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Randers, Elmenhoff, 1839. 12mo. Fint vel-bevaret samt.helshirthd. Bertelsen 23. Godt eksemplar of originaludgaven. Heri bl.a. "Skytten paa Aunsbjerg".

Paris, Sebastien Cramoisy, 1680. 8vo. In contemporary full calf with five raised bands and richly gilt spine. Edges of boards gilt. Small paper-label pasted on to top of spine. Light wear to extremities, scratches to boards. Head of spine with minor loss of leather, showing headbands. Internally nice and clean. (12), 84, 179, (1), 242, (2) pp. Uncommon second edition on the origin of the third dynasty of the Kings of France.

Geneve, Paris, Barde, Manget & Compagnie, - Buisson, 1787-88. 9 contemp. full calf. Gilt spines, gilt borders on covers. Spines worn and 2 covers detached from spines. Internalyy clean and fine, printed on good paper. With the large folded engravd map.

Amsterdam, Juxta Exemplar Parisinum. 1690. 4to. Contemp. full vellum. Upper part of backcover soiled and cracking to backhinge at upper end. Ms title on spine. Engraved frontispiece. Engraved titlevignette. (26),864 pp. + Index. 6 last leaves of index with browning and holes in outher margin. Free endpapers at end defective.

Helsingør, Kongel. allene privil. Bogtrykkerie, 1767. Lille 8vo. Samtidigt hellæderbind i flammet kalv. Rig, men svag, rygforgyldning. Forgyldt titeletiket. nederste kapitæl slidt. Ryg med brugsspor. (16),470,(2) pp. Trykt på skrivepapir. Lettere brugsspor. First Danish edition of Young's "The Complaint: Or Night Thoughts on Life, Death, & Immortality."

Leipzig, Theophilo Georgi, 1729. 8vo. In a nice contemporary Cambridge-style mirror binding with four raised bands and richly gilt spine. Small paper-label pasted on to top of spine. Light wear to extremities. A nice copy. (46), 750, (2), 181, (83) pp. + frontispiece. Third edition.

Frankfurt am Mayn, 1817. Contemp. hcalf. Richly gilt spine. A large label taped to spine. Old inscription on title-page. (16),XXXXII,300,(4) pp., 4 large folded engraved plates with many figures. Faint scattered brownspots. First edition.

London, Printed by Taylor and Francis - Published by the Author, (1862-) 73. Folio. Papersize 54,5x36,5 cm. Lithographed and fully handcoloured. The bird on a branch, fruits and foliage.. J. Gould & H.C. Richter, del. et lith. - Walter, Imp. Fine and clean. The plate is accompanied with the original textleaf. (2) pp. This is an original plate from Goulds great work "The Birds of Great Britain", issued between 1862 and 1873. The plates in this work were executed by Gould himself, and a few by J. Wolf, H.C. Richer and Hart. Together with Audubon's plates, the Gould-plates are considered the best bird-art ever produced, AND THE PLATES IN HIS "BIRDS OF GREAT BRITAIN" ARE THE PEAK OF GOULD'S ARTISTIC LIFE. In the foreword Gould stresses the difference from his "Birds of Europe" in the treatment of the illustrations, the inclusion here of the figures of the baby birds and nests, and he comments "Many of the public are quite unaware how the colouring of these large plates is accomplished; and not a few believe that they are produced by some mechanical process or by chromo-lithography. This, however is not the case; every sky with its varied tints and every feather of each bird were coloured by hand; and when it is considered that nearly two hundred and eighty thousand illustrations in the present work have been so treated, it will most likely cause some astonishment to those who give the subject a thought.". Elsewhere he remarked upon employing "almost all colourists in London." - Wood p. 364. - Nissen No. 372. - Sitwell 102. - Zimmer pp. 261-62. - Not in Jean Anker.

Cont. hcalf. Gilt back. Stamp on title. 886 pp. Fine and clean.

Berlin, Julius Springer, 1926. Without wrappers as extracted from "Zeitschrift für Physik. Hrsg. von Karl Scheel", Bd. 39, pp. 499-518. With the titlepage to the whole volume. First edition of this importent paper in which Heisenberg - after inventing Quantum Mechanics the year before (1925) - investigates some of the fundamental aspects of the new theory. Heisenberg recognizes the invariance of the wave equation with respect to various transformations. "It is clear that such invariance exists with respect to an interchange of the coordinates of identical particles, e.g. of two electrons in an atom of two nuclei of the same kind in a molecule. As a consequence, the wave function of a non-degenerate stationary state must either remain unchanged or may only change sign when the transformation is applied to it....Indeed, in this way Pauli's exclusion principle for electrons found a formulation in terms of wave mechanics."(K. Kronik in Memorial Volume to Wolfgang Pauli).

