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Francofurti, Andreae Wecheli heredes, 1593. 8vo. Contemp. full calf. Spine with raised bands. Wear to the gilt lettering on spine. Wear to extremities and covers detached. Printers woodcut device on title-page. (14),572,(50) pp. Faint scattered brownspots.

Kjøbenhavn, Höpffner, 1757. Samtidigt hellæderbind med fire ophøjede bind og blindtrykte dekorationer på ryggen. Udvendig med en smule slitage, ellers et pænt eksemplar. 281,(7) pp. Anden udgaven, som er et direkte optryk af originaludgave, dedikationen og fortalen er udeladt of tillige på titelbladet ordene: Første Part. retskrivningen er hist og her forandret. Ehrencron-Müller X, 62.

Halle, Officina Crugiana, 1728. Contemp. full vellum. Engraved frontispiece. (30),788,(35) pp., 8 engraved plates. A few scattered brownspots.

London, John Stockdale, 1788. Later full cloth. Gilt lettering on spine. Woodcut frontispiece (Lords of Commons) and with a fox. (4),XVII,74 pp. At p. 68 a large woodcut "The revolution Pillar 1788" with a hanged fox.

Paris, Magimel, AN XIII - 1805. Contemp. hcalf. Gilt spine. Gilt lettering. A paperlabel pasted on upper part of spine. Stamps on title-page. XII,724,(3) pp. Internally clean.

(Washington, Government Printing Office, 1915). 8vo. As extracted from "the Annual Report of the Smithsonian Institution". A fine and clean copy. Pp. 209-216. First printing of Orville Wright's speech on the longitudinal equilibrium, or how to keep the stability of aeroplanes, thus being one of the very first manuals on how to fly an aeroplane. "Although in learning to fly the beginner finds most difficulty in mastering the lateral control, it is his lack of knowledge of certain features of the fore-and-aft equilibrium that leads to most of the serious accidents". (From the introduction to the present speach). The Wright brothers were early on aware of the importance of longitudinal control. Most of the early airplanes - the ones that could actually lift off ground - had the decisive flaw of having bad, in some cases non-existing, longitudinal control which eventually caused the airplanes to crash. In the summer of 1910, the Wright Company introduced what would become their most popular aircraft - the Wright Model B. The Model B was a pusher biplane with wing warping to control roll, like their earlier aircraft. But unlike earlier aircrafts it also had a conventional tail assembly, which gave it better longitudinal stability, and it rested on wheels rather than skids, doing away with the need to launch the aircraft from a rail. This model was produced from 1910 through 1914. In 1911 the U.S. Congress made its first appropriation for military aviation. Four airplanes were ordered and numbers 3 and 4 were Wright Model B's. Both were accepted at Fort Sam Houston, Texas on April 17, 1911.The two brothers were also investigating automatic stability systems. They devised a mechanism that could sense changes in attitude and longitude which would make compensating adjustments to keep the aircraft flying evenly in the desired direction. It consisted of a pendulum, which sensed and controlled roll or yaw, and a vane, which sensed the aircraft's pitch. They applied for a patent for this automatic stabilizing system on February 8, 1908."The culmination of the Wrights’ achievements came with Wilbur’s two flights at New York in 1909. On 29 September, taking off from and landing at Governors Island, he made a circuit of the Statue of Liberty; on 4 October he flew a twenty-one-mile course to Grant’s Tomb and back. After their triumph the brothers quietly turned to teaching others to fly and to directing the Wright Company. They now had many imitators and rivals, and were forced to defend their pioneer patent in the courts." (DSB).

Amsterdam, Wetstein, 1744. Small 8vo. Cont. halfcalf. Richly gilt spine. Titlelabel with gilt lettering. 2 small nicks on spine. Stamp on titlepage. Title in red/black with engraved vignette. XXXII,176 pp.,1 folded engraved plate. Internally clean, printed on good paper.

