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Prag, Verlag von Wenzel Hess, 1849 -1852. 8vo. Uniformly bound in two contemporary black half calf binding with embossed ornamentation to spines. Light wear to extremities, leather on spine cracked and corners bumped. Ex-libris (Carl Henrik Koch, Danish professor in philosophy) pasted on to pasted down front end-papers. Occassionally brownpostted, primarily affecting first and last leaves. VIII, 374, (2), 386, (1) pp.; 369, (7), 338, (2) pp. Uncommon first edition of Bolzanos’ posthumously published “Edifying Discourses to Academic Youth" consisting of a collection of moral and philosophical lectures or discourses that Bolzano gave to students during his tenure as a professor of philosophy and religion at the University of Prague in the early 19th century.

(Berlin, Haude et Spener, 1769). 4to. No wrappers as issued in "Memoires de L'Academie Royale des Sciences et Belles Lettres", tome XXIII, pp. 165-310. First edition of a fundamental paper in the Theory of Numbers in which Lagrange gives a solution in integers of indeterminate equations of the second degree - a remarkable turning point in Diophantine analysis. - Fermat had asserted that he could determine when the more general equation x2-Ay2=B was solvable in integers and that he could solve it when solvable, but Lagrange solved it in this paper and furthermore he gives the complete solution to the problem of giving all integral solutions of a general equation where the coefficients are integers. - Cajori calls Lagrange "One of the greatest mathematicians of all times." - Poggendorff I:1344.

London, Macmillan & Co, 1896-97. Royal8vo. Bound in later half cloth with gilt lettering to spine. In "Nature", Vol. 55, November 1896 - April 1897. Bookplates to front free end-papers and library stamp to title page. Minor wear to extremities, otherwise very fine and clean. P. 347. [Entire volume: XL, 624 pp.]. First English edition of this landmark paper in which the Zeeman-effect was first announced. It is one of the most important and influential discoveries made in the later half of the 19th century. "The Zeemann effect not only opened a new world of facts which interest the physicist, the chemist, and even the astronomer, but the study also contributed - to an extent much greater than the study of the Stark effect - to the conceptual development of quantum theory" (Jammer). Together with Lorenz, Zeeman was awarded the Nobel Prize in Physics for "the extraordinary service they rendered by their researches into the influence of magnetism upon radiation phenomena". "The last experiment performed by Michael Faraday was an unsuccessful attempt to observe the influence of a magnetic field on the spectral lines of sodium. More than 30 years later, Pieter Zeeman took up the challenge and observed a broadening of the lines, which was soon recognized to be the splitting that we know as the Zeeman effect. Zeeman's account of the discovery, translated for Nature from the Proceedings of the Physical Society of Berlin, includes an interpretation based on Hendrik Lorentz's idea of "small molecular elements charged with electricity", and a rough calculation of the charge to mass ratio of these "ions"." (Nature Physics Portal)."Zeeman is best remembered for his observations in 1896 of the mageto-optic phenomenon that almost immediately was named the Zeeman effect. His experimental discovery was not fortuitous, but the fruition of theoretical views that had motivated attempts over a span of thirty-five years to detect some such interaction between magnetism and light. Zeeman's initial observations were beautifully comprehended by H.A.Lorentz' electromagnetic theory, which also served to guide Zeeman in the very early refinement and extension of his discovery. As a result Zeeman and Lorentz shared the 1902 Nobel Prize for physics in recognition of their accomplishment and of the promise, since overwhelmingly fulfilled, of the Zeeman effect for contributing to the understanding of spectra and the particulate structure of matter." (DSB).

