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Dessau, Aue, 1845-47. 2 contemp. hcalf. Gilt spines. Gilt lettering. Stamps on title-page. Labels pasted on lower part of spines. XXVI,227;VI,374 pp.

København, Gyldendal, 1912-16. 2 samtidige hshirtbd. De originale bogtrykte foromslag påsat forpermerne. Stempler på titelblade. XXIV,254;(4),276 pp. Rigt illustreret og med kortbilag.

Brevet er primært en kritik af O.W.s bog, også en tak til O.W. "for de så meget overdrevent venlige Ord, De har skrevet foran. (At nogle i deres Ungdom kan være mig TAKNEMLIGE, er muligt, STOLTE bør de være af en Styrke og et Geni som Johs.V.Jensens, af en Kunnen og Kunst som Rings)". Om værket siger K., at det er et ordentligt fremskridt, og løsrevet fra Bangs og Rings inspiration. "Der er virkelig noget sølv-fint inde i den bog"..."ejer et lille glimt af den Skønhed, der er Fare, og den Fare, som er Skønhed. men De må læse bedre Korr.! De må alvorligt talt give Dem bedre Tid til at lære Dem selv at kende."...

Landshut, Thoman, 1830. Small 8vo. Later clothbacked boards. (6),178,(2) pp.

Kiøbenhavn, M. Hallager, 1778. Samtidigt hldrbd. med rygforgyldning og rygtitel i skind. Forreste indre fals lidt svag. (4),572 pp. De første tre blade med en brunskjold.

Amsterdam, Janssonius u. Valkenier, 1655. 12mo. Cont. full vellum. Engraved frontisp. (22),280 pp. + Index and Sleswicensis et Holsatiæ Ducatum. Descriptio Nova. Amsterdam, 1655. 95 pp. The plates are lacking.

K., 1849. Smukt nyere helldrbd. m.oph.bd.på ryg og rygforgyldn. 442 pp. - Originaludgaven.

(Paris, L'Imprimerie Royale, 1725). 4to. Without wrappers. Extracted from "Mémoires de l'Academie des Sciences. Année 1723". Pp. 295-306. First appearance of Dufay's first work. "His first academic paper (1723), on the mercurial phosphorus, already displayed the characteristics which distinguished his later work: full command of earlier writings, clear prescriptions for producing the phenomena under study, general rules or regularities of their action, thorough study of possible complications or exceptions, and cautious mechanical explanations of a Cartesian flavor. This "phosphor" - the light sometimes visible in the Torricelli space when a barometer is jostled - much perplexed the physicists of the era, primarily because it did not always occur under apparently identical conditions. Dufay found that traces of air or water vapor occasioned the failures, which could be entirely eliminated with a technique of purification taught him by a German glassmaker. He explained the light in terms of Cartesian subtle matter squeezed from the agitated mercury; although he knew the work of Francis Hauksbee (the elder), he suggested no connection with electricity."(DSB).

Kria., 1921. 3 orig. helshirtbd. Tekstillustr. og mange plancher.

London, John Maxwell and Comp., 1864. Small 8vo. 2 nice solid later full cloth. XIII,387;II,360 pp. and 1 folded engraved map. First edition.

[No place], 1955. 8vo. Without wrappers (as issued). Offprint, seperately paginated, from "Il Nuovo Cimento", Serie X, Vol. 2, Novembre. Very fine and clean. 41 pp + 1 blank. Offprint of Davies' (and 36 co-authors) famous report on the G-stack experiment: how many measons excisted with a mass of about 1000 m. "In the 1954 experiment 250 sheets of emulsion, each 37x27 and 0,6 mm thick were packed together seperately only by thin paper. The package was 15 cm thick and weighed 63 kg. It was flown over nothern Italy support by a ballon at 27 km for six hours. Because of a parachute failure on descent about 10% of the emulsion stack was damaged but the remainder was little affected. This endeavor marked the start of large collaborative efforts. In all, there were 36 authors from 10 institutions". (Bederson, "More Things in Heaven and Earth: A Celebration of Physics at the Millennium").

