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(Paris, Gauthier-Villars), 1894. 4to. No wrappers. In: "Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences", Tome 118, No 25. Pp. (1371-) 1442. (Entire issue offered). Le Chatelier's paper: pp. 1401-1411. First printing of the milestone paper in which Stieltjes introduced the "Stieltjes Integral". He is often called "the father of the analytic theory of continued fractions" for his work in this area. "On 18 June 1894 he published Recherches sur les fractions continues in Comptes Rendus de l'Académie des Sciences. A fuller version of this work appeared in the Annales de la Faculté des Sciences de Toulouse." The integral which he introduced here while solving the moment problem, that is, given the moments of all orders of a body, find the distribution of its mass.".... a mathematical milestone. The work represents the first general treatment of continued fractions as part of complex analytic function theory; previously, only special cases had been considered." (Encyclopaedia Britannica).Parkinson "Breakthroughs" 1894 M.

Leipzig, Joh. Ambrosius Barth, 1819. Without wrappers. In "Annalen der Physik. Herausgegeben von Ludwig Wilhelm Gilbert", Neueste Folge, Bd. 32, Fünftes Stück. (The entire issue offered). Titlepage to vol. 32. Pp. 1-114. Scoresby's paper: pp. 1-58 and 1 folded engraved map "Karte des Groenländischen Meeres" (17x24 cm.). Gilbert Spitzbergen: pp. 59-67, Krusenstein et al.: pp. 67-71. Clean and fine. This issue contains also a paper by E.F.F. Chladni: "Einige Ideen über das Innere Erde", pp. 72-80, in which he set forth the view that the core of the earth is melted iron. - A paper byFaraday: "Ueber das Vestium oder Sirium", pp. 80-92. First German edition.

Paris, Briasson, 1753. Contemp. full mottled calf. Richly gilt backs in compartments. Lower compartmen with a paperlabel pasted on. Stamp on titlepage. XV,(2),174,(2) pp. and 17 large folded engraved plates (maps and plans). Clean and printed on fine paper.

Kjøbenhavn, Schultz, 1814-16. Indbundet ensartet i 4 nyere smukke hldrbd. med ophøjede bind, rygforgyldning, forgyldte skindtitler samt blinsdtrykte dekorationer i alle rygfelter. Med det kobberstukne portræt af Ewald, tegnet og stukket af C.F. Clemens, samt alle 21 kobberstukne plancher. Med de "anstødelige" 6 kobbere til første bind af Abildgaard, resten af Chodowiecki. Flot rent og velbevaret eksemplar på skrivepapir.

(London, W. Bowyer and J. Nichols, 1777). 4to. Extracted from "Philosophical Transactions", Year 1777. Vol. 67 - Part I. Pp. 296-349 and 1 folded engraved plate. Wide-margined, clean and fine. First printing of Mudge's importent paper in which he describes his new mechanical methods of making parabolic mirrors, and introducing af new composition of the alloy. Like his modern counterparts, Mudge created an apparatus to minimize the role of the technician and the possibility of errors. "On 29 May 1777 Mudge was elected a Fellow of the Royal Society, and in the same year was awarded the Copley medal for his ‘Directions for making the best Composition for the Metals for reflecting Telescopes; together with a Description of the Process for Grinding, Polishing, and giving the great Speculum the true Parabolic Curve,’ which were communicated by the author to the society, and printed in the Philosophical Transactions (1777, lxvii. 296). The ‘Directions’ were also issued separately by Bowyer (London, 1778). Sir John Pringle, the president, in making the presentation, remarked that Isaac Newton had predicted the role of mechanical devices in making parabolic mirrors."(Wikipedia).

Hafniæ, Godiche, 1767. 45,5x55 cm. Kobberstukket kort over Viborg Stift med stor dekorativ kartouche. Nogle små marginalrifter repareret. En rift som går ind i billedfladen rep. på bagside, uden tab. Trykt på kraftigt skrivepapir. Kortet har været foldet. Kortet blev udgivet i Pontoppidans "Den Danske Atlas", Bd. IV, 1768. Stukket af I. Haas. Første specialkort over Viborg Stift.

