HENRY SOT HER AN & CO., 140, STRAND, W.C, and 43, PICCADILLY, W. 515 



10326 KUHNEN (Fr.) Hvdrostatische Hohenvergleichungen von 4 Festpunkten auf dem 

 Telegraphenber<;e bei Potsdam ; with 7 plates, 4to. seivn, 4s 7iicht im Handel, Berlin, 1908 



10327 , und Philipp FURTWANGLER : Bestimmung der absoluten Grosze [_sic\ der 



Sciiwerkraft zu Potsdam, mit Reversionspendeln ; ^vith 4 plates, 4to. sewn, 10s %d 



nicht im Handel, ibidem, 1906 



10328 KUMMER (Ernst Eduard ; f.r.s.) Sur les Diviseurs de Certaines Formes de Nombres 

 qui resultent de la Theorie de la Division du Cercle, traduit par Jules Houel, 4to. (pp. 18), 

 sewn, Zs 1860 



10329 Uber die EINFACIISTE Darstellung der aus EiNHEITSWURZELN GEBILDETEN COM- 



plexen Zahlen, welchedurch Miiltiplikation mit Einheiten bewirkt werden kann, Svo. (pp. 12), 

 sewn, U Qd [Berlin,^ 1870 



10330 liber eine Eigenschaft der Einheiten der aus den Wurzeln der Gleiehung a^ — i 



gebildeten complexen Zahlen und iiberden zweiten Faktor der Klassenzahl, Svo. (pp. 26), 

 sewn, 2s ib., 1870 



10331 Uber die aus 31ten Wurzeln der Einheit gebildeten complexen Zahlen, Svo. 



(pp. 12), spwn, 2s ib., 1870 



10332 iJber die Flachen vierten Grades, auf welchen Schaaren von Kegelschnitten 



liegen, Svo. (pp. 15), sewn, 2s Qd ih., 1863 



10333 Ueber die Wirkung des Luftwiderstandes auf Korper von verschiedener 



Gestalt, insbesondere auch auf die Geschosse ; loith 2 plates, 4to. (pp. 57), hoards {scarce), 

 5s ib., 1875 



10334 KUNCKEL [v. LOWENSTJERN] (Johann) Ars Vitraria Experimentalis, oder 

 voUkommeneGlasmacher-Kunst . . . Die allerkurtz-biindigsten Manieren, das reineste Chrystall- 

 Glas, alle gefjirbte oder tingirte Gliiser, kiinstliche Edelstein oder Fliisse, Aniausen oder 

 Scbmeltze, Doubleten, Spiegeln, das Tropff-Glas, Ultraniarin, Lace- und ander niitzliebe Mahler- 

 Farben . . . zu machen . . . Sarat eineni II. Hanpt-Theil, mit mehr als 200 Experimenten vom 

 Glasmahlen, Vergulden und Brennen, vom Hollandischen Kunst- und Borcellan-TOpflfer- 

 werk, Glas-brennen . . . mit einem Anhange von den Perlen und fast alien natiirlichen 

 Edelsteinen ; indieserlll. Edition um ein merkliches vermehret ; with portrait, engraved title, 

 and numerous other fine engraved plates, besides woodcuts, 4to. old hf. calf {back of binding 

 damaged, and partly water-stained) ; RARE, 17s Qd Niirnberg, 1743 



This classic work on glassmaking contains the author's discovery of ruhy glass, basides a large number of useful 

 recipes. The plates afford a very accurate picture of contemporary processes. 



10335 KXJNDT (August Adolf, Berlin) Vorlesungen Uber Experimentalphysik, lierausgegeben 

 von Karl Scheel [mitlBiographie von G. Schwalbe] ; with portrait, coloured plate, and 534 

 illustrations, large Svo. (pp. 876), hf. cl., 10s 6d (p. M. 15 sewn) Braunschweig, 1903 



Considered as models of lectures on experimental physics. The author, who was the successor of Helmholtz at 

 Berlin University, invented a number of new apparatuses to illustrate his lectures. 



10336 KUNTZE (Wilhelm Friedjich, Pastor zu Dippoldiswalde) Quadratur der Segmente des 

 CiRKELS nacli der Art des Hippocrates ; with folding plate, 4to. boards, uncut {rare), lOs 6d 



Dresden, 1792 

 A very painstaking * correct ' solution which was unknown to Professor de Morgan. 



10337 KUNZ (George Frederick, U.S. Geological Survey) Gems and Precious Stones of North 

 America : a Popular Description of tlieir Occurrences, Value, History, Arclifeology, and the 

 Collections in which they exist, also a Chapter on Pearls and on Remarkable Foreign Gems 

 owned in the United States, with 24 plates (8 beautifully coloured), and 20 smaller 

 illustrations, impl. Svo. cl., uncut (scarce), £1. 10* (p. £2. 12* 6d) New York, 1890 



' As a treatise from the liand of an expert in the uses and values of minerals concerned, it possesses an interest and 

 importance which the work of a simple mineralogist, however learned or skilful, could not claim.' — Engineering and 

 Mining Journal. 



10338 The PRODUCTION of Precious Stones in the United States, 1895-9, with coloured 



plates, 7 parts in 1 vol. impl. Svo. hf. red morocco {as good as new), with author's inscr. to Prof. 

 Hilary Bauerman, lOs Washington, 1900 



10339 1898 and 1899, with coZowrerfp/a^e, 2 parts impl. Svo. sewn, 3s6rf ibidem, 1899-1900 



10340 , and Charles BASKEBVILLE : The Action of Radium, Actinium, Roentgen 



Rays and Ultra-Violet Light on Minerals and Gems, roy. Svo. (pp. 32), sevm, with author's 

 inscr., 2s New York, 1903 



10341 KUPFERSCHLAEGER (Isidore, Univ. Liege) NOTICE sur TACTION du Fer et du Zinc 

 dans les Dissolutions des Mdtaux dont les Oxydes sont solubles dans I'Ammoniaque, Svo. (pp. 15), 

 sewn, 2s Liege, 1860 



10342 Tableaux des Caracteres Pyrognostiques que pr<^sentent les Substances 



Minerales traitdes seules on avec les Rdactifs, 4to. sewn, 2s ibidem, 1860 



10343 KURB (Johann Gottlob v.) Das Mineralreich in Bildern : naturhistorisch-technische 

 Beschreibung und Abbildun*,' der wichti<,^3ten Mineralien ; with 24 finely COLOURED plates {some 

 heightened with gold and silver), folio, original boards (scarce), £1. Is Stuttgart, 1858 



10341 The Mineral Kingdom, a-lth 24 finely coloured plates {some heightened loith gold 



and silver), folio, hf. morocco (SCARCE), £1. 5* Edin., 1859 



10345 Another Copy, hf. morocco {name on title, and back badly damaged), £1. Is 



A work remarkable for its exquisitely coloured plates. 



10346 KYAN (John Howard) On the Elements of Light, and their Identity with those of 

 Matter, Radiant and Fixed, with^ plates {one coloured), roy. Svo. cl. {scarce), \2s 6d 1838 



This work was apparently unknown to Professor de Morgan, who did not include it in his Budget of Paradoxes. 



The author was once well known as the inventor of the kyauizing process for preserving wood, especially for railway 

 sleepers, by treating it with corrosive sublimate (perchlodride of mercury), a subject chosen by Faraday for his inaugural 

 lecture at the Royal Institution. 



