteration. Due to the vintage nature of these books, every page has been manually restored for legibility. However, in certain instances, occasional blurriness, missing segments, or faint black spots might persist. We sincerely hope for your understanding of the challenges we faced with these books. Recognizing their significance for readers seeking insight into our historical treasure, we've diligently restored and reissued them. Our intention is to offer this valuable resource once again. We eagerly await your feedback, hoping that you'll find it appealing and will generously share your thoughts and recommendations. Lang: - English, Pages: - 157, Print on Demand. If it is a multi-volume set, then it is only a single volume. We are specialised in Customisation of books, if you wish to opt different color leather binding, you may contact us. This service is chargeable. Product Disclaimer: Kindly be informed that, owing to the inherent nature of leather as a natural material, minor discolorations or textural variations may be perceptible. Explore the FOLIO EDITION (12x19 Inches): Available Upon Request. 157.

1st Edition. FIRST EDITION and appearance in French of an 1861 landmark paper marking "the invention of Spectral Analysis and the announcement of the discovery of two new elements, Cesium and Rubidium [and eventually many more] by using the new method of spectroscopy developed by Kirchhoff and Bunsen. The spectral lines that Kirchhoff and Bunsen discovered "predicted and demonstrated that new elements, so far missing in the Periodic Table, could be found with the help of spectral analysis. The spectra of the elements would later yield most important information about the structure of the atoms and would help to explain the Periodic Table" (Brandt, The Harvest of a Century, 28). Kirchhoff and Bunsen's discoveries were heralded as "One of the most dashing advances of the human mind into the secrets of the composition of matter on earth and in cosmos"(Kedrow, Spektralanalyse, 1961). Kirchhoff and Bunsen's collaboration would change the world, not just of chemical analysis, but also of astronomy and physics. Working with Bunsen at Heidelberg, Kirchhoff made a completely unexpected discovery. It was known at the time that, if held to flame, many chemical substances colored the flame in consistent, characteristic ways. Kirchhoff, without intending to, had identified the cause of the dark lines seen in the solar spectra by Fraunhofer and others. When certain chemicals were heated in Bunsen's burner, characteristic bright lines appeared, i.e., elements in the substance. In some cases these were at exactly the same points in the spectrum as Fraunhofer's dark lines. The bright lines were light coming from a hot gas, whereas the dark lines showed absorption of light in the cooler gas above the Sun's surface. The two scientists found that every chemical element produces a unique spectrum. This provides a sort of "fingerprint" which can confirm the presence of that chemical. Kirchhoff and Bunsen's worked out the laws of spectroscopy: "(1). An incandescent body gives off light in a continuous spectrum. (2) An excited (heated) body gives off a bright-line spectrum. (3) A vapor of an element absorbs white light in the places of the spectrum (producing dark lines) at the same points where the element heated to incandescence produce bright lines" (Ede, The Chemical Element: A Historical Perspective, 75). CONDITION & DETAILS: Entire volume. 8vo (9 x 5.5 inches; 225 x 138mm). 512 pp. Kirchhoff & Bunsen paper: 452-486. Illustration: 1 double-page folding chromolithographed plate depicting spectrum analysis (the colors remain very bright); another plate shows a spectroscope and 8 spectra, among these the spectra of Cesium. Binding: Entire volume in blue paper wraps with a chipped label at the spine. The wraps are in excellent condition and the text block is solid and tight. Interior: Complete and uncut. Some light foxing and toning throughout as well as a light (and minor) old damp stain at the margin, otherwise clean throughout.

Leipzig: Johann Ambrosius Barth, 1860. 8vo. (207x124mm). Entire volume offered here in contemporary card board binding with hand written paper label to spine. A fine copy. First edition of the paper which marks the beginning of spectrum analysis. In this work Kirchhoff and Bunsen announced their discovery of the two alkali metals, cesium and rubidium, with the aid of the spectroscope they had invented the year before. These discoveries inaugurated a new era in the means used to find new elements.