Shanghai, Huadong shifan daxue chubanshe, 1986 - 2001. 8vo. 10 volumes, all in publisher's uniform full cloth bindings with gilt lettering to spines and front boards. All volumes with presentation inscription from the translator to Niels Bohr's son, Ernest Bohr: "To Mr. Ernest Bohr with / highest respect from / GeGe". A fine and clean set of the first 10 volumes of Niels Bohr Collected Works. First Chinese, and overall, translation of 'Niels Bohr Collected Works' with dedication inscription from the translator ot Bohr's son Ernest Bohr. Translator Prof. Ge Ge found Bohr’s personality and mode of thinking in harmony with traditional Chinese culture, which may be part of the explanation for his lifelong dedication to Niels Bohr and his work, and his great effort to translate and publish the only non-English edition of the Niels Bohr Collected Works in existence today. The first volume in English had appeared in 1972, and Ge Ge was able to publish a Chinese translation in 1986, fourteen years later.Ge Ge’s enthusiasm not only led to the Collected Works being published with impressive promptness in China, but no doubt provided additional motivation for the Director of the Niels Bohr Archive to prepare the volumes faster. In this way, Ge Ge had an influence even on the publication of the original edition. In 2001 Ge Ge received the prestigeousDanish Order of the Dannebrog “for hiscontribution to increasing the Chinese understanding of Danish science and promoting the Denmark-China scientific cooperation. He was in fact able to translate all the volumes of the Collected Works, the last volume of which was published in English in 2006. It testifies to Ge Ge’s dedication that he enthusiastically went on with the work in spite of having lost his eyesight; he died the following year. The volumes contain the following: Vol. 1: Early Work (1905-1911) Vol. 2: Work on Atomic Physics (1912-1917)Vol. 3: The Correspondence Principle (1918-1923) Vol. 4: The Periodic System (1920-1923)Vol. 5: The Emergence of Quantum Mechanics (mainly 1924-1926) Vol. 6: Foundations of Quantum Physics I (1926-1932) Vol. 7: Foundations of Quantum Physics II (1933-1958) Vol. 8: The Penetration of Charged Particles through Matter (1912-1954)Vol. 9: Nuclear Physics (1929-1952) Vol. 10: Complementarity beyond Physics (1928-1962)

Amsterdam, George Gallet, 1698 (+) Amsterdam, Lorme, 1699. 8vo. In a nice contemporary Cambridge-style mirror binding with five raised bands and richly gilt spine. Small paper-label pasted on to top of spine. Lower part of front board with small hole in leather, showing the wooden boards underneath. With a few occassional brownspots. Line of imprint trimmed off in the second work and small tear to the map ('Relation du voyage de Mr Evert Isbrand'), otherwise a nice and clean copy. (6), 164, (4) pp. + frontispiece and 8 engraved plates; (4), 249, (1) pp. + folded map. Wanting the frontispiece. First French translation of Adam Brand’s ‘Relation du voyage’, an 18-month journey to Beijing where he served as the embassy’s secretary. In 1692, Tsar Peter the Great commissioned Eberhard Isbrand Ides to lead a mission to the Kangxi Emperor of China, with Adam Brand functioning as the embassy's secretary. The delegation, comprising over 250 individuals including noblemen, advisors, merchants, and soldiers, arrived in Beijing after an 18-month journey in 1693. The embassy's primary accomplishment was securing permission for Russians to conduct business in Beijing with a caravan of up to 200 members every three years. The present work became extremely popular in Western Europe and it was quickly translated into various European languages including English (1698 and 1707), French (1699), Dutch (1699) and Spanish (1701). Withbound is Prideaux' "La Vie de Mahomet".

Geneve, Leonardi Chovët, 1677. Folio.. Cont. full vellum, with an old professional rebacking in vellum. 5 raised bands. Remains of ties. Engraved portrait as frontispiece (on verso of halftitle). (10),483,(24);(8),114,(12) pp. A small repair to titlepage of vol. 2, no loss. Throughout light browning. Fortius became the leading physician to the imperial Court of emperor Leopold in Venice. The above 2 works are his main contributions to medicine. - Not in Waller, Wellcome, Brunet, Graesse. - NBG: 18:p. 214.