(Kiöbenhavn, 1764). 54x43 cm. Kobberstukket grundplan af København indenfor Voldene, visende bebyggelsen i 1764. Med spor efter foldning, men iøvrigt ren og frisk, trykt på svært skrivepapir Grundplanen udkom i Pontoppidan's "Danske Atlas" Tome II, 1764.

Stockholm, (1898). 4to. Samt. hldrbd. med rygforgyldning. Ene fals itu. (6),XV,343 pp. samt 69 kromolitograferede tavler. Anker No. 270. Wood p. 421.

London, Charles Knight, 1849-50. Royal8vo. Bound in 2 nice contemp. hcalf. Richly gilt spines, tome-and titlelabels with gilt lettering. (Manderson, Binder, Brighton). VIII,599;XII,721,(2) pp., 16 steel-engraved portraits and 12 large folded engraved maps, cold. in outline. Internally fine and clean.

Berlin, Julius Springer, 1926. 4to. Contemp. hcloth. Some wear to binding. "Die Naturwisenschaften. Hrsg. von Arnold Berliner. Vierzehnter Jahrgang". XXVIII,1286,44 pp. Einstein papers: pp. 223-224 and 300-301. Bohr paper pp. 1-10. The whole volume offred. All 3 papers in first edition. - Weil Nos 150;154.

Paris, Garnier Freres, 1870-73. Bound in 4 uniform contemp.hcalf., spines gilt, title-and tomelabels. One label with some loss of letters. The first volume having a dampstain in lower margin of leaves. Otherwise clean and fine.

London, R.H. Laurie, 1821. 8vo. Contemp. clothbacked blue boards. Printed titlelabel on frontcover. stamps on title-page. VI,134 pp., 1 table, textillustrations in woodcut.

Schleswig, J.G. Röhss, 1798-1800. 8vo. 4 cont. hcalf. Richly gilt backs. Title-and tome labels in leather, gilt. Backs rubbed. Taperepair to top of spine on one volume. Stamps on titles. X;438;XXIV,852;LIV,717,(78);XXIV,534 pp. With 3 (of 4) folded engraved plans and 17 large folded engraved maps and plans.

Berlin, Hempel, 1857-61. Lex8vo. 3 contemp. hcalf. Gilt spines. gilt lettering. Spines a bit rubbed. Stamp on title-pages. Chromolithographed frontispiece. IX,870;XVIII,1130;XV,1341 pp. many lithographed maps, plates and facsimile. Volume one with traces of use.

Paris, Michel Brunet, 1702. Small 8vo. 2 contemp. full calf. Raised bands. Richly gilt spines. Light wear to top of spines. Stamp on title-pages. (52),449,(3);(2),435 pp. Clean and fine.

Berlin, 1900. Lex8vo. Orig.pict.cloth. XXIV,363 pp.

København, Schultz, 1827. Lille 8vo. Samtidigt hshirtbd. Rygforgyldning og forgyldt titel. 12,74,(1) pp. Spredte brunpletter. Af en tilskrift på fribladet fremgår, at bogen er overrakt som gave af Rask. "Föræret af besta Vännen Broder R.K. Rask. 1832./ J.R.Burd" Originaludgaven. - Rask Bibliografi I,101.

Odense, 1823. Lille 4to. Ubeskåret i nyere helshirtbd.m.guldtryk på ryg. Litograf.titelblad. Bertelsen nr. 8. Originaludgaven.