Kiøbenhavn, Brummers Forlag, 1800-11. Ubeskåret i 4 orig. hollanderede papb. Rygpapiret på Anden del væk. 1.-3. Del med kobberstukne titelblade med portrætvignetter.XIV,(8),419,(1);484,(6);472;X,341 pp. Ren og frisk. Eksemplaret har tidligere tilhørt retshistorikeren Frantz Dahl.Uncut in the four original paper bindings. Paper spine on vol. 2 gone. Vols. 1-3 with engraved title-pages and portrait-vignettes. Nice and clean. XIV,(8),419,(1);484,(6);472;X,341 pp. Originaltrykket af den første danske komplette udgave af Plutarks Levnedsbeskrivelser over de romerske kejsere.

København, 1892. Originalt komponeret gråt helshirtbd. Helt guldsnit. En smule slitage ved kapitæler. Ellers særdeles ren og frisk, også indvendigt. Originaludgaven.

(Paris, Gauthier-Villars), 1891. 4to. No wrappers. In: "Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences", Tome 113, No 2. Pp. (49-) 104 (entire issue offered). Langley's paper: pp. 59-63. Disbound but clean. Tear to one margin, not affecting the text. First appearnce of this pioneering paper in which Langley announced that it is possible, with the motors that we now have, to keep a plane in the air with large speed.In 1891 Langley experimented with steam-engine powered Aerodromes, beginning the series which would lead to the human-carrying machine of 1903. The first of these was designated Aerodrome No. 0 and proved a failure. The second machine, Aerodrome No. 1, was powered by a carbonic acid gas and later by compressed air. Aerodrome No. 2, also built in 1891 was also a disappointment. Aerodrome No. 3 (1892) was of stronger construction and was modified a number of times. A better means of heating the steam was tested on Aerodrome No. 3 and was a decided improvement and was incorporated into Aerodrome No. 4. By the end of 1893 Aerodrome No. 4 was ready for testing and a launching device atop a house boat was built.

Hannover, Helmingschen, 1800. Contemp. hcalf. Wear to extremities. Titlelabel gone. Stamps on foot of title-page. (2),252,(2) pp., 5 large folded engraved plates, of which 4 are handcoloured. Internally fine and clean. First edition. - Poggendorff I,1129.

Viborg, 1795. 8vo. I samtidigt halvlæderbind. Ryg med slitage og indvendig med spradiske understergninger med blyant. Lettere brunplettet. XVI,298,(1) pp. Førsteudgaven af denne topografiske klassiker. Niels Blicher var far til St. St. Blicher. Bibl. Dan. II,709.

Upsala, Regae Academiae Typographi, (1822) 4to. No wrappers as issued. Orig. marbled spine-paper. (4),8 pp. Browning to upper right corner. Scarce first edition of Thunberg's description of some species of the fauna of Surinam from his collections brought home from his great voyage.

A la Haye, Jean van Duren, 1741. Contemp. full calf. raised bands, richly gilt spine. Titlelabel with gilt lettering. A paperlabel pasted on upper part of spine. Stamps on title-page. Title-page in red and black. Engraved frontispiece. (2),166,(2) pp., 24 large folded engraved plates. Clean and First edition. - Klaus Jordan, 166.

Kiøbenhavn, Poulsen, 1805. Samtidigt hellæderbd. i flammet kalv. Rig rygforgyldning. Tome-og titelfelter. Stempel på titelbladet. XXX,452 pp. samt 24 foldede kobberstukne plancher. indvendig ren og frisk, trykt på skrivepapir. Originaludgaven. - Bibl. Danica II:333.

Amsterdam, Henri Schelte, 1702. 8vo. In contemporary full calf with four raised bands and richly gilt spine. Small paper-label to top of spine. Light wear to extremities, scratches to boards. Spine-ends chipped. Internally fine and clean. (22), 315, (5), 342, (10) pp. 9 fullpage engravings. Beautiful later edition, first published the year before in 1702, of Boileau-Despréaux's collected works. Brunet I, 1058: "Jolie reimpression de l'in-4. de 1701, dans laquelle sont ajoutes les passages des poetes latins imites par l'auteur, le Chapelain decoiffe et les deux satires faussement attribuees a Despreaux."

