HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 37, PICCADILLY, VV. 301 



5900 BACCI (Andrea) De THERMIS Libri VII, in quibus agitur de Universa AQUARUM NATURA, 

 deque Differentiis omnibus, ac MISTIONIBUS cum Terris, cum Ignibus, cum Metallis ; de Lacubus, 

 Fontibus, Fluminibus ; de Balneis totius Orbis et de Methodo medendi per Balneas, etc. etc., 

 editio princeps; with plan, folio, old Italian vellum (some II. stained) ; RARE, 1. Is. 



Venetiis, V. Valgrisius, 1571 



1 Belle edition d'un ouvrage estirae.' Brunei. ' Ouvrage fort estime.' Graesse. The de Gaignat copy of this edition 

 fetched F. 100, the La Valliere F. 64, and the Libri 2. 4s in 1859. 



5901 BACHET de MEZIRIAC (Claude G-aspard, s.j.) PROBLEMES PLAISANTS et DELECT ABLES, 

 qui se font par les NOMBRES ; 5 e Ed., revue, simplified, et augmente'e par A. LABOSNE, 8vo. sewn, 

 3s 1884 



' Containing an interesting collection of arithmetical tricks and questions.' W. W. R. Ball. 

 V. DlOPHANTUS, post. 



5902 BAGHHOFFNER (George Henry) POPULAR TREATISE on VOLTAIC ELECTRICITY and 

 ELECTRO-MAGNETISM, with folding plate, 8vo. (p 35), sewn, 3s Qd 1838 



The author was the inventor of several electrical apparatus described in the above pamphlet. 



5903 BACHMANN (Paul, Univ. Breslau) Die ANALYTISCHE ZAHLENTHEORIE, 8vo. sewn, with 

 auto, of Prof. H. W. LI. Tanner, F.R.S., Is Qd (p. M. 12) Leipzig, 1894 



5904 - Die ELEMENTE der ZAHLENTHEORIE, 8vo. sewn, 4s (p. M. 6.40) ibidem, 1892 



' He investigated the arithmetical formula which gives the automorphics of a ternary quadratic form.' Prof. Cajori. 



5905 - Die LEHRE von der KREISTHEILUNG und ihre Beziehungen zur ZAHLENTHEORIE, 8vo. 

 sewn, 4s (p. M. 7) ib., 1872 



'A standard work.' Prof. Cajori-, 



5906 BACKLUND (Johann Oskar ; Pulkowa Observatory) Uber die BEWEGUNG einer gewissen 

 Gruppe der KLEINEN PLANETEN, 4to. (pp. 54), sewn, 2s St. Petersbourg, 1892 



5907 - CALCULS et RECHERCHES sur la COMETE d'ENCKE. I: Tables pour le Calcul de I'Anomalie 

 Eccentrique, roy. 4to. sewn, 2s ib. y 1892 



5908 - Zur ENTWICKELUNG der STORUNGSFUNCTION, impl. 4to. (pp. 33), sewn, Is Qd ib., 1884 



5909 - Zur THEORIE des ENCKE'SCHEN COMETEN, impl. 4to. (pp. 84), sewn, 2s Qd ib., 1881 



5910 BACON (Sir Francis, VISCOUNT ST. ALB AN) HISTORIA Naturalis et Experimentalis de 

 VENTIS, etc. ; with engraved title, 24mo. old vellum, 10s 6d Amstelodami, ex Off. Elzeviriana, 1662 



5911 - : The NATURALL and EXPERIMENTALL HISTORY of WINDS, &c. Written in Latine by 

 the Right Honorable Francis Lo : Verulam, Viscount St. Alban, translated by R. G. Gent., first 

 edition, 18mo. old calf, rebacked (portrait wanting and some corners water -stained) ; VERY RARE, 

 2. 15* Humphrey Moseley, 1653 



Although Bacon's theory of winds is still based on the Aristotelian conceptions, the work is important as collecting all 

 the facts and theories then known on the subject, and especially as the first to point out the deflexion of winds caused by 

 the earth's rotation. 



Copies of the above edition fetched at auction 8. 15s in 1909, and 9. 10s in 1902. 



