232 HENRY SOTHERAN & CO., 140, STRAND, W.C, AND 37, PICCADILLY, W. 



4576 STEPHENSON (George), Railway Engineer, The Life of, by Samuel Smiles, ll.d., Library 

 Edition, with steel portrait by W. HoU, thick 8vo. cL, 5.9 (p. 16s) 1857, or '58 



Including a resume of the Railway System and its Results, by Robert Stephenson. ' The standard authority.'— D. N. B. 



4577 STEPHENSON (Robert, m.p., f.r.s., son of George Stephe7ison) Report on the Atmospheric 

 Railway System, with 27 plates and folding table of pressure diagrams, 4to. (pp. 44), sewn 

 (scarce), £I. \s 1844 



The report was undertaken for the Chester and Holyhead Railway Co. (then promoting their bill in Parliament), and 

 saved them from the disaster of adopting,' the atmospheric system. 



' He appears to have been the first independent investigator of the atmospheric system, in its application on a 

 practical scale.'— IF. Pole. 



4578 : Jeaffreson (John Cordy) The Life of Robert Stephenson, f.r.s., with Chapters on 



some of his most important PROFESSIONAL Works by William Pole, f.r.s., with 2 fine portraits 

 and Opiates by Adlard, besides woodcuts, 2 vols. 8vo. cL, 10s (p. £L 12*) 1864 



Including a full and very fair account by Mr. Pole of the Atmospheric delusion. 



4579 STEVENSON (Alan, f.r.s.e.) Account of the Skerryvore Lighthouse, with Notes on the 

 Illumination of Lighthouses, with 33 steel plates, 117 woodcuts and diagrams, and folding 

 map, impL 8vo. cl., with author's inscr., \as (p. £3. 3*) Edin., 1848 



4580 Another Copy, cl. {back damaged), with anthor's inscr. '■from an old schoolfellow,' 12s 



The third of the great triplet of early lighthouses which fascinated our youthful imagination— the Eddystone, the Bell 



Rock, and the Skerryvore, and in the wildest situation of them all. 



' It still remains a standard book ... He designed and carried out ten lighthouses, including Skerryvore lighthouse 

 tower, the finest example for mass, combined with elegance of outline, of any extant rock tower.'- D. N. B. 



4581 STEVINTJS (Hendrik ; son of Simon Stevinus)V\' i^co^STicn filosofisch Bedryf, hegrepen 

 in veertien Boeken ; with woodcuts, thick cr. 4to. ; Avith Atlas : Plaetboec vervangende de 

 FiGUREN of FoRMEN gehorig tottet Wiscontich [_sic'\ Filosofisch Bedryf ; with 2^ fine folding 

 plates on copper, folio — 2 vols, old white vellum {fine copy) ; rare, £1. los Leyden, 1667—2;. p., 1668 



4582 Atlas only : Plaetboec vervangende de Figuren of Formen' gehorig tottet Wis- 

 contich [sic] Filosofisch Bedryf; with 2^ fine folding -plates on copper, folio, oldvellum, llsM 



z. p., 1668 

 Chiefly dealing with hydraulic problems and engineering. The work is rare, and was unknown to PoggendorflT, Brunet, 

 Graesse, etc. 



4583 STEVINTJS (Simon, de Bruges) (Euvres Mathematiques, oii sent inser^es les M6moires 

 Mathematiques ; le tout reveu, corrig^, et augmente par Albert Girard ; with numerous 

 woodcuts and diagrams, folio, old calf [side margins water-stained, and some II. wormed) ; rare, 

 £1. 15s Leyde, B. et A. Elsevier, 1684 



The most complete edition of the author's works, containing : Arithm^tique ; Algebre de Diophante d'Alexandrie ; 

 Pratique d'Arithm^tique ; Cosmographie ; Pratique de Geometric ; Art Ponderaire ou Statique ; Optique ; Castrametation ; 

 Fortification par ficluses ; Fortification. 



