HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 43, PICCADILLY, W. 829 



MATHEMATICS, continued : 



16534 ROHN (Karl; Prof. Mathematics, Dresden), und Erwin PAPPERITZ; Prof. Mathe- 

 matics, Freiberg: LEHRBUCH der DARSTELLENDEN GEOMETRIE, 3. umgearbeitete Auflage (Bd. I 

 2. Auflage) ; with 592 illustrations, 3vols. 8vo. in 1, handsomely bound in hf. pigskin, cl. sides 

 (fine copy], 14s (p. M. 27 sewn) Leipzig, 1901-6 



16535 ROUCHE, (Eugene ; de VImtitut), et Charles de COMBEROTJSSE : TRAITE de GEO- 

 METRIE ; 6e Edition, augmentee ; with numerous diagrams, 2 vols. 8vo. hf. maroon morocco neat, 

 cl. sides, 7s (p. F. 17 nett sewn) 1891 



16536 SEPTIEME EDITION, revue et augmentee par EUGENE ROUCHE ; with numerous 



diagrams, 2 thick vols. 8vo. in 1 (pp. 1272), handsomely bound in hf. pigskin, cl. sides, uncut, 

 t. e. g., 10* (p. F. 17 nett sewn) 1900 



16537 ANOTHER COPY, 2 vols., hf. morocco neat, 9s 



16538 , et Lucien LEVY : ANALYSE INFINITESIMALE a 1'Usage des INGENIEURS ; with 95 



diagrams, 2 thick vols. roy. 8vo. hf. black morocco neat, cl. sides, t. e. g. (as good as new], 1. Is 

 (p. F. 30 nett sewn) 1900-2 



16539 RTJCHONNET (Charles, de Lausanne] EXPOSITION GEOMETRIQUE des PROPRIETES 

 GENERALES des COURSES, 6 [derniere] edition, augmentee; ivith 1 folding plates (linen- 

 mounted), 8vo. buckram, 2s 6d Lausanne, 1901 



16540 RTJNGE (Carl David Tolme, Univ. Gottingen) ANALYTISCHE GEOMETRIE der EBENE ; 

 with 75 diagrams, 8vo. buckram, 4s (p. M. 6) Leipzig, 1908 



16541 PRAXIS der GLEICHUNGEN; with folding plate, large cr. 8vo. cl., 3s Qd (p. M. 5.20) 



ibidem, 1900 



16542 THEORIE und PRAXIS der REIH EN ; with 8 diagrams, large cr. 8vo. cl., or, buckram, 4s Qd 



(p. M. 7) ib. t 1904 



165 i3 RUSSELL (Hon. Bertrand Arthur Williani ; late Fellow of Trinity, F.R.S.) ESSAY on the 

 FOUNDATIONS of GEOMETRY, 8vo. cl., uncut (o. p.), 7s Qd Univ. Press, Cambridge, 1897 



This is by the person who has said that all the peoples allied or enemy giving up their lives in the War, while he lives 

 at ease in Cambridge, are like dogs who fight one another because they dislike each other's smell. 



16544 ESSAI sur les FONDEMENTS de la GEOMETRIE, Traduction par ALBERT CADENAT, revue 



et annotee par Louis COUTURAT ; with 11 diagrams, roy. 8vo. buckram, uncut, t. e. g., 5s Qd 

 (p. F. 9 nett sewn) 1901 



16545 The PRINCIPLES of MATHEMATICS, Vol. I (all published), roy. 8vo. cl., uncut (o. p.), 



12s Qd Univ. Press, Cambridge, 1903 



This important work was continued by WHITEHEAD and RUSSELL'S PRINCIPIA MATHEMATICA (q. v. post). 



16546 RUSSELL (John Wellesley, Balliol Coll.] ELEMENTARY TREATISE on PURE GEOMETRY, 

 with numerous Examples, numerous diagrams, cr. 8vo. cl., 4s (p. 10s Qd) 



Clarendon Press, Oxford, 1893 



16547 NEW AND REVISED EDITION, with folding plate and diagram; with the Sequel and 



Solutions, 3 vols. cr. 8vo. cl., 14s (p. 1. 5s Qd nett) apudeandem, ibidem, 1905-8 



1 Attempting to bring together all the well-known theorems and examples connected with Harmonics, Anharmonics, 

 Involution, Projection (including Homology), and Reciprocation.' Preface. 



16548 SACHS (J.) LEHRBUCH der PROJEKTIVISCHEN (NEUEREN) GEOMETRIE (synthetische neuere 

 Geometrie, Geometric der Lage), nehst Sammlung von Aufgaben und deren Ergebnisse ; with 

 numerous diagrams, 3 vols. sq. 8vo. in l,hf. black morocco neat, cl. sides, 10s Qd (p. M. 19 sewn) 



Bremerhaven [1900] -7 



16549 ANOTHER COPY, 3 vols. roy. 8vo. in 2, buckram, 9s 



v. KLEYER, ante. 



16550 SALMON (George, pr. ; F.R.S., Provost T. C. D.) LESSONS INTRODUCTORY to the MODERN 

 HIGHER ALGEBRA, 4th [last] Edition [enlarged and rewritten] , 8vo. cl. (FRESH COPY) ; VERY 

 SCARCE, 1. 10* Dublin, 1885 



' The investigations of Cayley and Sylvester [to whom the work is dedicated] into the invariants of qualities were 

 beginning to attract attention ; and Salmon proceeded to apply their results to geometrical theory, the result being 

 Lessons Introductory to the Modern Higher Algebra, in which he incorporated much original matter.' Abp. Bernard. 



' No account of contemporary writings on higher algebra would be complete without a reference to the admirable text- 

 books by G. Salmon, in his Higher Algebra, and by J. A. Serret, in his Cours d'algebre superieure [q. v. post], in which the 

 chief discoveries of their respective authors are embodied.' W. W. R. Ball. 



16551 TREATISE on the ANALYTIC GEOMETRY of THREE DIMENSIONS, 4th Edition [enlarged 



and rewritten], thick 8vo. hf. black morocco, cl. sides, t. e. g. (fine copy], 7s Qd (p. 15s in cl.) 



ibidem, 1882 



16552 FIFTH [LATEST] EDITION, revised by REGINALD A. P. ROGERS, T.C.D., 2 vols. 8vo. hf. 



blaek morocco neat, cl. sides (as good as new), 12s (p. 16s Qd in cl.) 1912-15 



' The sections on the general theory of surfaces are specially remarkable.' A bp. Bernard. 



16553 TREATISE on CONIC SECTIONS, with Account of some of the most important Modern 



Algebraic and Geometric Methods, 5th Edition, with diagrams, 8vo. cl., 4s (p. 12s) 1869 



16554 SIXTH [FINAL] EDITION, with diagrams, 8vo. buckram, t. e. g., 6s (p. 12s) 1S79 



'Admirably arranged, and constructed with an unerring sense of the distinction between important principles and 

 mere details, it exhibited more fully than any other book of the time at once the power of the Cartesian co-ordinates and 

 the beauty of geometrical method ; and for half a century it was the leading text-book on its subject.' Abp. Bernard. 



