HENRY SOTHERAN & CO., 140, STRAND, W.C, and 43, PICCADILLY, W. 715 



14272 RITCHIE (William, f.r.s. ; Prof. Nat. Philosophy, Univ. London) On the Elasticity of 

 Threads of Glass, with some of the most useful Applications of this Property to Torsion 

 Balances, with 2 woodcuts, 4to. (pp. 8), sewn, Is 6d 1830 



14273 Experimental Researches in Voltaic Electricity and Electro-Magnetism, 



with plate, roy. 4to. (pp. 20), sewn, with inscr. to William Scoresby, D.D., F.E S,, 3s 6d 1832 



U274 RITSERT (Eduard, Darmstadt) Tntersuchungen iiber das Ranzigwerden der Fette. 

 Inan^'ural Dissertation, roy. 8vo. (pp. 48), sewn, 2s Berlin [1890] 



Including an historical introduction (pp. 11), 



14275 RITT (Georges) Problemfis d' Application de I'Algebre a la Geometrie, avec les Solu- 

 tions developpees ; loith 11 folding plates, 2 vols. 8vo. in 1, hf. calf, 2s 6d 1836-7 



14276 RITTER (August, Aachen) Elementary Theory and Calculation of Iron Bridges and 

 Roofs, translated from the third German Edition by H. R. Sankey, with 502 diagra.ns, 8vo. cl. 

 (o. p.), 6s (p. \5s) 1879 



' Advocating the use of the ' Method of Moments ' in calculating the stresses in bridges and rooia.'— Translator's Preface. 



14277 RITTER (Franz) Speculum Solis, das ist : Sonnen-Spiegel, oder kunststiindiger, leichter 

 und gruntlrichtiger Bericht von den Sonnenuhren, und was denselbigen angeluiret ; nunmehr 

 mit dem dritten Theil, allerhand neuer Erfindungen vermehret durch einen Liebhaber dess 

 Studii Mathematici ; with engraved title, and numerous woodcuts, sm. 4to. hf. crimson Levant 

 morocco extra [stamp on title, and 2 II. slightly water-stained, otherwise A FINE COPY), £1. 10* 



Niirnherg, 1652 

 Best e«lltion of the work, which was unknown toPoggendorfTand Graesso. It first contains 3 i)arts, and was republished 

 in 16tX). The original edition, comprising the tirst 2 jwirts only, appeared in ItJOO-ll. Tin- last part contains some curious 

 conceits on sun-dials, including one sounding all hours by either exploding a charge of gunpowder by means of a burning- 

 glass, or by sound caused by steam generated by the same means ; also how to make a sun-dial out of a sun-Howcr, etc. etc. 



14278 RITTER ( Johann Wilhelm) Die Physik als Kunst : ein Versuch, die Tendenz der Physik 

 aus iiirer Geschichte zu deuten, 8vo. sewn, 2s ^d Miinchen, 1806 



'I'Jie author was the discoverer of the ultra-violet spectrum, and the first to promote the chemical theory of galvanism. 



14279 RITTER (Wilhelm, Zurich) Die elastische Linie und ihre Anwendung auf den continuir- 

 lichen Balken, 2. giinzlich umgearbeitete AuHage ; with folding plate, and 12 woodcuts'. Der 

 elastiche Bogen, berechnet mit Hiilfe der graphischen Statik ; with 2 plates and 20 diagrams 

 —2 vols. roy. 8vo. in 1, hf. calf, 2s 6d Zilrich, 1883-6 



14280 Die Statik der Tunnelgewolbe ; with 2 folding plates, and 17 diagrams, roy. 8vo. 



(pp. 66). sewn, 2s ' " Berlin, 1879 



14281 RIVA [hie a RIPA] (Ludovicus, astronomiw ac meteorologice in Gymnasio Patavino pro- 

 fessor) Miscellanea [viz. : de Meteoro Ignito, etc. : de Vi Vaporum in Hygrometris Dissertatio 

