HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 37, PICCADILLY, W. 171 

 3410 OTTLEY (W. C., Cains Coll., Cantab.} TREATISE on the DIFFERENTIAL CALCULUS, with 



Collection of Examples: on DIFFERENTIAL EQUATIONS, with Examples: Hamilton (Henry 



Parr, F.R.S., Dean, of Sarum) ANALYTICAL SYSTEM of CONIC SECTIONS, 3rd Ed. 3 vols. 8vo. in 1, 

 with diagrams ; hf. morocco gilt, t. e. g., 8s Cambridge, 1837-2-4 



3411 TREATISE on DIFFERENTIAL EQUATIONS, with Collection of Examples, 8vo. boards, 



2s Qd ib., 1832 



3412 ANOTHER COPY, with auto. ' J. W. COLENSO, St. John's Coll. Cambridge' \Ep. of Natal}, 



3s Qd 



3413 _ _ TREATISE on the INTEGRAL CALCULUS, with a Collection of Examples, 8vo. boards, 

 35 Qd ib., 1838 



3414 OUDEMANS (Jan Abraham Christiaan) BESCHRIJVING en AFBEELDING van een UNI- 

 VERSAAL-INSTRUMENT van KEPSOLD ; with 2 folding plates, roy. 4to. sewn, 4s Leiden, 1852 



The ' universal instrument ' was made for astronomical purposes during an astronomical expedition to the Dutch East 

 Indies. 



3415 OVENDEN ( ) : DESCRIPTION of a MACHINE to TRAVEL WITHOUT HORSES : Invented by 

 Mr. Ovenden, at Mr. Jacob's and Viny's, Blackfriars Rd., London, 1 p. of Text, and copperplate, 

 8vo. sewn (very rare), 10s Qd [1774] 



This is probably the earliest foot-driven carriage invented, and as such the forerunner of the bicycle, although both 

 inventor and invention have fallen into utter oblivion. 



The machine is stated to be ' capable of travelling, with ease, six miles in an hour ; and, by a particular exertion of the 

 footman, might travel nine or ten miles an hour ou a good road, and even would go up a considerable hill.' The master 

 sat in front, while the ' footman ' did the work. 



3416 OVERMAN (Frederick, Mining Engineer] The MANUFACTURE of IRON, in all its various 

 Branches, with ESSAY on the MANUFACTURE of STEEL, 3rd Ed., revised, with 150 woodcuts, 

 roy. 8vo. cl., 5s Qd Philadelphia, 1854 



3417 PRACTICAL MINERALOGY, ASSAYING, and MINING, etc., 2nd Ed., fcap. 8vo. hf. calf 



gilt, 2s ibidem, 1854 



3418 OVIDIO (Enrico d') Le PROPRIETA FONDAMENTALI delle CURVE di SECOND' ORDINE, studiate 

 sulla Equazione generale di secondo Grado in Coordinate Cartesiane ; ivith diagrams, 8vo. seivn, 2s 



Torino, 1876 



3419 OXLEY (Thomas, C.E.) The CELESTIAL PLANISPHERES, or ASTRONOMICAL CHARTS, with a 

 complete System of calculating Nativities by the Celestial Planispheres, new and improved Formulae 

 for Astronomical Calculations, choice Astrological Aphorisms, etc. etc. etc. ; with the Supple- 

 ment 2 vols. 8vo. in 1, cl. (wanting plates), Qs 1830 



3420 The GEM of ASTRAL SCIENCES, or Mathematics of Celestial Philosophy ; with Improved 



Formulae, new and expeditious Tables of Right Ascensions and Declinations of the Planets, etc. etc., 

 4 copperplates, 8vo. cl., 8s Qd [1848] 



In his preface the author claims to be the inventor of ' my Patent American hand Clearing Machines, and hand Clearing 

 Engines for cutting down standing Timber level with the ground, which have been used in the Western World for over a 

 quarter of a century', and of 'my lately patented Self- reefing and unreefing Paddle "Wheels, the Submarine Feathering 

 Propeller Wheels, and my Expanding and Contracting Propellers, etc.' He also claims to have invented and constructed 

 'the working model of a steam boat, some 10 years before one was seen on the River Thames'. The modest inventor 

 is however not mentioned in D. N. B. 