Kjøbenhavn, 1852 - 53. Indb. i et sædeles nydeligt nyere hldrbd. i gl. stil m. rig rygforgyldn. Ubeskåret. Komplet m. begge smudstitelblade (smudstitelbladet til anden samling er på noget varierende, men samtidigt papir), begge titelblade, begge indholdsfortegnelser og alle alle særskilte deltitelblade til de enklte historier. Nogle blade brunplettede, men et særdeles nydeligt ekspl. Originaludgaven af begge Historie-samlinger. Indeholder i alt otte historier i originaltryk, heriblandt "Det er ganske vist!", "Paa den yderste Dag", "Hjertesorg", "Nissen hos Spekhøkeren".BFN 606, 616.First edition of both "Story"-collections, bound in a very nice later hcalf in old style w. gilt back. Uncut and fully complete w. all titles, half-titles and contents-leaves. Some pages brownspotted, but a very nice copy, containing eight stories printed for the first time.

Weimar, Landes=Industrie=Comptoirs, 1805. Contemp. hcalf. Spine gilt, title- and tomelabel with gilt lettering. A very smal nick to lower compartment. A small tear to top of spine. "Anhang" unbound but stitched. X,676 pp. and 2 folded engraved maps. Anhang: (4),IV,196 pp. First German edition. (Bibliothek der neuesten und wichtigsten Reisebeschreibungen...hrsg. von M.C. Sprengel, fortgesetzt von T.F. Ehrmann, Bd. 25. u. 26.: 1. Theil.). Also having the series-titlepages, these with a stamp.

Kiøbenhaffn, (Peter Haake paa Joachim Moltkens Bekostning), 1650. Lille 8vo. Nyere hpergamentsbind med titlen i kalligrafi på ryg. Originalt marmorert snit. Fællestitelbladet trykt i rød/sort. Med alle 5 deltitelblade.(16),569,(5);(2),165,(4);(4),256,(2);(12),73,(1);(8),37,(1);(7),368,(10) pp. Lidt ormehuller i margin af 1. del. Titebladet kantrepareret og forstærket på bagsiden. Lettere brugsspor, men et ganske velbevaret eksemplar. Sidste udgave af Henrik Smiths berømte lægebog. Dette eksemplar er varianten med kolofon: Paa Joachim Moltkens Bekostning. - Bibl. Danica I:799.

Lancaster PA, American Physical Society, 1958. Royal8vo. In the original blue printed wrappers. In "The Physical Review", Volume 110, Second Series, Number 4, May 15. Previous owner's stamp to front wrapper, otherwise a very fine and clean copy. Pp. 965-967. [Entire issue: Pp. 793-997]. First printing of Finkelstein's landmark paper in which he identified the Schwarzschild surface as an event horizon, "a perfect unidirectional membrane: causal influences can cross it in only one direction". This did not strictly contradict Oppenheimer's results, but extended them to include the point of view of infalling observers. Finkelstein's solution extended the Schwarzschild solution for the future of observers falling into a black hole. This paper influenced Penrose and Landau and essentially triggered the black-hole research."Many prominent doubting physicists were reluctant to accept the concept of a black hole, in large measurement because of the anomaly that the implosion of a star cannot be observed. Yet a particle inexorably falls into the center at r = 0 just as time marches on - because in general relativity time and space exchange roles inside a black hole (which has the making of another paradox). One solution, or at least reconciliation, of the observational black hole paradox was achieved only in the last decades. David Finkelstein (in the present paper) ascertained a new reference frame of framework for Schwarzschild space-time. Finkelstein's reference frame simultaneously covered all regions of space-time from the imploding star to distant reaches of space. This all-embracing reference frame is now called the Eddington-Finkelstein frame" (Kreitler, Trends in Black Hole research, P. 6).

Berlin, Haude et Spener, 1848-52. 4to. No wrappers as extracted from "Mémoires de l'Academie Royale des Sciences et Belles-Lettres", tome II (1846), tome IV, tome VI a. tome VI. Pp. 182-224, pp. 249-291, pp. (361-) 378, pp. 413-416 and 1 folded engraved plate. First apperance of d'Alembert's 3 importent papers on the Calculus of Integration, a branch of mathematical science which is greatly indepted to him. He here gives the proof of THE FUNDAMENTAL THEOREM OF ALGEBRA, called d'Alembert's theorem, and later corrected by Gauss (1799).The theorem is based on these three assumptions:Every polynomial with real coefficients which is of odd order has a real root. (This is a corollary of the intermediate value theorem. Every second order polynomial with complex coefficients has two complex roots. For every polynomial p with real coefficients, there exists a field E in which the polynomial may be factored into linear terms.Also with an importent paper by Leonhard Euler "Mémoire sur l'Effet de la Propagation successive de la Lumiere dans l'Apparition tant des Planetes que des Cometes" (Memoir on the effect of the successive propogation of light in the appeareance of both comets and planets). Pp. 141-181 and 2 folded engraved plates. - The paper is founded on Euler's theory of light as waves and not as particles. It is from the same year as his fundamental work on light as waves: "Nova Theoria" - Enestroem E 104.