Uden år, ca. 1920-30. 4to. (26x24 cm.). Leporello i originalt helshirt. På forpermen i guld "Frøbelsk "Skole" ved Frølen Mary". Med 29 plancher i kartonneret leporello-form hvorpå originale mønstre i papirklip, syning, fletning, tegning etc. De to sidste kartonblade ser ud til at mangle nogle tegninger. Original mønsterbog som forlæg til de arbejder i syning, fletning etc. som skulle beskæftige børnene i de frøbelske asyler, hvor den pædagogiske hovedvægt blev lagt på børnenes egen-beskæftigelse. Mønsterbogen er udført i de originale materialer.I 1910 er der seks "skolebørnsasyler" beregnet for skolebørn i København. Her bliver børn efter skoletid beskæftiget med lektielæsning, leg, sang, håndgerning - for pigernes vedkommende: Strikning, syning og arbejde med papir eller pap - for drengene: Kurvefletning, børstenbinderi og arbejde med træ og linoleum. Grunden til fritidshjemmene er lagt.Manden bag var Friedrich Fröbel (1782-1852), der både havde ulejliget sig med at finde på navnet og et pædagogisk indhold. Fröbel: Tyskeren, der opfinder børnehaverne og udvikler den første selvstændige førskolepædagogik. Er discipel af Pestalozzi, men modsat denne lægger han afgørende vægt på elevernes egen-virksomhed.Fröbels tanker inspirerede, og 1. maj 1871 oprettede cand.jur. Niels Juel-Hansen og hans hustru Erna Juel-Hansen en rigtig Fröbel-børnehave i Kvæsthusgade 7 i København. Ni år senere åbner fru Hedevig Bagger den tredje børnehave i København. Samme fru Bagger bliver senere den første rektor for Fröbelseminariet. (Se "Børn og Unge", 2003 nr. 51)

..revisa ab J.J. Schlierbach. Hafniæ,Preussius,(1737). Recent full cloth. (16), Ø r(6) PP- Carl var Christian VI's livlæge fra 1736-42. Bogen er en of de første danske værker i patologi.

(Stockholm, F.& G. Beier), 1885. 4to. Orig. printed wrappers (to Acta Mathematica 4:3). Extracted from "Acta Mathematica", Vol. 4. Pp. 201-312. Clean and fine. First appearance of a major paper on differential equations of the first order"...the whole theory of automorphic functions was from the start guided by the idea of integrating linear differential equations with algebraic coefficients. Poincaré simultaneously investigated the local problem of linear differential equation in the neighborhood of an "irregular" singular point, showing for the first time how asymptotic developments could be obtained for the integrals. A little later (1884, the paper offered) he took up the question, also started by I.L. Fuchs, of the determination of all differential equations of the first order (in the complex domain) algebraic in y and y' and having fixed singular points; his rechearches was to be extended by Picard for equations of the second order, and to lead to the spectacular results of Painlevé and his school at the beginning of the tweentieth century."(DSB).

Stockholm, Carl Délen, 1805. Lidt senere hldrbd. Rygforgyldning. Forgyldt rygtitel. (4 incl. subskribentliste),602,(2) pp, 12 kobberstukne foldeplancher. Et blad (pp. 527/28) i samtidig afskrift. På skrivepapir.

Kjøbenhavn, Brummer, 1811. Samtidigt hldrbd. Rygforggyldning. Titel- og tomefelter forgyldt. Øverste kapitæl slidt. Revne i forrerste fals. Stempler på titelbladet. (8),160,(4),230 pp. Indvendig frisk. Originaludgaven.

Kjøbenhavn, (ca. 1730). 4to. Samtidigt hldrbd. Rygforgyldningen svag og ryg med lettere brugsspor. 480,(8);116,(4) pp.

(Paris, L'Imprimerie Royale, 1744). 4to. Without wrappers as extracted from "Histoire de L'Academie Royale des Sciences", L'Annee 1744, pp. 191-238 and 2 folded engraved plates. First edition. "The Abbé La Caille was an immensssely industrious observational astronomer whose career was climaxed by a scintific expedition to Cape of Good Hope; his studies here made him "the father of of southern astronomy", and his names for fourteen southern constellations remain as his most enduring monumnt." His results in measuring the parallax of the moon, especially from Cape of Good Hope - provided an exact computation of the earth-moon distance - indicating a distance to the moon of about 60 times the earth's radius.