250 HENRY SOTHEKAN & CO., 140, STRAND, W.C, and 37, PICCADILLY, W. 



4911 TONGE (James) Coal [its Natural History and Uses], with 46 illustrations, 8vo. cL, As 

 (p. Qs nett) 1907 



TONSTALL (Cuthbert, ZQth Bp. of Durham) De Arte Supputandi— v. Tunstall, post. 



4912 TOPPING- (Michael) Account of the Measurement of a Base Line on the Sea Beach, 

 near Porto Novo, on the Coast of Coromandel, in May, 1788, 4to. (pp. 15), unbound, 2s 1788 



4913 TORELLI (Giuseppe) De Nihilo Geometrico Libii II ; with diagrams, 8vo. old hf. vellum 

 {rare), lOs 6d Veronce, 1758 



' Sein Hauptwerk, welches neulich aus der Vergessenheit durch O. Stolz hervorgerufen wurde. Nach Torelli ist die 

 Differentialrechnung nichts anderes als eine Rechnung rait Nullen. Man muss aber die metaphysische und die geomet- 

 risclie Null unterscUeiden.'— Pro/. Moritz Cantor. 



4914 TORRICELLI (Evangelista) Lezioni Accademiche (Delia Forza della Percossa; della 

 Leggerezza ; del Vento ; della Fama ; in Lode delle Mattematiche ; dell' Architettura Militare ; 

 Encomio del Secol d'Oro) ; with woodcuts, 4to. sewn, with Prof. Riccardi's booklabel (rare), £1. Is 



Firenze, 1715 

 This copy belonged to Prof. Riccardi, and contains old MS. notes, on which he remarks in his Biblioteca Matematica 

 Ilaliana: ' L'esemplare da rae posseduto porta alcune correzioni mss., e pare servisse alia starapa dalla secouda edizione 

 dil823'. 



4915 A Large Paper Copy, with beautiful etched portrait by Anichinio, and woodcuts, 4to. old 



Italian vellum (fine copy), £1. 8s 6c? 



With preface (pp. 45) by the editor, Tommaso Bonaventuri, giving an interesting account of Torricelli's experiments 

 and discoveries. 



The portrait is not mentioned in the collation of the work given by Riccardi, and appears to have been published only 

 with large paper copies. 



4916 Opera Geometrica : de Sph^eRA et Solidis Sphaeralibus ; de Motu Gravium naturaliter 



descendentiura ; de Motu Projectorum ; de Dimensione Parabolse ; de Solido Hyperbolico ; cum 

 Appendicibus de Cycloide, et Cochlea ; with engraving on copper, and numerous diagrams, 

 4to. sound and clean copy in old vellum, with Lord Eliock's bookplate (very rare), £L 15s 



ibidem, 1644 



The author's most important work, containing all his discoveries. 



' His great discovery was the interpretation of the previously known fact that water will rise in a suction pump only to 

 the height of about 32 feet — the idea that the column of fluid is sustained by the pressure of the atmosphere on the open 

 surface of fluid. The vacuum in the barometer is i\iQ Torrictllian vacuum ; and the barometer is sometimes called the 

 Torricellian tube. Torricelli also effected the quadrature of the cycloid— in this he was anticipated by Roberval— and 

 made other mathematical discoveries. To him is due the fundamental principles of Hydromechanics ; and he made and 

 greatly improved both telescopes and microscopes.' 



4917 TORTOLINI (Bamaba) Nuove Applicazioni del Calcolo Integrale relative alia Quad- 

 RATURA delle Superficie Curve, e Cubatura de Solidi ; colle Addizione, 2 parts 4to. in 1 

 (pp. 49), sewn, 3s Roma, 1844-6 



4918 [TOURNAOHON (Felix)] A Terre et en I'Air: Memoires du Geant, par Nadar, avec 

 Introduction par JACQUES Babinet, de I'lnstitut, post 8vo. (pp. 439), sewn (a few II. slightly 

 stained) ; scarce, 6s Qd 1864 



The ' Geant ' was the greatest balloon hitherto constructed, and was composed of 2 balloons, one within the other, 

 with a lifting power of 4^ tons, and had a square house fixed under it instead of the ordinary car. 



4919 TRABAUD (M., Maitre-ds-Arts) Le Mouvement de la LuMliiRE, ou premiers Principes 

 d'Optique ; with 6 folding plates, 8vo. old French marbled calf gilt, 3s Qd 1753 



4920 [ ] Principes sur le Mouvement et I'Equilibre, pour servir d'Introduction aux Mecan- 



iques et k la Physique ; with numerous plates, 4to. fine copy in contemporary calf gilt, with 

 bookplate of Philip 2nd Earl Stanhope, F.R.S., 6s 1741 



4921 TRAILL (Thomas W., m.i.c.e.) Boilers, Marine and Land : their Construction and Strength : 

 Rules, Formula^, Tables, etc. relative to Material, Scantlings, and Pressures, Safety Valves, 

 Springs, Fittings and Mountings, etc., 2nd Ed. [enlarged], woodcuts, sq. post 8vo. (pp. 547), hf. 

 morocco, 4s (p. l'2s 6d) 1890 



4922 Third Edition, with woodcuts, sq. post 8vo. cl., 4s 6d (p. 12s) 1896 



4923 TRAUTWINE (John C, c.e.) The Civil Engineer's Pocket-Book, 15th Ed., revised by 

 John C. Trautwine, Jr., cojjiously illustrated with woodcuts and diagrams, post 8vo. (pp. 866), 

 roa7i, g. e., with flap, Is Qd (p. £1. Is nett) New York, 1891 



4924 New Method of Calculating the Cubic Contents of Excavations and Embank- 

 ments, by the Aid of DIAGRAMS, 2nd Ed., revised, with \0 plates and 14 diagrams, large 8vo. cl. 

 {scarce), 6s ' Philadelphia, 1853 



4925 TRAUZL (Isidor) La Dynamite, Substance explosive invent^e par A. Nobel, Ingenieur 

 Suedois : Extrait d'une Brochure allemande par Paul Barbe, avec Notes du Traducteur ; with 

 2 folding plates, roy. 8vo. sewn (scarce), 6s 6^ 1870 



The first work gi^■ing an account of dynamite, invented by Alfred Nobel in 1S67. 



4926 TREADWELL (Frederick Pearson, Zurich Polytechnikum) Analytical Chemistry, trans, 

 from the 2nd German Ed. by William T. Hall ; Vol. II : Quantitative Analysis, with 96 

 illustrations, 8vo. cl., 10s 6d (p. 17s nett) New York, 1904 



4927 TREILLE (A.), et A. MEYER: Solution d'un Grand Probleme. La Navigation 

 Aerienne Realisable, par la Substitution au Ballon Sph^rique du Ballon en Couronne, 

 Systeme des Auteurs ; entibrement nouveau, facile, simple, rationnel, et exempt de dangers; 

 with folding plates, 8vo. (pp. 14), sewn (very scarce), £1. Is Noyon, 1852 



An extremely rare tract, quite unknown to Mr. Hatton Turnor, and other historians of ballooning. The new balloon 

 has a cylindrical shape, is fed with hot air, carries sails, and has rotating arms for propulsion. The authors say ' pour le 

 moment, semblable a la vapeur au temps de Newcomen, I'aerostation attend encore la sublime intervention d'un Waast ', 

 who seems to be James Watt. 



4928 TREVIGAR (L., Aulm Clarensis socius) Sectionum ConicarUM FI^AGMENTA, Methodo 

 facilliraa depiopstrata ; with numerous plates, 4to. old calf, 4s Cantabri^ice, 1731 