4to-oblong. All orig. wrappers, loose as issued in publisher's cloth box. No 18 of 88 "sur vélin de Rives", a total of 100. With 32 original lithographs in colour, all signed by the artist.

Amsterdam, G.& J. Blaeu, 1638. Folio. Samt. hollandsk helpergamentsbind, forlagsbind med stor blindtrykt roset på begge permer. Øverste 2 cm. af ryg fint repareret. Lidt slid ved hjørner. Det 3. værk også med det andet titelblad, her indsat forrest. Kobberstukket portræt af Meursius ved Simon de Pas. (6),118 - (6),133 - (6),87 - (4),150,(2) - (4),112 pp. Frisk, rent eksemplar. Samlingsbind bestående af 5 værker, alle udgivet af Blaeu- Ehr.-Müller V:377 anfører ikke tryk 4 og 5, ej heller Bibl. Dan. III:13-14.

Leipzig und Berlin, B.G. Teubner, 1913. Orig. green printed wrappers. Frontwrapper nearly loose but without loss. Backstrip faded. Very small nicks to spineends. IX,(1),169,(1) pp. + Publishers catalogue. Textillustrations. Internally clean and fine. Scarce first edition. As privatdozent Hermann Weyl had given a course on Riemann's theory of functions; but instead of following his predecessors in their constant appeal to intuition for the definition and properties of Riemann surfaces, he set out to give to their theory the same kind of axiomatic and rigorous treatment that Hilbert had given to Euclidean geometry. Using Hilbert's idea of defining neighborhoods by a system of axioms, and influenced by Brouwer's clever application of Poincare's simplicial methods (which had just been published), he gave the first rigorous definition of a complex manifold of dimension 1 and a throughout treatment (without any appeal to intuition) of all the questions regarding orientation, homology, and fundamental groups of these manifolds. "Die Idee der Riemannschen Fläche" (1913) immediately became a classic and inspired all later developments of the theory of differential and complex manifolds.(J.Dieudonne in DSB).

London, John Weale, 1840-1842. 4to. Uniformly bound in four contemporary half calf bindings with red leather title-label with gilt lettering to top of front board. Gilt stamp to front board, two stamps to verso of front board and one small stamp to title-pages. A fine set. [Appendix A & B:] IV, 32 pp. [Appendix C:] 24 pp. [Appendix D:] IV, 67 pp. + 1 folded plate. [Appendix E & F:] 23, (1) pp. The rare appendixes, separately published, to the important "Treadgold on the Steam Engine and on Steam Navigation". Tredgold's work on the steam engine was long considered the best and most complete work of its kind. "Few details of engine design escaped Tredgold's attention . . . his book is a curious combination of fact, theory, and speculation, and its author uses every opportunity to display his mathematical knowledge. Yet it undoubtedly was a notable contribution to steam engine design and theory in its day" (Finch Engineering Classics pp 104-110). "Thomas Tredgold (1788-1829) was a self-taught engineer. He trained as an apprentice cabinetmaker in Durham and then in Scotland before moving to London to work at his uncle's firm of architects. There he began an intense programme of self-improvement, reading books on engineering, chemistry, mineralogy, geology and mathematics. Perhaps unsurprisingly, Tredgold died relatively young from exhaustion.Tredgold's last major work was on The steam engine, published in 1827. In his preface, he apologises that his book appears to be rather large for its subject matter but explains that 'though confined to a single source of power, that power is gigantic …':" (Devon & Exeter Institution)