5912 BACON (John Mackenzie, pr.), The RECORD of an AERONAUT, being the LIFE of, by his 

 Daughter GERTRUDE, with photogravure portrait and 62 illustrations on 40 plates, 8vo. cl., Qs 

 (p. 165 nett) 1907 



Valuable for the numerous photographs taken from a balloon. 



5913 BACON (Roger, O.M.; 'Doctor Mirabilis') OPUS MAJUS ad Clementem IV. Pontificem Maxi- 

 mum, primum a SAMUELE JEBB, M.D., Londini editum MDCCXXXIII, nunc vero diligenter 

 recusum ; accedit PROLOGUS GALEATUS in reliqua Opera ejusdem Autoris ; with 2 folding plates, 

 folio, boards, uncut (blank bottom margins slightly stained, otherwise a REMARKABLY FRESH AND 

 WHOLLY UNCUT COPY); very rare, 3. 10s Venetiis, Franc. Pitterus, 1750 



' Infiniment rare'. Graeste. It is a reprint of the London edition of this, the greatest scientific and philosophical 

 work of the Middle Ages : 'at once the Encyclopaedia and the Organon of the Thirteenth Century' ; and preferable to it 

 as containing the Prologus Galeatus, which is not included in the former. It contains, i.a., De Centris Gravium : De 

 Ponderibus : De Valore Musices : De Arte Experimental! : De Radiis Solaribus : De Coloribus per Artem Fiendis: De 

 Visione Reflexa et Fracta : De Scientia Perspectiva, etc. etc. The preface contains valuable biographical information. 



'It summarized what was then known in physical science, and laid down the principles on which it, as well as philo- 

 sophy and literature, should be studied. He stated as the fundamental principle that the study of natural science must 

 rest solely on experiment ; and in the fourth part he explained in detail how astronomy and physical sciences rest 

 ultimately on mathematics, and progress only when their fundamental principles are expressed in a mathematical form. 

 Mathematics, he says, should be regarded as the alphabet of all philosophy.' W. W. R. Ball. 



Yet Friar Bacon, the greatest illustration of the Middle Ages, was held up by his University as a quack exhibiting his 

 Brazen Head at the Oxford Pageant of a few years ago. 



5914 BADEN-POWELL (Major Baden F. S., F.R.A.S.) PRACTICAL AERODYNAMICS, and the 

 THEORY of the AEROPLANE: Principles evolved by Past Experiments, Part I, with 2 plates, and 

 diagrams, 8vo. cl. boards, 2s 6d [1909] 



5915 BAGAY (Valentin) NOUVELLES TABLES ASTRONOMIQUES et HYDROGRAPHIQUES, contenant 

 un Traite abrege des Cercles de la Sphere ; la Description des Instruments a Reflexion ; diverses 

 Methodes pour obtenir les Latitudes et les Longitudes terrestres ; une nouvelle Table de Log- 

 arithmes, des Sinus, etc. etc , de Seconde en Seconde, pour les 90 dn quart du Cercle ; with 5 folding 

 plates, 4to. (pp. 832), calf gilt (VERY SCARCE), 2. 2s Didot, 1829 



'Computers have always preferred Bagay's Nouvelles Tables (1829), which also contain a complete logarithmic canon to 

 every second. The change in the column is very clearly marked by a large black nucleus, surrounded by a circle, printed 

 instead of zero. Bagay's work has now become very rare.' J. W. L. Glaisher, F.R.S. 



5916 [BAIF latine] BAYFIUS (Lazare de; French ambassador to Venice) ANNOTATIONES in 

 LEG EM II. de CAPTIVIS, et postliminio reversis, in quibus tractatur de RE NAVALI, per Auctorem 

 recognitse ; ejusdem Annotatt. in Tractatum de Auro et Argento legato, etc. etc. ; item ANTONII 

 THYLESII de Coloribus Libellus, etc. ; with large woodcuts of galleys etc. ascribed to GEOFFROY 

 TORY, sm. 4to. old vellum (some corners inked, otherwise a large and sound copy) ; RARE, 1. 10* 



[col. :] Basilece, Hier. Frobenius et Nic. Episcopius, 1541 



' II est bien imprime et contient de belles eravures sur bois.' Brunet. The work by Antonio Telesio is of importance as 

 one of the first attacks on the Aristotelian basis of physics. 