Altona, Eckhardischen Schriften, 1786. 8vo. Contemp. full calf. With 4 large clasps and catches with floral engravings, all in silver and fully intact. Floral coloured endpapers with goldstamps. (20),1008,(26) pp. + 96 pp. Title-page slightly soiled, otherwise fine.

Copenhagen, Levin & Munksgaard,1937. 8vo. Uncut in orig. printed wrappers. In: "Det KGL. Danske Videnskabernes Selskab. Mathematisk-fysiske Meddelelser. XIV,10". 40 pp. Fine and clean. First edition of the work in which Bohr introduced his famous Liquid Drop Model of the atom in order to interprete the nuclear structure. (The paper was not continued as Kalckar died the following year)."It had, of course, been clear to Bohr that analogies with atomic spectra could not be of help in interpreting his (earlier) picture of nuclear structure. Peripheral electrons, thinly spread within the atomic volume, can be compared to a dilute gas of particles interacting in pairs only. By contrast Bohr's picture of intranuclear motions of tightly bound nucleons should show 'essential collective aspects', he said. Now, together with Kalckar, he suggested that for nuclei a much more proper comparison would be with a drop of liquid. That analogy should not be taken too literally, the dynamics of a true liquid drop is vastly different from thta of nucleai. Yet the comparison, treated cautiously, was tempting and in the event proved fruitful in many respects, particularly in regard to collective motions."(Pais "Niels Bohr's Times", pp. 339-40)."In the liquid drop model, formulated by Niels Bohr, the nucleons are imagined to interact strongly with each other, like the molecules in a drop of liquid. A given nucleon collides frequently with other nucleons in the nuclear interior, its mean free path as it moves about being substantially less than the nuclear radius. This constant "jiggling around" reminds us of the thermal agitation of the molecules in a drop of liquid. The liquid drop model permits us to correlate many facts about nuclear masses and binding energies; it is useful in explaining nuclear fission. It also provides a useful model for understanding a large class of nuclear reactions." (FAQ).Rosenfeld No 56.

Copenhagen, Königl. Maj. Priv. Buchdruckerey, (1703). Lille 8vo. Samtidigt marmoreret papbind. Ryg med senere påsat shirt. Stempel på titelblad. 132 pp., Reglement: (8) pp., Ordonnance: (8) pp. Yderst sjælden. - Bibl. Dan. I,676.

(Leipzig, Barth),1912. 8vo. No wrappers. In: "Annalen der Physik IV, Bd. 38", No 7. Pp.249-472 a. 3 plates. (Entire issue offered). Einstein's papers: pp. 355-369 and pp. 443-458. Clean and fine. Both papers in first edition, and they are considered as the first appearance of a Nonlinear Field Equation for Gravitation. "Einstein published two remarkable memoirs in 1912 which were efforts to construct a complete theory of gravitation incorporating the equivalence principle. In these memoirs Einstein supposed that the gravitational field can be characterized completely by one function, the local speed of light, analogous to the Newtonian description, where only the gravitational potential appears. By an extraordinary argument he extended the potential equation of Newton...In his second Memoir in 1912, he used the equivalence principle to show the influence of a static gravitational field on electromagnetic and thermal processes." (DSB IV p.320 ff). - Weil No. 47 and 48.

Freyberg, Barthelischen Schriften, 1776. 4to. Cont. hcalf, raised bands, slightly rubbed. (8),224,(22) pp. and 7 large folded engraved plans, partly handcoloured (with numbering I-X). First edition, forming II. Stück (vol. 2) of Teilcke's "Beyträge zur Kriegs=Kunst und Geschichte des Krieges von 1756 bis 1763". - Also having the generel titlepage with engraved vignette.

Kiøbenhavn, Christoph georg Glasing, 1748. 4to. Samtidigt blødt blankt papomslag. Håndskreven titeletiket på ryggen. I senere kassette. XXIV,382,(2) pp. Gl. ejernavn nederst på titelbaldet: H. Drejer. Med Anders Thuborgs exlibris på indersiden af foromslaget. En skjold i ydre margin på de første 4 blade, ellers ganske ren med lette brugsspor. Originaludgaven. af Eilschovs hovedværk, som bygger på den Leibniz-Wolfske skole. Han slår i afdelingen om dyrene et slag for en mere human bahandling af disse.

Leipzig, Johann Ambrosius Barth, 1822. 8vo. Contemp. hcalf. Gilt spine and with gilt lettering. Some scratches to spine. In: "Annalen der Physik und der Physikalischen Chemie. Hrsg. Ludwig Wilhelm Gilbert", Bd. 12 (= Bd. 72 der Reihe). (12),436 pp., 2 folded tables and 4 engraved plates. Small stamp to verso of titlepages. Internally clean and fine, except for browning to upper right corners on the last 75 leaves. Faraday's paper: pp. 113-129. Ampere's appers: pp. 257-276 a. 32-36. First German versions, in Gilbert's preparations, of these fundamental papers by Faraday and Ampére, the papers that established electro-magnetic rotation, the first electromotors. - Apparatus depicted on the plates.The volumes contains further notable papers by Döbereiner, Berzelius, Sertürner etc. etc.

