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

 MATHEMATICS, continued . 



15944 DOSTOR (Georges, de VInstitut Catholique) ELEMENTS de la THEORIE des DETERMINANTS, 

 avec Application i 1'Algebre, la Trigonometric et la Geometric analytique, dans le Plan et dans 

 1'Espace, 2 e [derniere] Edition, 8vo. hf. black morocco neat, cl. sides, t. e. g. (nice copy), 6s (p. F. 8 

 nett sewn) f 1883 or 1905 



15945 THEORIE GENERALE des POLYGONES TOILES ; with diagrams, 4to. buckram (o. p.), 



4s 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. 9s Qd) 1898-68 



15947 DROBISCH (Moritz Wilhelm ; Prof. Philosophy and Mathematics, Leipzig) ERSTE GRUND- 

 LEHREN der MATHEMATISCHEN PsYCHOLOGlE ; with folding plate, 8vo. cl., 3s Qd Leipzig, 1850 



15948 DRONKE (Adolf) EiNLEiTUNG in die HOHERE ALGEBRA, 8vo. buckram, 2s Qd (p. M. 5. sewn) 



Halle, 1872 



15949 Die KEGELSCHNITTE in SYNTHETISCHER BEHANDLUNGSWEISE ; with diagrams, 8vo. 



buckram, Is Qd Leipzig, 1881 

 v. BALTZER, ante. 



15950 DTJHAMEL (Jean Marie Constant, de VInstitut) ELEMENTS de CALCUL INFINITESIMAL, 

 2e Edition ; with 6 folding plates, 2 vols. 8vo. in 1, hf. roan (some pp. ofv. II damaged), 3.9 1860-1 



15951 DUPORCQ, (Ernest, ingenieur des telegraphes) PREMIERS PRINCIPES de GEOMETRIE Mo- 

 DERNE ; 2e [derniere] Edition par RAOTJL 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, with diagrams, large 12mo. buckram, 3s (p. 6s) 



New York, 1903 



15953 DUREGE (Heinrich; German Univ., Prague) ELEMENTE der THEORIE der FUNKTIONEN 

 einer COMPLEXEN VERANDERLICHEN GROSSE, mit besonderer Beriicksichtigung der Schopf ungen 

 RIEMANN'S, 2. umgearbeitete Auflage ; with 60 diagrams, 8vo. hf. bound, 2s Qd Leipzig, 1873 



15954 VlERTE AUFLAGE ; with 68 diagrams, 8vo. red buckram, 5s 60? (p. M. 11) ibidem, 1893 



15955 FUNFTE [NEUESTE] AUFLAGE, neu bearbeitet von LUDWIGMAURER ; withal diagrams, 



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



15956 THEORIE der ELLIPTISCHEN FUNCTIONEN : Versuch einer elementaren Darstellung ; 



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



15957 VIERTE AUFLAGE ; with 32 diagrams, 8vo. red buckram, 5s Qd (p. M. 10 sewn) ib., 1887 



15958 FUNFTE [NEUESTE] AUFLAGE, neu bearbeitet von LUDWIG MAURER ; with 36 diagrams, 



8vo. handsomely bound in hf. black morocco, cl. sides, t. e. g. (as good as new), 8s (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, hf. black morocco neat, cl. sides, 9s (p. 12s Qd nett 

 in cl.) 1909-10 



15960 DZIOBEK (Otto ; Prof. Higher Mathematics, Charlottenburg)LEHRBUCH der ANALYTISCHEN 

 GEOMETRIE; with 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, 6s (p. 12s) 1885 



15962 EASTON (Burton Scott, Univ. Penna.) The CONSTRUCTIVE DEVELOPMENT of GROUP- 

 THEORY, with a Bibliography, roy. 8vo. sewn, 3s Philadelphia, 1902 



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

 2 folding plates and numerous diagrams, 8vo. red buckram, Qs (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 



15965 ECKHARDT (Ernst) ZURUCKFUHRUNG der SPHARISCHEN TRIGONOMETRIE auf die GEOMETRIE 

 des EBENEN KREISVIERECKS : neue Grundlegung fur die Formeln der spharischen Trigonometric ;. 

 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 Mathematik fur 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 : Lehrsatze, Formeln, Tabellen ; with 



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 formulas.' Preface. 