 Geometrico-Mechanica : Demonstrationes Theorematum ad Quadraturas spectantium, etc. etc.]; 

 with plate and vignettes on copper, 4to. sevm, with auto. ' F [rancis] Maseres [F.R.S.] . Feb : 2, 

 1759 ' on title, Is 6rf Venetiis, 1725 



Rare, and unknown to Poggendorff, Brunet, or Graesse, 



14282 RIVARD (Dominique Fran9ois, Univ. Paris) Abrege des i'.lkmens de Mathematiques, 

 6*-" Edition, revue et anginentee par I'Auteur ; with 6 folding plates, 8vo. old calf qilt, 3s 1765 



14283 Traite de Gnomonique, ou de I'Art de faire des'Cadrans, premiere Edition ; ivith 4 



folding plates, 8vo. old calf gilt, 10s 6d 1741 



A work still valued) which superseded Ozanam's. It was recommended by Montucla. 



14284 Traite de la Sphere et du Calendrier, 6^ Edition, augrnent^e par Jerome de 



LalaNDE [f.r.s.] ; with 3 folding plates, 8vo. old tree-calf gilt, 5s 1804 



14285 ROADS and RAILROADS, Vehicles, and Modes of Travelling, of Ancient and Modern 

 Countries : with Accounts of Bridges, Tunnels, and Canals, in various Parts of the World, ivith 

 plates and numerous smaller woodcuts by J. W. Whymper, R.L, etc., post 8vo. cl., uncut {scarce), 

 15s J. W. Parker, 1839 



Pp. 2<)2-340 deal with railways, and contain interesting railway views and scenes. A si^ecial chapter is devoted to the 

 Liverpool and Manchester Railway. 



1 4286 ROBERT (Henri, horloger de la Marine de V Etat) Usage du Tableau des Longueurs du 

 Pendulk, (lonnant les Quaiitites dont il faut I'allonger ou le raccourcir pour r^gler le Mouvement 

 auquel il est appliqu6; with folding table, 8vo. (pp. 4i, sewn. Is Qd «• c^« 



14287 ROBERT (Louis, ingenieur-cenologue, Reims) Les ViNS MOUSSEUX : Manuel pratique donnant 

 des Methodes rationelles, suivi d'une Etude sur la Degustation des ViNS ; with 53 woodcuts, 

 cr. 8vo. cl., 2s 6d 1897 



142S8 ROBERTS (Charles, f.r.c.s.) The Naturalists' Diary: a Day-Book of Meteorology, 

 Phenology, and Rural Biology, ivith coloured folding map, cr. 8v(). cl., 2s 6rf [1886] 



14289 ROBERTS (Michael, Erasmus Smith's Prof. Math., t.c.d.) Tract on the Addition of 

 Elliptic and Hyper-Elliptic Integrals, 8vo. cl. (scarce), 3s 6d Dublin, 1871 



• In it is constructed a trigonometry of hyperelliptic functions analogous to that of elliptic functions. Roberts was 

 the discoverer of many striking and beautiful properties of geodesic lines of curvature on the ellipsoid, and in particular 

 concerning their relations to umbilics.'— D, .V. /;. 



14290 ROBERTS (Ralph Augustus, t.c.d. ) Collection of Examples on the Analytic Geometry 

 of Plane Conics, with some Examples on Sphero-Conics, cr. 8vo. cl., with Prof. H. W. Lloyd 

 Tanner's bookplate, 2s 6d (p. 5s) Dublin, 1884 



'I believe that either the examples themselves, or the methods of their solution, are to a great extent original.'— 



Prejace. 



14291 Treatise on the Integral Calculus, Part I (all pub.): Elementary Account of 



Elliptic Integrals, and Applications to Plane Curves, m;iYA 34 diagrams, i^&tSvo. cl. {o.p.), 

 with bookplate of Pro f Lloyd Tanner, F.R.S., 5s 6rf (p. 10* 6rf) ibidem, 1887 