Kbhvn., 1905-33. Lex8vo. 9 hshirtbd. Ialt ca 6.000 pp.

Nürnberg, Raspeschen Buchhandlung, 1801 - 1804. 8vo. Uniformly bound in two contemporary half calf bindings. Vol. 2 missing the title-label on spine. Small paper-label pasted on to top of spine. Light wear to extremities and internally with light occassional brownpostting. VIII, 296 pp. + 6 engraved plates; IV,406,(2) pp. + 8 folded plates and 2 folded tables.

Sorøe, (Jonas Lindgren), 1769. 4to. I samtidigt hellæderbind med fem ophøjede bind på ryg. False svage og permer med slitage. Titelblad med annotation i højre hjørne i senere hånd, ellers indvendig pæn. (14), 318, 96, (1) pp.

Kiøbenhavn, Schultz, 1805. 4to. Unden omslag. En smule brunplettet. 30, (4) pp. Originaltrykket af karantæne-forordning fra 1805, hvor en nyordning af karantænevæsnet blev gennemført bl.a. herunder indførelsen af karatænepasset.

Leipzig, S. Hirzel, 1913. 8vo. Orig. printed wrappers, no backstrip. Wrappers loose. In "Jahrbuch der Radioaktivität und Elektronik", 10. bd., Heft 1. Pp. 1-138 (entire issue offered). Wilson's paper: pp. 34-54, textillustrations, showing apparatus and 5 photographic plates, showing ionizing by Alpha-, Beta- and Röntgen- radiation). Together with the English version - published 1912 in the Proceedings of the Royal Society - this is Wilson's main paper relating "that the track of an ionizing particle might be made visible and photographed by condensing water of the ions which is liberated". The first trails were obtained in 1911 where he submitted a short note of this to the Proceedings. In the offered paper he published the first tracks made by the ionizing particles of alpha, beta and Röntgen-rays. This, Wilson Cloud-Chamber, became an extremely valuable instrument of fundamental research, the discovery of the positron in 1932 and the kaon in 1963 were made by using cloud chambers as detectors."But the whole course of the particle appears infinitely more clearly by the method invented by C.T.R. Wilson in 1911 and named after him. The radiation is allowed to enter an expansion-chamber, containing a gas saturated with water vapour. A sudden expansion of the chamber cools the gas, and cloud-drops are then formed instantly around the ions produced along the tracks of the particles. By suitable illumination these tracks can be made to stand out clearly as if they had been described by luminous projectiles. The "Altmeister" of modern nuclear physics, Lord Rutherford, once called the Wilson chamber "the most original and wonderful instrument in scientific history"."Thomson Rees Wilson (1869-1959), a Scottish physicist, is credited with inventing the cloud chamber. Inspired by sightings of the Brocken spectre while working on the summit of Ben Nevis in 1894, he began to develop expansion chambers for studying cloud formation and optical phenomena in moist air. Very rapidly he discovered that ions could act as centers for water droplet formation in such chambers. He pursued the application of this discovery and perfected the first cloud chamber in 1911. In Wilson's original chamber the air inside the sealed device was saturated with water vapor, then a diaphragm is used to expand the air inside the chamber (adiabatic expansion). This cools the air and water vapor starts to condense. When an ionizing particle passes through the chamber, water vapor condenses on the resulting ions and the trail of the particle is visible in the vapor cloud. Wilson, along with Arthur Compton, received the Nobel Prize in Physics in 1927 for his work on the cloud chamber. (Wikipedia).

Nürnberg, Raspeschen Buchhandlung, 1801-04. 2 contemp. hcalf. Richly gilt spines. Gilt lettering. A paperlabel pasted on lower part of spines. stamp on title-pages. VIII,296;IV,406,(2) pp., 14 folded engraved plans etc. faint scattered brownspots.

Paris, Lucien Laveur, 1909 4to. Bound with orig. printed wrappers in a fine cont. hmorocco, profusely gilt back, raised bands. Portrait in heliogravure. 214,(2) pp., 53 plates, six autographed letters, 22 textillustrations.

København, H. H. Thieles Bogtrykkeri, 1901. Lex. 8vo. Indbundet i et nydeligt halvmaroquinbind med rygforgyldning og fem ophøjede bind. Ryg falmet. Med dedikation fra Gustav Wied på titelbladet: "Fred. Hartvig / fra / Gustav Wied / 2 Aug 1902." Ren og pæn indvendig. (6),X,388,(1) pp. Med tre udfoldelige plancher. Nydeligt eksemplar med egenhændig dedikation fra Gustav Wied til vennen Frederik Hartvig.