818 HENRY SOTHEKAN & CO., 140, STRAND, W.C, and 43, PICCADILLY, W. 



Mathematics, continued :— 



16286 LE COINTE (Ignace Louis Alfred, s.j.) Lecons siir la Theorie des Fonctions Circu- 

 LAIRES et la Trigonometrie ; with diagrams, 8vo. hf. maroon morocco neat {as good as new), 

 3s 6c? 1858 



16287 LEF^BURE de FOXTRCY (Louis Etienne) Lecons (I'Algkbre, 10^ [dernieie] Edition, 

 8vo. hf. black morocco neat, cl. sides, t. e. g. {as good as new), 5s (p. F. 7.50 nett sewn) 1893 



16288 Traite de Geometrie Descriptive, avec Introduction renfermant la Theorie du Plan 



et de la Ligne Droite consideiee dans I'Espace, 8^ [derniere] Edition ; with 34: folding plates {all 

 neatly linen-mounted), 8vo. handsomely bound in hf blaik morocco, cl. sides, uticut, t. e. g. 

 {nice copy) ; o. p.,Ss ^d 1881 



16289 LEGENDRE (Adrien Marie; f.r.s.), Elements de Geometrie, avec Additions et Modifi- 

 cations par A. Blanchet, 39^ [derniere] Edition ; with numerous diagrams, 8vo. buckram, 3s s. d. 



16290 Theorie des NoMBRES, 3^ [la meilleure] edition [avec Appendice: Methodes 



nouvelles pour la Resolution Approchee des Equations Numeriques, etc. etc.] ; with folding plate, 

 2 vols. 4to. hf. calf gilt (nice copy) ; very rare, £2. 15^ Didot, 1830 



The best edition, now excessively scarce, ' The third edition, issue:! in 1830, includes the results of his various 

 later papers, and still remains a standard work on the subject. It may be said that he here carried the subject as far 

 as was possible by the application of ordinary algebra. . . . The law of quadratic reciprocity, which connects any two odd 

 primes, was first proved in this book. Gauss called the proposition ' the gem of arithmetic' . . . The work also contains 

 the useful theorem by which, when it is possible, an indeterminate equation of the •2nd degree can be reduced to the form 

 aoi^+'b\f+cz^ = 0:—W. W. B. Ball. 



16291 AA-HLENTHEORIE, nach der 3. Auflage ins Deutsche iibertragen von H. Maser, 2. 



w^ohlfeile Ausgabe, 2 vols. roy. 8vo. in 1, buckram, 9s (p. M. 12 sewn) Leipzig, 1893 



16292 LEJEUNE-DIRICHLET (Peter Gustav ; Univ, Gottingen) Vorlesungen iiber Zahlen- 

 THEORIE, herausgegeben v. R. Dedekind, 2. umgearbeitete Auflage, 8v. hf. cl.. 3s 6d 



Braunschweig, 1871 



16293 Vierte [neueste] umgearbeitete und vermehrte Auflage, 8vo. hf. red morocco 



neat, cl. sides {nice copy) ; o. p., 16* ibidem, 1894 



' Of his original researches the most celebrated are that on the establishment of Fourier's Theorem, and that in the theory 

 of numbers on asymptotic laws, i.e. laws which approximate more closely to accuracy as the numbers concerned become 

 larger.'— jr. W. R. ball. 



16294 LEROY (Charles FranQois Antoine, de Vtlcole Poly technique) Traite de Geometrie De- 

 scriptive, suivi de la Methode des Plans cot6s et de la Theorie des Engrenages cylindriques et 

 coniques ; 13*^ l^dition, revue et annotee par E. Martelet; with Atlas, containing IV plates, 2 vols. 

 4to. hf. maroon morocco neat, cl. sides, uncut, t. e. g. {as good asneic), \OsQd (p. F. 16 nett sewn) 1888 



16295 Traite de Stereotomie, comprenant les Applications de la Geometrie descriptive ;\ la 



Theorie des Oinbres, la Perspective lineaire, la Gnomonique, la Coupe des Pierres et la Charpente ; 

 12° Edition, revue et annotee par E. Martelet, avec Supplement : Theorie et Construction de 

 I'Appareil li^licoidal des Arches biaises, par Jules de la Gournerie, redigees par Ernest 

 Lebon, 4to., with Atlas, containing 76 plates, folio — 2 vols., hf. maroon morocco neat, cl. sides, 

 uncut, t. e. g. {fine copy), 18s (p. F. 26 nett sewn) 1890 



16296 LIE (Marius Sophus ; Prof Geometry, Leipzig) Geometrie der Beruhrungstransforma- 

 tionen, dargestellt von Sophus Lie und Georg Scheffers, I. [einziger] Band ; with diagratns, 

 8vo. handsomely bound in hf. black morocco, cl. sides {as good as new), 18s (p. M. 24 sewn) 



Leipzig, 1896 



16297 Vorlesungen iiber continuierliche Gruppen, mit geometrischen und anderen 



Anwendungen, bearbeitet und herausgegeben von Georg Scheffers ; with diagrams, large 8vo. 

 liandsomely bound in hf. pigskin, cl. sides {fine copy), 18s (p. M. 24 sewn) ibidem, 1893 



16298 , und Friedrich ENGEL; Prof. Mathematics, Greifswald: Theorie der Trans- 



formationsgruppen, 3 vols, large 8vo. handsomely bound in hf. red morocco, cl. sides {fine copy), 

 £2. 55 (p. M. 60 sewn) ' ib., 1888-93 



' The finite continuous groups were first made the subject of general research by Sophus Lie, and applied by him to 

 the integration of ordinary linear partial differential equations.'— P?-o/. Cajori. 



16299 LIEBER (H.), und F. v. LXjHMANN : Trigonometrische Aufgaben, 3. [letzte] 

 Auflage; with folding plate, 8vo. red buckram, 3s (p. M. 4 sewn) Berlin, 1889 



16300 LIEBLEIN (Johann) Sammlung von Aufgaben aus der algebraischen Analysis zum 

 Selbstunterricht ; 2. [letzte] vermehrte Auflage, herausgegeben von W. Laska, 8vo. buckram, 3s 

 (p. M. 4.50 sewn) Prag, 1889 



16301 LIEBMANN (Heinrich, Univ. Leipzig) Nichteuklidische Geometrie ; loith 22 diagrams, 

 large cr. 8vo. cl., or, buckram^ As (p. M. 6.50) Leipzig, 190 5 



16302 LIQOWSKI (W.) Tasciienbuch der Mathematik : Tafeln und Formeln, 3. [neueste] 

 vermehrte Auflage ; with woodcuts, post 8vo. buckram, 2s 6d (p. M. 3 50) Berlin, 1893 



Last edition of this excellent manual of mathematical formulae. 



16303 LILIENTHAL (Franz Reinhold v. ; Prof Mathematics, Milnster) Grundlagen einer 

 Krummungslehre der Curvenscharen, roy. 8vo. buckram, As (p. M. 5 sewn) Leipzig, 1896 



16304 Vorlesungen iiber Differentialgeo.metrie, Band I und II. 1 [soweit bisher 



erschienen]; with diagrams, 2 vo\&.8\o. in 1, handsomely bound in hf. black morocco, cl. sides, 

 t. e. g., 17s (p. M. 23 sewn) ibidem, 1908-13 



