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2.Aufl. Lpz.,(1909). Orig.hcalf. XXVII,750 pp.

Paris, Briasson, 1738. 8vo. Uniformly bound in two very nice Cambridge-style mirror bindings with five raise bands and richly gilt spines. Gilt super ex-libris to front boardes. A few scratches to extremties but overall a very nice and clean set. XXIV, 563 pp.; VIII, 443, (4) pp. Brunet I, 640.

Leipzig, B.G. Teubner, 1872. Cont. hcalf. Gilt back, slightly rubbed. XI,348 pp. First edition of Helmert's main work. "He became famous for his work on the mathematical and physical theories of higher Geodesy and for his book on the adjustment of observations "Die Ausgleichungsrechnung...1872". He supplemented this book with several papers on error theory..." (A. Hald).

(København), 1834. 4to. 2 samt.hldrbd. Rygforgyldning. Forgyldte titel-og tomefelter. En papirsetiket påsat øverst på rygge. Stempler på titelblade. (8),323;VIII,314 pp. samt 3 kobberstukne foldekort. Indvendig ren og trykt på skrivepapir.

Berlin, 1828. Cont.hcalf. XII,676 pp. Some stains and browning. Lower right corner of title lost, pp.81-82 lacking.

N.Y., D. van Nostrand, 1883. Cont. full cloth. Top a. bottom of spine a little frayed. One corner bumped. Stamp on title. 270 pp., 5 fold. wood-engraved plates and 177 illustr. in the text (of electrical machines, Edison-lamps, telegraphy etc.). Publishers announcements bound at end. 16 pp. First edition.

Freib.im Breisgau, 1834. Bound in 9 very nice cont.hcalf with gilt backs. St.o.t.

Kiøbenhavn, Simmelkiær, 1785. Lille 8vo. Samtidigt hldrbd. med rig rygforgyldning. Øvre kapitæl slidt. Lille stempel på titelbladet. (4),160 pp. Bibl. Danica II,561. - Sabin, 13512.

Lund, C.F. Berling, 1799. Smukt nyere hldrbd. med rig rygforgyldning og skindtitel. (8),685,(21) pp. Gl. ejernavn på titelbladet. Lidt spredte brunpletter.

Kiøbenhavn, Hegelunds Forlag, 1789. Samtidigt helldrbd. i flammet kalv med overdådig rygforgyldning. Rygtitel fornyet, forgyldt. (4),460 pp. Trykt på skrivepapir. Første danske udgave

(London, Harrison and Sons, 1893). 4to. No wrappers as extracted from "Philosophical Transactions" 1892 - Vol. 183 - Series B., Pp. 311-370 a. 7 fine lithographed plates. textillustr. First printing of an importent work in the taxonomy of dinosaurs and extinct reptilia. Harry Govier Seeley was a British paleontologist who determined that dinosaurs fell into two great groups, the Saurischians and the Ornithischians, based on the nature of their pelvic bones and joints. He published his results from 1888 and onwards.

København, J.H. Schultz, 1827. Lille8vo. Samt. hshirtbd. 12,74,(1) pp. trykt på skrivepapir. Titelbladet repareret i nederste venstre hjørne uden tab. Eksemplaret har tilhørt filologen H.G. Wiwel og har en del sider med tilskrifter i blyant. Originaludgaven.

Nürnberg, Göpners, 1745. Contemp. hcalf. richly gilt spine. Raised bands. A small tear in leather at lower part of backcover. Marbled edges. (16),256,(32) pp. Internally clean and fine.

Amsterdam, 1917-20. 8vo. Bound in 4 cont. hcloth.

London, The Admiralty, [No date, but around 1830]. 8vo. In later half cloth binding with title in gilt lettering to front board. Stamp to first leaf. Leaves repaired in margin. Occassionally brownposttet. 8 pp.

Kjøbenhavn, C. Steen, 1840. Senere hldrbd. Rygforgyldning og rygtitel. (4),446 pp. Nogle ark med bruning af siderne, p.g.a. papirkvaliteten. First Danish edition of "Nue Reise um die Welt in dem Jahren 1823, 24, 25 und 26".

Kiøbenhavn, Thiele, 1777. 4to. Samt. helldrbd. med rig rygforgyldning og forgyldt titeletiket. Stempel på titelbladet. Kobberstukket titelvignet(24),976 pp. Der hører et kort til værket, som mangler her. Ehrencron-Müller, Holberg bibliografi I,248. - Bibl. Danica II,600.

No Place, no printer, 1807. Contemp. hcalf, spine gilt, titlelabel with gilt lettering. Stamp on titlepage. Engraved frontispiece. XXXIV,304 pp. and 3 engraved plates (Mirabeau, Sieys, Bailly in full figure). Internally clean and fine.

Sth., 1909. Lex8vo. 2 orig.røde helshirtbd.m.dekor.på permer og rygge. 668,596 pp. Tekstillustr., plancher og kort. Originaludgaven.

Berlin, Christiani, 1821. 4to. Contemp. blue boards, clothbacked later. 296,(214) pp., 4 folded tables, 1 folded engraved plate, 1 folded engraved map, handcoloured. Scattered marginal brownspots.

Kjöbenhavn, C.A. Reitzel, 1836. 8vo. Nydeligt senere hldrbd. i flammet kalv. Forgyldt skindtitel på ryg. XII,700,XXIV pp. Indvendig ren og frisk. Mindre stempel øverst på titelbladet (Nationalbanken i Kjøbenhavn). Udgået herfra. Originaludgaven.

Braunschweig, Schulbuchhandlung, 1794. Cont. marbled boards. Titellabel with gilt lettering on spine. VI,120 pp. With 7 double-page plates of original music by the composers Schulz and Grönland. A few scattered brownspots. printed on good paper. First edition.

(London, Bulwer and Co., 1811). Large 4to. Without wrappers as extracted from "Philosophical Transactions of the Royal Society of London." Year 1811-Part I. Playfair's memoir: pp. 347-377 and 1 large folded engraved plate. Clean and fine, broad margins. First appearance of Playfair's investigations on the Schehallien mountain in Scotland.John Playfair first visited the Scottish mountain, Schiehallion, during Nevil Maskelyne's 1774 plumbline deflection experiment, which was conducted to measure the density of the Earth. The mathematician Charles Hutton analysed the survey data from the experiment, reporting the mean Earth specific gravity as 4.5 in 1778. Playfair undertook a lithological mapping exercise in 1801, to improve the accuracy of Hutton's estimate, and reported a range of 4.564.87 in 1811. The computation of the gravitational effect of topography with variable subsurface density effectively made him the creator of the first geophysical model. As such, not only was Playfair's Schiehallion contribution pioneering in itself, but it was representative of his more significant works in both mathematics and geology, in that he built on existing benchmark work with novel and valuable additions of his own. Although Playfair's map of the extent of the Schiehallion quartzite was quite accurate, the Society's fourth President, John MacCulloch, having visited Schiehallion, was dismissive of Playfair's representation of the subsurface density variation. MacCulloch spent several years searching Scotland for a more favourable site for a plumbline experiment, travels that allowed him to compile the data for his 1836 geological map of Scotland. (John R. Smallwood).

K., 1868. Med helt guldsnit i orig. bogtrykt kartonnage. Ryg m. lidt brugsspor. Indvendig helt frisk. BFN 978. Originaludgaven, yderst sjældent forekommende i denne stand.

Copenhagen, 1956. 4to. Smukt privat hldrbd. Schepelerns eget eksemplar, diverse materiale vedlagt. 222 pp. samt 92 plancher med beskrivelser.