Kjøbenhavn, Schubothe, Trykt hos Sebbelow og Breum, 1809 + 1811. 2 meget nydelige samt. ensartede hshirtbd. m. rygforgyldn. Som vanligt brunplettet grundet papirkvaliteten. Den ikke almindeligt forekommende originaludgave.

Nimes, Paris, Pierre Beaume, 1784. Small 8vo. Cont. full calf. Richly gilt back. Top of spine gone. Some scratches on covers. XII,417 pp. On good paper. This edition is supplemented with "Memoire pour les Etudes des Missions Orientales" etc.

Lancaster, American Physical Society, 1956. Lex8vo. Volume 28, April, No. 2, 1955 of "Reviews of Modern Physics". Entire volume in the original printed orange wrappers. Previous owner's name to upper margin of front wrapper. A 2 cm long tear to upper left corner of front wrapper. Otherwise a very nice and clean copy. [Elasser:] Pp. 135-163. [Entire issue: Pp. 103-170]. First printing of Elsasser's paper on the Hydromagnetic Dynamo Theory. Elsasser, considered the father of the presently accepted dynamo theory as an explanation of the Earth's magnetism, proposed that this magnetic field resulted from electric currents induced in the fluid outer core of the Earth. He revealed the history of the Earth's magnetic field through pioneering the study of the magnetic orientation of minerals in rocks."His [Elsasser] main attention became focused on a research field he had been cultivating almost as a diversion alongside his official duties since the late 1930s: geomagnetism. Discounting a hypothesis popularized by Einstein and Patrick Maynard Stuart Blackett that Earth's magnetic field is a property of its rotation per se, he thought instead of a self-sustaining dynamo in the molten metallic core. A key clue for Elsasser in his approach to the problem was a similarity between maps of the long-term variations in Earth's magnetic field and the maps of atmospheric flows familiar from his work in meteorology. Elsasser theorized that Coriolis forces and convection currents in the conductive liquid combined to produce poloidal magnetic and toroidal electric fields (the former extending beyond Earth's surface, the latter interior to it) that had a feedback effect on each other. Though some details were unclear, he argued that the dynamo theory gave the right order of magnitude for the magnetic field's strength and potentially accounted for its secular variations. By the mid-1950s, Elsasser's junior colleague at Utah, Eugene Newman Parker, and the British physicists Edward Crisp Bullard and the Australian-born George Keith Batchelor had explored alternative dynamo models and elaborated the mathematics showing that the field was self-sustaining. The dynamo theory ultimately received wide acceptance. It subsequently also became a key element of Hannes Alfvén's Nobel Prize-winning work on plasma electrodynamics. In the 1960s, Elsasser's geophysical interests moved into modeling seismic deformation in the context of the burgeoning theory of plate tectonics." (DSB)

Leiden, Brill, 1969-71. Royal8vo. 2 orig. full cloth. Dustjackets with tears. Stamp on titles. VIII,690,(1);VI,715 pp. Fine and clean.