Braunschweig, Friedr. Vieweg & Sohn, 1914. No wrappers. In: "Verhandlungen der deutschen Physikalischen Gesellschaft im Jahre 1914. Hrsg. von Karl Scheel", 16. jahrgang, Nr. 10 a. 11. Pp. (437-) 494 a. (495-) 566. (Entire issues offered). With titlepage to 16. Jahrgang. The papers: pp. 457-467 a. pp. 512-517, 2 textillustr. First apperance of these two groundbreaking papers constituting the famous "Franck-Hertz Experiments" giving the first experimental determination of Planck's constant not using blackbody radiation."Thus, the experiments by Franck and hertz were later considered as a new and independent support not only of Planck's quantum theory and Einstein's light-quantum hypothesis, but also of Bohr's theory of the atom with sationary states of discrete energies. In 1926 Franck and Hertz were awardedthe Nobel prize for 1925."(Siegmund Brandt "The Harvest of a century", Episode 25, p. 102).The Nobel Prize were given "for their discovery of the laws governing the impact of an electron upon an atom".

Leipzig, Weidmanns Erben und Reich, 1762. Contemp. marbled boards. Gilt spine. Titlelabel with gilt lettering. A paperlabel pasted on lower part of spine. Spine with a few minor nicks. Stamp on title-page. Engraved portrait (Sobieski). (6),636,(20) pp. Clean and fine.

Berlin, 1923. Orig. printed orange wrappers. Back strengthend with matching paper. Fresh copy. Offprint/Sonerabdr. aus "Sitzungsberichte". pp. 369-364. First edition. Weil No. 137.

4to. All orig. wrappers in publisher's box. No 194 of 350 "pur fil Lafuma", a total of 401. With 20 full page heliogravures and 90 in the text.

Wien, Strauss, 1813-14. 2 contemp. hcalf. Gilt spines. Gilt lettering. Spines slightly rubbed. Stamp on title-pages. XXIV,288,294,XII;XX,334,360 pp. Internally fine.

Kbhvn., 1824. Samt. hldrbd. Ryg lidt slidt og øverste del repareret. 226 pp. Som altid lettere brunplettet.

Stuttgart, Mezler, 1780. Contemp. marbled boards. Spine gilt. Titlelabel with gilt lettering. A paperlabel pasted on spine. Stamp on title-page.(14),416 pp., 6 folded engraved plates. Internally clean and fine.

(Paris, Bachelier), 1837. 4to. No wrappers. In: "Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences", Tome V , No 17. (Entire issue offered). Pp. (567-) 572. Dumas & Liebig's paper: pp. (567-) 572. First appearance of a historical paper in chemistry. stating a new way to organize organic chemistry.When Liebig visited Paris in 1837, he persuaded Dumas to accept the ethyl theory, and in a joint memoir (written by Liebig) presented on 23 October 1837 to the Paris Academy (the paper offered) they asserted that "in inorganic chemistry the radicals are simple; in organic chemistry they are compounds - that is the sole difference. The laws of combination, the laws of reaction, are the same in the two branches of chemistry" (Partington, vol. IV, p. 351)."In the paper "Note on the present state of organic chemistry" .... (Dumas and Liebig)) claim to have found the key to systematically organizing organic chemistry, basing research not on the elements, as in inorganic chemistry, but on the radicals. The radicals in organic chemistry act analogous to the elements in mineral chemistry, with the same general principles of combination and reaction."(Partington "Breakthroughs" 1837 C).

(Stockholm, F.& G. Beier), 1885. 4to. Orig. printed wrappers (to Acta Math. 7:3). Extracted from "Acta Mathematica", Vol. 7. Pp. . Clean and fine. First printing of Minkowski's doctorial dissertation, which he received from Königsberg."From his Grand Prix paper (on five squares integers) to his last work Minkowski never ceased to return to the arithmetic of quadratic forms in n variables ("n-ary forms"). Ever since Gauss' pioneering work on binary quadratic forms at the beginning of the nineteenth century, the generalization of his results to n-ary forms had been the goal of many mathematicians including Eisenstein, Hermite, Smith, Jordan, and Poincaré. Minkowski' most importent contributions to the theory were for quadratic forms with rational coefficients, through a system of three invariants of the form and (in a later paper) a paper from 1905."(DSB).