London, Knaplock and J. Tonson, 1724. Folio (355 x 240 mm). Uniformly bound in two nice contemporary full Cambridge-style bindings with six raised bands and gilt lettering and ornementation to spine, spine possibly rebacked preserving much of the old spine. Small paper-label pasted on to top of spine, indicating the inventory number in an estate-library. Corners bumped and a few dots and marks to boards. Title-page in vol. 1 detached, otherwise internally very nice and clean. XXVI, 457, (1), (14) pp. + frontispiece and 5 plates and maps; XVIII, 518, (62) pp. A very nice copy, finely bound, of the seventh edition of Prideaux’s highly popular work covering the historical interval between the Old and New Testaments spanning from the conclusion of the biblical era to the emergence of Christianity. Delving into detailed depictions of Jewish culture, religion, and politics, the book also analyzes the origins and development of both the Old and New Testaments. In the mid- and last half of the 18th century it was regarded as being essential reading for those intrigued by the foundations of Western civilization and the historical development of the Jewish people.

Venice, Aldus Manutius, 1502 (-1503). 8vo. (15x10,3 cm). Bound in a later cardboard binding with gilt spine. Gilt title label to spine. Wear to hinges and edges, and boards slightly rubbed. Corners bumped. Part of A1 with printed title cut out and pasted on to a blank leaf that has been inserted before A2. Exlibris pasted to inside of front (Fr. Chasté & Richard Zoozmann) and back (Richard Zoozmann) board. With W.H. Riehl's ownership signature (dated Augsburg 1852) to verso of pasted-in leaf at the front and to colophon-leaf. Scattered notes and underlinings in a near-contemporary hand, otherwise clean. With Aldus' woodcut printer's device to colophon. Upper right corner (blank) of colophon-leaf restored. Zoozmann's ownership signature and various notes in different hands to verso of colophon-leaf. Title-page missing and without the four leaves (with contents etc.) from the first issue (that are sometimes present, sometimes not). 211 leaves (out of a maximum of 216: [*]4A12 B-Z8 aa-cc8). The rare second issue of the Aldus-edition of Valerius Maximus' 'Factorum et dictorum memorabilium libri ix'. Towards the end of 1502, Aldus received a manuscript from Johann Spiesshaymer, the addresee of the introductory letter of the second issue, containing several additional chapters of the text (four chapters of 'De neglecta religione', 'De simulata religione' and 'De auspiciis'), previously unknown to Aldus, which led him to publish a second issue less than a year after the appearance of the first. To this second issue Aldus added, in addition to the newly discovered passages, a subtitle ('Exempla quatuor et viginti nuper inventa ante caput de ominibus') and an introductory letter to Johann Spiesshaymer. The first quire (A) of the second issue is thus the only deviation from the first printing. The present copy lacks the first four leaves, i.e. the title-page, the introductory letter to Jan Lubanski and the table of contents. Valerius Maximus' 'Nine Books of Memorable Deeds and Sayings', written in the reign of Tiberius, is a collection of moral and philosophical exempla. The copy belonged to the prominent German professor and novelist Wilhelm Heinrich Riehl (1823-1897) and carries his ownership signature to verso of the first leaf. Adams II, 303, 83; Renouard 1502.10.

Franckfurt, Knochen, 1705. 8vo. Uniformly bound in two contemporary full calf bindings with four raised bands and gilt lettering to spine. Small paper-label pasted on to top of spines. Wear to extremities. Leather cracked, boards with scratches and head of spine on vol. 1 chipped. Internally with occassional light foxing, but generally internally nice and clean. Title-page in vol. 1 detached. (16), 870, (32) pp. + frontispiece. (16), 916, (13) pp. Later edition of this influential work by Pufendorf, first published in 1683 during his period in Sweden. Here Pufendorf examine the various nations and their individual motivations. He saw states as having distinct personalities each driven by an interest that shaped how they were governed and how they behaved. "In 1682, Samuel Pufendorf published his treatise Einleitung zu der Historie der Vornehmsten Reiche und Staaten so itziger Zeit in Europa sich befinden (…). This book included a short reference to the early beginnings of mankind, which combined biblical and Aristotelian perspectives: 'To the time of the deluge', Pufendorf suggested, there was no magistracy, but 'the Government was lodged only in each Father of his Family, a Paternal Government', which might have continued 'for a considerable time after the deluge'. Here, the biblical account was combined with a more or less ethnographic approach. But this period was not at the centre of Pufendorf's interest, since, as the title of his book already indicated, he focused on the development of modern states and societies. For his purposes, for the analysis of present political and legal developments, biblical history was nothing more than a vague reference point" (Godfrey 207-08). The work was published numerous times throughout the 18th century.