New York, American Telephone and Telegraph Company, 1963. 8vo. Volume XLII, January, Number 1, 1963 of "The Bell System Technical Journal". In the original printed blue wrapper. Previous owner's stamp to front wrapper. Spine slightly discoulered and lower right corner slightly bumped. A nice and clean copy. Pp. 79-94. [Entire issue: 206 pp]. First publication of MacWilliams Identities, or the MacWilliams Equation, which became the starting point for a considerable amount of research in coding theory and cryptology by the Bell System. MacWilliams Identities are essentially a set of linear relations of weight distribution which specifies the number of words of each possible Hamming weight. The development of the MacWilliams Identities had profound influence in practical as well as theoretical cryptology. "Another major theoretical advance was F. J. MacWilliams's discovery in the 1962 [the present paper, published in January 1963] of a set of fundamental equations [now called the MacWilliams Identities] that any linear code must satisfy. These identities were the starting point for a considerable amount of research by MacWilliams, C. L. Mallows, N. J. A. Sloane, and others". (Millman, A History of Engineering & Science in the Bell System, 1984, p. 54)."MacWilliams (1917-1990) was a mathematician who contributed to the field of coding theory. She was born in Stoke-on-Trent, England and studied at the University of Cambridge, receiving her BA in 1938 and her MA in the following year. She spent most of her career at Bell Labs, where she worked on error-correcting codes and co-wrote The Theory of Error-Correcting Code with Neil Sloane." (Codings: Webster's Quotations, 42 p.)The issue contains the following papers:1. Beach, C.D.; Trecker, J.M. A Method for Predicting Interchannel Modulation due to Multipath Propagation in FM and PM Tropospheric Radio Systems. Pp. 1-36.2. Bodtmann, W.F.; Ruthroff, C.L. A Wideband Transistor IF Amplifier for Space and Terrestrial Repeaters Using Grounded-Base Transformer-Coupled Stages. Pp. 37-54.3. Coyne, J.C. Monitoring the Percussive Welding Process for Attaching Wires to Terminals. Pp. 55-78.4. MacWilliams, Jessie. A Theorem on the Distribution of Weights in a Systematic Code. Pp. 79-94.5. Peck, D.S.; Blair, R.R.; Brown, W.L.; Smits, F.M. Surface Effects of Radiation on Transistors. Pp. 95-129.6. Graff, H.J.; Peacock, J.M.; Zalmans, J.J. Development of Solderless Wire Connector for Splicing Multipair Cable. Pp. 131-153.7. Gordon, E.I.; Rigden, J.D. The Fabry-Perot Electrooptic Modulator. Pp. 155-179.8. Pfahnl, Arnold. Properties of Fast-Decay Cathode-Ray Tube Phosphors. Pp. 181-201.

Amsterdam, North-Holland Publishing Company, 1968. 8vo. Original yellow full cloth with the original dust-jacket. In "Logic, Methodology and Philosophy of Sciences III". Library stamp to pasted down front free end-paper. Dust-jacket with some wear and minor nicks, otherwise a fine and clean copy. Popper's paper: Pp. 333-373. Hintikka's paper: Pp. 311-331. [Entire volume: XII, (2), 553, (1)]. First edition of Popper's important work on "the third world", a significant part of the "Popperian Cosmology". The present work, together with Popper's "On the Theory of the Objective Mind", also published in 1968, constitutes an important contribution to what is known as Popperian cosmology, in which Popper divides the world into three parts. "Epistemology Without a Knowing Subject" explores the third world."The main topic of this lecture will be what I often call, for want of a better name, "the third world". To explain this expression I will point out that, without taking the word "world" or "universe" too seriously, we may distinguish the following three worlds or universes; first, the world of physical objects or of physical states; secondly, the world of states of consciousness, or of mental states [...]; and thirdly the world of objective contents of thought, especially of scientific and poetic thoughts and of works of art. Thus what I call "the third world" has admittedly much in common with Plato's theory of forms or ideas, and therefore also with Hegel's objective spirit, though my theory differs radically, in some decisive respects. It has more in common still with Bolzano's theory of a universe of propositions in themselves and of truth in themselves, though it differs from Bolzano's also. My third world resembles most closely the universe of Frege's objective contents of thought." (Popper, Karl. Epistemology Without a Knowing Subject, pp. (333))."In "Epistemology Without a Knowing Subject" Popper offers a "biological" argument for doubting that minds and bodies exhaust all the entities inhabiting the human world. Not only is man a conscious animal, he is also a being whose communicative capacity has evolved to the point of being able to describe and criticize his encounters with the world" (Fuller, Steve. Social Epistemology, Indiana University Press, 1988, p. 51).Karl Popper still exercises extensive influence on a variety of different thinkers, scholars and economists. The billionaire investor George Soros claims that his investment strategies are modeled upon Popper's understanding of the advancement of knowledge through the distinctly Hegelian idea of falsification.