4584 Hypomnemata Mathematica, e Belgico in Latinum K Wil[lebrordo] Sn[ellio1 



conversa ; with woodcuts, and numerous diagrams, thick folio, old white vellum {some margins 

 worn) ; RARE, £1. 10* ib., J. Patius, 1608 



The first collected edition of the author's works. 



'He introduced in his Arithmetic exponents to mark the power to which quantities were raised ... He further sug- 

 gested the use of fractional (but not negative") exponents, and a decimal system of weights and measures. His geometry 

 is ingenious . . . Some theorems on per.spective are enumerated.' — W. W. It. Ball. His his work (m book-keeping is 

 also of great importance. 



4585 De Beghinselen der Weeghconst : De W^eghdaet : De Beghinselen des Water- 



WICHTS ; all first editions, with numerous diagrams (all in fine CONTEMPORARY COLOURING), 

 3 vols. sm. 4to. in 1 , sound copies in boards (excessively rare), £8. 85 



ib., Christofell Plantijn, 1586 



'It is however on his Slatics and Hydrostatics published (in Flemish) at Leyden in 158(5 that his fame will rest. In 

 these works he enunciates the triangle of forces— a theorem which some think was first propounded by Leonardo da Vinci. 

 Stevinus regards this as the fundamental proposition on the subject ; previous to the publication of his work the science 

 of statics had rested on the theory of the lever, but subsequently it became usual to commence by proving the possibility 

 of representing by straight lines, and so of reducing many theorems to geometrical propositions, and in particular to 

 obtaining in that way a proof of the par.illelogiam (which is equivalent to the triangle of forces). . . . Stevinus also found 

 the force which must be exerted along the line of greatest slo])e to support a given weight on an inclined plane— a problem 

 the solution of which had b^en long in disjmte. He further distinguishes between stable and unstable equilibrium. In 

 hydrostatics he discusses the question of the pressure which a fluid can exercise, and explains the so-called hydrostatic 

 paradox.'— IT. W. li. Ball. 



4586 NiEUWE Maniere van Sterctebov door Spilsluysen ; first edition, with fine vignette, 



and numerous other woodcuts, folio, sewn (fine copy) ; VERY rare, £1. 5s Rotterdam, 1617 



In this work the author first propounds h^s theory of fortification based on a system of locks and canals, which still 

 forms the principle of the fortification of Holland. 



' Sa fortification par ecluses est encore aujourd'hui un onvrage digne de lemarque.' — v. d. JVeyer. 

 ' Hij gaf voor het eerst eene volledige bcschrijving der schutkolk-of kamersluizen.' — Van Brugge. 



4587 Nouvelle Maniere de Fortification par Escluses ; ivith vignette on title, and 



numerous large woodcuts (pp. 65) : La Castrametation, descrite selon Tordonnance et vsage 

 du . . . Prince Maurice, Prince d'Orange, etc., 2^ Ed., reueue «& corrigee; with fine engraved 

 portrait of Maurice, Prince of Orange, and plate of his arms, besides vignette and ivoodcuts 

 (pp. 58)— 2 vols, folio in l,fine and large copies in boards (very rare), £2. 2.9 



Leyden, M. et B. Ehevier, 1618 

 Tlie first work is a translation of 'Nieuwe maniere van Sterktcbou.' 

 4588 Vande Spiegeling der SiNGCONST; et Vande MolenS: deux Traites in^dits. Re- 

 impression [avec Preface] par D. Bierens de Haan, cr. Aio. parchment cover {out of print), 

 5s Amsterdam, 1884 



4589 : GOETHALS (Felix Victor, bibliothecaire de la Ville de Bruxelles) Notice Historique 



sur la Vie et les Travaux de Simon Stevin, de Bruges, suivie de Remarques sur le Dodoens 

 de M. VAN Meerbeeck ; with etched portrait, 8vo. sewn {scarce). Is Qd Bruxelles, 1842 



One of the best biographies of Stevin. 