Leipzig, Johann Ambrosius Barth, 1855, 1857, 1859, 1862. Without wrappers as issued in "Annalen der Physik und Chemie. Hrsg. von J.C. Poggendorff". In 6 orig. parts (Heften) from vols. 96, 100 (2 Papers), 101, 108 a. 117. all with titlepage to the respective volumes. - The parts: pp. 373-512 a. 2 folded engraved plates - pp. 1-176 a. 2 engraved plates - pp. 481-660 a. 2 engraved plates. - pp. 161-320 a. 1 engraved plate. - pp. 193-368 a. 3 engraved plates. - pp. 529-660 a. 2 engraved plates.The Bunsen & Roscoe papers: pp. 373-394 - pp. 43-88 - pp. 481-516 - pp. 235-263 - pp. 193-273 - pp. 529-562. A small tear to one titlepage. All issues fine and clean. First printing of these 6 papers constituting the classical photochemical researches, - the papers laid the foundation for the science of quantitative photochemistry."Between 1852 and 1862 Bunsen collaborated with Sir Henry Roscoe on photochemical research involving the chemical combination of equal volumes of hydrogen and chlorine when they were illuminated.For this experiment they altered a reaction vessel devised by John Draper in 1843. Bunsen and Roscoe found that for some time after the experiment started - a time they called the induction period - no reation took place; then the reaktion rate slowly increased until a constant rate, proportional to the intensity of the light source used, was reached. The effect of the incident light was related to the wavelenght and followed a law of inverse squares.....(they) determined that the energy of light radiated by the sun in one minute is equivalent to the energy needed for the conversion of 25x10 with a potens of 12 cubic miles of a hydrogen-chlorine mixture into hydrogen chloride."(DSB II, pp. 589).The papers contains the description of the ACTIONOMETER, which measures the heating power of electromagnetic radiation. The main use is to measure solar energy for meteteorological applications, Bunsen and Roscoe made this invention in order to carry out their researches here.The famous "BUNSEN BURNER" is first described here (in vol. 100 pp. 84-86). This invention furnished Bunsen & Kirchhoff with a non-luminous gas-flame of failrly high temperature, in which chemical substances could be vaporized and a spectrum could be obtained, due purely and simply to the luminous vapour.Leicester & Klickstein "A Source Book in Chemistry", pp. 355-360).

Franckfurt, Jacobi di Zetter, 1644. Folio. Later hcalf. No title to spine. Stamp on foot of title-page. 2 engraved title-pages with letterpress. (12),145,(3); (8),71,(5) pp. Without the 24 plates. A faint dampstain to some leaves in inner margins, otherwise clean. Second Ferman edition. The first part deals mainly with the artillery and its technical aspects and the second part with fireworks.The Italian physician, alchemist and cartographer, Alexis of Piedmont or Girolamo Ruscelli, was born in Viterbo, Italy around 1500 (perhaps earlier), and died in Venice, Italy around 1565. He is (probably) the author of the important "Secreti", published in 1555, and the "Secreti Nuovi", published in 1567, the first of which was extremely popular and of considerable influence, the second of which must be said to be of the greatest interest, but apparently not very widely read. He also translated the Geography of Ptolemy into Italian, and his books on war and fire-works are now quite scarce. Most of his works were popular in his life-time and the century to come, and they were translated into Latin, German, French and Welsh. At a very early point he indicated the plan of a scientific academy, and he must be said to be a very interesting 16th century scientist. Cockle, 663.