Züllichau und Freistadt, Darnmann, 1801. Contemp. hcalf. Gilt spine.Titlelabel with gilt lettering. A paperlabel pasted on top of spine. Stamps on title-page. XVI,(2),232 pp., 1 folded engraved plate. A few scattered brownspots.

Berlin, Stockholm, Paris, F. & G. Beijer, 1892-93. 4to. Without wrappers as extracted from "Acta Mathematica. Hrdg. von G. Mittag-Leffler.", Bd. 16. Including the title page. Fine and clean. (6), 64 Pp. First printing of Zorawski's important paper which is one of the very first responses to Sophus Lie's group theory. "One of the first mathematicians who reacted to Lie's newly introduced concept was Kasimir Zorawaski, a polish scientist who worked in Warsaw. As examples of differential invariants, Zorawski mentioned Gauss curvature, Beltrami operators, and Minding's geodesic curvature. Similar to Lie, he asked for the number of invariants of different orders. From then on, two concepts played a major role within the theory of differential calculus, initiated by Ricci, and the group concept that was introduced by Lie and improved by Zorawski." (Earman, The Attraction of gravitation: new studies in the history of general relativity, P. 229)

(Leipzig, Baumgärtner, 1821). 4to-oblong. (22 x 28 cm.). Contemp. hcalf. With 22 fine engraved plates (Carl Eickemeyer del.). Faint scattered brownspots.

Kjøbenhavn, Forfatterens Forlag, 1831-(33). Lille 8vo og lille 4to. Tekst i senere marmoreret papbd. Plancherne, ialt 33 kobberstukne, er ubeskårede. tekst somvanligt brunplettet. Originaludgaven af de tre første hefter. Der skulle udkomme fire gange to hefter med ialt 100 versfabler og samme antal illustrationer; der udkom dog kun tre gange to hefter og således kun 75 versfabler og 75 illustrationer. "teksten er direkte oversat efter Gellert, Lichtwer, Gleim o.s.v., hvis navne dog ikke nævnes... De haandkolorerede illustrationer blev stukket efter tegning af kendte kunstnere." (Inger Simonsen, s. 38).

Leipzig, Hinrichsen Buchhandlung, 1838. Later hcalf, gilt back with a paperlabel pasted on back. Stamp on title. X,390 pp. and 1 double-page lithographed plate as frontispiece. Some scattered brownspots.

Washington, Government Printing Office, 1873. Royal8vo. Orig. full calf. Gilt boders and gilt lettering on covers. Gilt spine. Lithographed frontispiece in colour. XVI,107,203,26,8 pp., 3 lithographed colourplates (one large folded).

Berlin, Boike, 1829. Cont. hcalf. Gilt back. Paperlabel pasted on upper compartment of back. Lithographed titlepage with battlescene and a printed. Stamp on title. XXIV,400 pp., 2 folded tables, 8 folded engraved maps and large folded view of Schumla.

(København, ca. 1840). Stor 4to. Samtidigt hshirtbd. Skindtitel på forpermen. Indeholder 20 litograferede portrætter i stort format (34x27 cm.) Svage marginale brunpletter på nogle plancher, ellers ren og frisk. Portrætter af Chr. I, Dronning Dorothea, Johannes, Chr. II, Fr.I, Chr. III, Frederik II, Dronning Sophia, Christian IV, Frederik III, Chr. V, Fr. IV, Chr. VI, Fr. V, Chr. VII, Fr.Arveprinds, Fr. VI, Chr. VIII, Fr. Carl Chr. og Caroline Charlotte Mariane.