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

 Mathematics, continued : — 



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

 matics, Freiberg : Lehrbuch der darstellenden Geometrie, 3. umgearbeitete Auflage (Bd. I 

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

 {fine copy), 145 (p. M. 27 sewn) Leipzig, 1901-6 



16535 ROUCHi:, (Eugene; de VImtitut), et Charles de COMBEROTJSSE : Trait6 de Geo- 

 metrie ; 6e Edition, augmentee ; ivith numerous diagrams, 2 vols. Svo. hf. maroon morocco neaty 

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



16536 SEPTiiiME Edition, revue et augmentee par Eugene Rouch6; with numerous 



diagrams, 2 thick vols. Svo. in 1 (pp. 1272), handsomely hound in hf. pigskin, cl. sides, uncuty 

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



16537 Another Copy, 2 vols., hf. morocco neat, 9s 



16538 , et Lucien LfiVY : Analyse Infinitesimals h. I'llsage des Ingenieurs ; with 95 



diagrams, 2 thick vols. roy. Svo. hf. black morocco neat, cl. sides, t. e. g. (as good as new), £1. Is 

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



16539 RTJCHONNET (diaries, de Lausanne) Exposition G6om6trique des ProprietEs 

 Generales des Gourdes, 6e [dernibre] r^dition, augmentee; ivith 7 folding plates {linen- 

 mounted), Svo. buckram, 2s &d Lausanne, 1901 



16540 RXJNGE (Carl David Tolme, Univ. Gottingen) Analytische Geometrie der Ebene ; 

 ^vith 75 diagrams, Svo. buckram, 4s (p. M. 6) Leipzig, 1908 



16541 Praxis der Gleichungen; unth folding plate, large cr. Svo. cl., 3s Qd (p. M. 5.20) 



ibidem, 1900 



16542 Theorie und Praxis der Reih en ; with 8 diagrams, large cr. Svo. cl., or, buckram, 4s 6d 



(p. M. 7) ib., 1904 



16543 RUSSELL (Hon. Bertrand Arthur William; late Fellow of Trinity, f.r.s.) Essay on the 

 Foundations of Geometry, 8vo. cl., uncut {o. p.), 7s 6d 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 live* 

 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. Svo. buckram, uncut, t. e. g., 5s 6d 

 (p. F. 9 nett sewn) 1901 



16545 The PRINCIPLES of Mathematics, Vol. I (all published), roy, Svo. cl., uncut {o. p.), 



12s 6d 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. Svo. cl., 4s (p. 10* 6fl?) 



Clarendon Press, Oxford, 1893 



16547 New and revised Edition, with folding plate and diagram; with the Sequel and 



Solutions, 3 vols. cr. Svo. cl., I4s (p. £1. 5* Qd nett) apud eandem, ibidem, 1905-8 



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

 Involution, Projection (including Homology), and Reciprocation.'— P?-e/ace. 



16548 SACHS (J.) Lehrbuch der projektivischen (neueren) Geometrie (synthetische neuere 

 Geometrie, Geometrie der Lage), nebst Sammlung von Aufgaben und deren Ergebnisse ; ivith 

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



Bremer haven [1900] -7 



16549 Another Copy, 3 vols. roy. Svo. in 2, buckram, 9s 



v. Kleyer, ante. 



16550 SALMON (George, jor. ; F.R.S., Provost T. C. D.) Lessons Introductory to the Modern 

 Higher Algebra, 4th [last] Edition [enlarged and rewritten] , Svo. 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 quantics wer© 

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

 Lessons Introductory to the Mcdern Higher Algebra, in which he incorporated much original msitter. '—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 Conrs d'algebre sxiperieure [q. v. post], in which the 

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



16551 Treatise on the Analytic Geometry of Three Dimensions, 4th Edition [enlarged 



and rewritten], thick Svo. hf. black morocco, cl. sides, t. e. g. {fine copy). Is Qd (p. 155 in cl.) 



ibidem, 1882 



16552 Fifth [latest] Edition, revised by Reginald A. P. Rogers, t.c.d., 2 vols. Svo. hf. 



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



' The sections on the general theory of surfaces are specially remarkable.'— ^6p. Bernard. 



16553 Treatise on Conic Sections, with Account of some of the most important Modern 



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



16554 Sixth [Final] Edition, with diagrams, Svo. buckram, t. e. g., Qs (p. 12*) 1879 



'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 svi\>iGQ,t.'—Abp. Bernard. 