Örebro, Nils Magnus Lindh, 1809-10. 4to. Ubeskåret i 2 originale blå papbind. Rygge fornyet. Kobberstukket frontispiece (mezzotint) visende Adam og Eva i Edens Have. Værket omfatter 8 Afdelinger (Däggande Djur - Fåglar - Amfibier - Fiskar - Insekter - Maskar - Växter - Mineralier), hvor teksten og plancherne til de forskellige afdelinger er selvstændigt paginerede og nummererede, ialt ca. 500 pp. samt 80 kobberstukne og håndkolorerede plancher med ialt 367 afbildninger. Tekst såvel som plancher i fin stand. Marginal brunplet på de første få blade i bind II.

[Presumably Copenhagen, 1776, but nothing is stated] Folio (330 x 220 mm). In contemporary half calf with gilt lettering to spine. Stamp to title-page and a few numbers written in pencil to title-page. Written in a fine, generally legible hand, but unidentified, in brown ink. On good thick paper, clean and fine. 42 ff. of text, text only on recto of leaf.

Köln am Rhein, Kosten des Verfassers, (17939. 4to. Contemp. hcalf. Gilt spine. Title-label with gilt lettering. A paperlabel pasted on lower part of spine. Stamps on title-page. Stamped monogram of the Danish King Frederik VI on inside frontcover. (10),140,168,56,76 pp., 1 folded table and 20 folded engraved plates. Some scattered brownspots, mainly on the first leaves. First edition. - Klaus Jordan, 104.

Frankfurt am Main, Apud Johannem David. Zunnerum et Nicolaum Wilhelmum Helwig,1702. Small folio. Very nice recent blue hcalf w. gilt lettering on spine. Title-page printed in red and black, w. woodcut vignette and stamp: "Jews college, London". Some brownspotting, but all in all a very nice copy. (12), 184, (8) (Index) pp. Second edition of Ludolfus' groundbreaking Ethiopian Grammar. The German, Job Ludolf, was the first to bring the study of Etiopian subjects into a system, and his present work is the first of its kind to see the light of day. It was unusal for the time to take up the study of something like the Ethiopian laguage, and after Ludolfus' important philological works followed a long period of neglect, which did not end till the second half of the nineteenth century, when these studies were finally resumed, causing them to flourish. Brunet III, pp. 1223.

London, Harrison and Sons, 1930 a. 1932. Royal8vo. 2 contemp. full cloth. A stamp to verso of titlepages. In: "Proceedings of the Royal Society", Series A, vol. 129 and vol. 137. V,698,XXXVIII pp., plates, textillustr. and portraits. + V,724, plates and textillustr. (Entire volumes offered). Cockcroft & Walton's papers: pp. 477-489, textillustr. a. 1 plate (vol. 129) + pp. 229-242, textillustr. and 1 plate (vol. 137). Firs appearance of these two milestone papers in nuclear physics recording the set up of the first proton accelerator and describing the first nuclear reaction brought about artificially. the first paper describing the sccelarator, the second the nuclear reaction. their experiment with the accelerator is regarded as the first demonstration of the mass-energy equivalence. cockcroft and walton were awarded the nobel prize in 1951."Cockcroft, with the assistance of Walton, devised aninstrument in 1929 that could built up voltages(a voltage multiplier) and, in so doing, accelerate protons (which are easy to obtain by ionizing hydrogen atoms) to energies higher than those of natural alpha particles. In 1932 Cockcroft and Walton mbombarded lithium with such protons and produced alpha particles. It was clear, that what they had done was to combine lithium and hydrogen to form helium. This was the first nuclear reaction brought about through artificially accelerated particles and wihtout the aid of any form of natural activity....Both during and after World War II, Cockcroft was engaged in work having to do with the development of the atomic bomb. And, as it happened, his very first artificially-induced nuclear reaction, that of lithium with hydrogen, proved to be of GREAT IMPORTENCE IN THE DEVELOPMENT OF THE HYDROGEN BOMB."(Asimov).Sigmund Brandt "The Harvest of as Century", Episode 50.