HENRY SOTHERAN & CO., 140, STRAND, W.C, and 43, PICCADILLY, W. 803 

 Mathematics, continued: — 



15944 DOSTOK (Georges, de. Vlnstitut Catholiqne) Elements de la Tiieorie des Determinants, 

 avec Application a I'Ali^ebie, la Trigonometrie et la Geometrie analytique, dans le Plan et dans 

 I'Espace, 2*-' [derniere] Edition, 8vo. hf. black morocco neat, cL sides, t. e. g. {nice copy), %s (p. F. 8 

 nett sewn) ^ ' 1883 or 1905 



15945 Th^ORIE Generale des Polygones Etoilies ; with diagrams, 4to. buckram [o.p.), 



45 1880 



15946 DREW (William Henry, pr. : St. John's Coll., Cantab.) Geometrical Treatise on Conic 

 Sections, with diagrams ; with Solutions, 2 vols, post 8vo. cl. {Solutions o. p.), 4s (p. 9* 6d) 1898-68 



15947 DROBISCH (Moritz Willielm; Prof. Philosophy and Mathematics, Leipzig) Erste Grund- 

 lehren der mathematischen Psychologie ; with folding plate, 8vo. cl., Zs 6d Leipzig, 1850 



15948 DKONKE (Adolf) Einleitung in die hohere Algebra, 8vo. buckram, 2s Qd (p. M. 5. sewn) 



Halle, 1872 



15949 Die Kegelschnitte in SYNTHETISCHER Behandlungsweise ; tvith diagrams^ 8vo. 



buckram, Is 6d Leipzig, 1881 



V. Baltzer, ante. 



15950 DUHAMEL (Jean Marie Constant, de Vlnstitut) Elements de Calcul Infinitesimal, 

 2e Edition ; with 6 folding plates, 2 vols. 8vo. in 1, hf. roan {some pp. of v. II damaged), 3s 1860-1 



15951 DTJPORCQ, (Ernest, ing^nicur des tcUgraphes) Premiers Principes de Geometrie Mo- 

 derns ; 2e [derniere] Edition par RaoUL Bricard ; with diagrams, 8vo. buckram, 2s Qd 1912 



15952 DUPUIS (Nathan F., Queen's Univ., Kingston, Canada) Elementary Synthetic Geometry 

 of the Point, Line and Circle in the Plane, icith diagrams, la)«,'e 12mo. buckram, 3s (p. 6*) 



New York, 1903 



15953 DUREGE (Heinrich; German Univ., Prague) Elemente der Theorie der FuNKTiONEN 

 einer complexen veranderlichen Grosse, mit besonderer Beriicksichtigun*:; der Schopfungen 

 RiEM ANN'S, 2. umgearheitete Auflage ; with 60 diagrams, 8vo. hf. bound, 2s Qd Leipzig, 1873 



15954 ViERTE Auflage ; with 68 diagrams, 8vo. red buckram, 5s 6d (p. M. 11) ibidem, 1893 



15955 FiJNFTE [NEUESTE] AuFLAGE, neu bearbeitet von LudwigMaurer ; with 41 diagrams^ 



8vo. buckram, 7s (p. M. 9 sewn) ib., 1906 



15956 Theorie der elliptischen Functionen : Versuch einer elementaren Darstellung ; 



2 Auflage ; unth 32 diagrams, 8vo. hf. black calf, 3s 6d ib., 1868 



15957 Vierte Auflage ; with 32 diagrams, 8vo. red buckram, 5s 6d (p. M. 10 sewn) ib., 1887 



15958 Funfte [neueste] Auflage, neu bearbeitet von Ludwig Maurer ; ^vith 36 diagrams, 



8vo. handsomely bound in hf. black morocco, cl. sides, t. e. g. {as good as new), 85 (p. M. 10 sewn) 



ib., 1908 



15959 DURELL (Clement Vavasour, Winchester Coll.) Course of Plane Geometry for Advanced 

 Students ; with 285 diagrams, 2 vols 8vo. in 1, Jif. black morocco neat, cl. sides, 9s (p. 12s 6d nett 

 in cl.) 1909-10 



15960 DZIOBEK (Otto ; Prof. Higher Mathematics, CJiarlottenburg) Lehrbuch der analytischen 

 Geometrie; u-ith 121 diagrams, 2 vols. 8vo. cl., Qs (p. M. 10) Braunschweig, 1900 



15961 EAGLES (Thomas Henry, Cooper's Hill) Constructive Geometry of Plane Curves, 

 with numerous Examples, with 186 diagrams, post 8vo. cl., or, buckram, Qs (p. 12s) 1885 



15902 EASTON (Burton Scott, Univ. Penna.) The Constructive Development of Group- 

 Theory, with a Bibliography, roy. 8vo. sewnf 3s Philadelphia, 1902 



15963 EBERHARD (Viktor ; Prof Mathematics, Halle) Zur MORPHOLOGIE der Polyeder ; with 

 2 folding plates and numerous diagrams, 8vo. red buckram, 6s (p. M. 8 sewn) Leipzig, 1891 



15964 EBNER (F.) Leitfaden der technisch wichtigen Kurven ; with 93 diagrams, 8vo. cL, 

 2s Qd (p. M. 4) Leipzig, 1906. 



159G5 ECKHARDT (Ernst) ZuRUCKFiJHRUNG der spharischen Trigonometrie auf die Geometrie 

 des ebenen Kreisvierecks : neue Grundlegung fiir die Formeln der spharischen Trigonometrie ; 

 with 35 diagrams, 8vo. buckram, t. e. g., 3s Qd (p. M. 4,40 sewn) Leipzig, 1909 



15966 EDWARDS (Joseph, Sidney Sussex Coll., Cantab.) Elementary Treatise on the Differ- 

 ential Calculus, with Applications and numerous Examples [3rd and latest Edition], with 130' 

 illustrations, 8vo. hf. black morocco neat, cl. sides, t. e. g. {as good as new), 9s (p. 14s in cl.) 1909 



15967 EGERER (Heinz) Ingenieur-Mathematik : Lehrbuch der hoheren Matheraatik fiir die 

 technischen Berufe, I. Band : Niedere Algebra und Analysis. Lineare Gebilde der Ebene und 

 des Raumes in analytischer und vektorieller Behandlung. Kegelschnitte ; with 320 illustrations, 

 large 8vo. cl., 8s (p. M. 12) Berlin, 1913 



15968 Repetitorium der hoheren Mathematik : LehrsJitze, Formeln, Tabellen ; ivith 



diagrams, large 8vo. buckram, 4s Qd (p. M. 6 sewn) Munchen, 1908 



15969 EISENHART (Luther Pfahler, Prof. Mathematics, Princeton Univ.) Treatise on the 

 Differential Gkometry of Curves and Surfaces, 8vo. hf. black morocco neat, cl. sides {fine 

 copy), 12s Qd (p. £1. in cl.) Boston [Mass., 1909] 



' I have introduced the idea of moving axes, and have derived the formulas pertaining thereto from the previously- 

 obtained Frenet-Serret forumlas.'— Pr?/a"ce. 