3421 OXYGEN : BESCHREIBUNG einiger zum Gebrauch der DEPHLOGISTISIRTEN LUFT bey dem 

 BLASEROHR und SCHMELZFEUER eingerichteten MASCHINEN, saint einer ANWEISUNG sich die 

 DEPHLOGISTISIRTE LUFT in MfiNGE zu VERSCHAFFEN ; with 2 folding plates on copper, 12mo. 

 boards (rare), 12s Qd Tubingen, 1785 



The first part consists of a description of the oxyhydrogen blowpipe, and the second of a machine to produce oxygen in 

 large quantities, devised by the anonymous author himself. 



3422 OZANAM (Jacques) DICTIONNAIRE MATHEMATIQUE, dans lequel Ton trouve, outre les Termes 

 de cette science, plusieurs Termes des Arts et des autres sciences ; avec des raisonnemens qui con- 

 duisent peu a peu 1'esprit a une connaissance universelle des Mathematiques ; with numerous 

 copperplates and woodcuts, 4to. old calf gilt, 8s Qd 1691 



3423 [ ] METHODS de LEVER les PLANS et les CARTES de TERRE et de MER ; with copperplates 

 of Surveying Instruments, etc., and diagrams, 16mo. fine copy in old calf gilt, with bookplate of 

 Philip 2nd Earl Stanhope, F.R.S., 5s 1700 



3424 RECREATIONS MATHEMATICAL and PHYSICAL ; laying down and solving many Profitable 



and Delightful Problems, done into English, with 27 copperplates, and numerous woodcuts, sm. 8vo. 

 old hf. russia, Qs 1708 



3425 NEW EDITION, lately recomposed, and greatly enlarged by J. E. MONTUCLA; and now 

 trans., with many Additions and Observations, by CHARLES HUTTON, F.E.S., with 98 folding 

 plates, 4 thick vols. 8vo. old calf gilt (broken), l2sQd 1803 



' I believe that it would be difficult to find in any of the books cuncnt in England on mathematical amusements as 

 many as a dozen puzzles which are not contained in oi.e of the?e four volumes'. IF. W. R. Bad. The above edition has 

 also been used, and is frequently referred to, in Mr. Ball's Mathematical Recreations and Problems. 



' Cet ouvrage curieux contient la solution d'une foule de problemes. On y trouve encore un traite de Jiorloges elementaires, 

 une dissertation sur les lampes perpetuclles, enfin un ample recueil de tours de gobelets et d'escamotage '. Querard. 



3426 TRAITE de FORTIFICATION, contenant les Methodes anciennes et modernes pour la Con- 

 struction et la Deffense des Places, et la Maniere de les attaquer ; with 44 copperplates, 8vo. old calf 

 gilt, with marginal notes in an old hand, 5s 1694 



3427 - - L'USAGE de COMPAS de PROPORTION, explique et demonstre' d'une Maniere courte et 

 facile, et augmente d'un TRAITE de la DIVISION des CHAMPS ; derniere .d., augmentee ; with 2 

 copperplates of the Compass, and numerous diagrams, 8vo. old calf gilt, 8s Qd 1736 



The author was a noted mathematician of his time, and' his name recalls that of Frederic Ozanam and the short-lived 

 Catholic Revival in France under Lacqrdaire. 



3427*OZANNE (Jeanne Franqoise) DIFFERENTS SUJETS de MARINE ; ivith engraved title, and 11 

 copperplates, representing small craft of various rig, oblorg 12mo. nj. cl., }2sQd [c. 1780] 



12 * 



