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



6435 BOYS (Charles Vernon, F.R.S.) SOAP-BUBBLES, and the Forces which mould them, with front., 

 and 68 woodcuts, and folding plate of thaumatrope, cr. 8vo. cl., Is Qd 1890 



643G BULLES de SAVON: Conferences sur la Capillaribe, trad, par CHARLES EDWARD 



GUILLAUME ; avec de nouvelles Notes de PAuteur ct du Traducteur ; with front., folding plate, 

 and 60 woodcuts, cr. 8vo. cl., 2s 1892 



6437 BRADDOCK (Jolm, Deputy Commissary of Ordnance) MEMOIR on GUNPOWDER, discussing 

 the PRINCIPLES both of its MANUFACTURE and PROOF, with front., 8vo. hf. cl., 5s 1832 



6438 BRADWARDINE (Thomas, 53rd Abp. of Canterbury ; 'doctor profundus') : GEOMETRIA 

 SPECULATIUA THOME BRAUARDINI recoligens omnes conclusiones geometricas studentibQ artiii z 

 philosophic ARISTOTELIS valde necessarias simul cum quodam tractatu de QUARDRATURA [sic] 

 CIRCULI nouiter edito [a PETRO SANCHEZ CIRUELO] ; editio princeps ; handsomely printed in 

 gotl)tr letter, with fine woodcut with printer's device on title, and numerous geometrical figures on 

 margins; the initials painted in red and blue, 4to. limp white vellum, with leather tiers (A FINE 

 AND VERY LARGE COPY) ; very rare, 8. Ss [col. :] . . . operaq} Guidonis mercatoris 



diligetissime impresse parisiv in capo gaillardi. Anno dni. 1495. die 20. maij 



The most important of the author's writings, and of excessive rarity, especially in the above first edition. It consists 

 of signatures A C in sixes, and D in four, or 22 11. in all, without foliation or catchwords, the last leaf being blank. 

 Hain (3712) had seen no copy of the work and was unable to give a collation, which is supplied in Dr. Copinger's 

 ' Supplement.' It is Mr. Proctor's no. 7907. The above copy is, save for some slight pin-holes, in an EXCEPTIONALLY CHOICE 

 CONDITION, with large margins. 



It treats inter alia of star polygons, and, according to M. Chasles ; contains ' une theorie nouvelle qui doit faire honneur 

 an XIV Siecle,' as well as ' discussions on the infinite and infinitesimal subjects never since lost sight of.' Prof. Cajm-i. 

 The treatise on circle-squaring is, according to Pro f . de Morgan, probably by the editor. A full account of the work may 

 be found in Prof. Cantor's ' Vorlesungen iiber Geschichte der Mathematik ', v. II (1892), pp. 102-9. 



The late Dean Stephens, in his interesting article in D. N. />'., gives 1030 as the first edition of this work, but really 

 mentions it under the title ' De Quadrature Circuli', 1495. Abp. Bradwardine was as eminent as a man and a theologian 

 as he was as a mathematician. He was a Sussex man of Chichester, and an early student at Merton College, where he 

 wrote his celebrated 'De Causa Dei contra Pelaginm ', which became the standard work in Augustinian theology, and 

 caused him to be referred to in the ' Nun's Priest's Tale '. He held the unpleasant office of Confessor to Edward III., and 

 gave Christian exhortation to the troops on the eve of the Battle of Crecy. He was consecrated to the Archbishopric at 

 Avignon in 1349, and at once hastened to his diocese although the Black Death was raging; was seized with it on the 

 morrow of his arrival in Lambeth, and died two days after. 



6439 BRAKE (Tyge, latine Tycho) ASTRONOMIC INSTAURAT.E MECHANICA ; with portrait within 

 armorial border, and very numerous large engravings on wood and copper of astronomical instru- 

 ments, folio, boards (browned as usual, otherwise a SOUND AND LARGE COPY) ; VERY RARE, 3. 3* 



Noribergo3, Levinus Hulsius, 1602 



This is Tycho Brahe's chief work, now of gi'eat rarity, and very valuable for containing descriptions and illustrations 

 of the astronomical instruments used by him at Uranienborg Observatory, which for the first time made possible 

 approximately accurate measurements, and thus gave the great impetus to the study of practical astronomy, which as its 

 first-fruit produced the genius of Kepler. Many of the instruments were of the author's own invention, e. g. the 

 mural quadrant (quadrans maximus), while nearly all others received great improvements from him. 



6440 - OPERA OMNIA, sive ASTRONOMIC INSTAURAT^E PROGYMNASMATA, in II Partes distribute, 

 quorum I. de RESTITUTIONS MOTUUM SOLIS et LUN^E, Stellarumque Inerrantium tractat. II. de 

 MUNDI ^ETHEREI Recentioribus Phaenomensis [sic] agit ; with plate, and numerous diagrams, 4to. 

 old Italian vellum (browned, but sound copy], with Prof. JRiccardi's booklabel (RARE), 2. 2s 



Francofurti, Godofredus Schonwetterus, 1648 



Containing observations on the comet of 1577, the right ascension and declination of 100 stars, and lunar and solar 

 theories, but above all noteworthy for explaining the peculiar planetary system invented by the author, which for some- 

 time found many followers, and among them Sir Francis Bacon. It also includes a reprint of the author's ' De Nova Stella ' 

 (</. c. infra). 



6441 - HISTORIA CCELESTIS [complectens Observationes Astronomicas varias ad Historian! 



Coclestem speetantes, cum Commentariis Lucn BARRETTI [ALBERTI CURTII] et Paralipomenis 

 ad Historian! Ccelestem, ex Recensione et MSS. GuiL. SCHIKARDI] ; with fine full-size portrait 

 and front, representing the Emperors Rudolph II., Ferdinand II. and III., and Leopold I. , with 

 celestial and terrestrial globes, both by P. KILIAN, plate of views, and very numerous woodcuts, 

 including large ones of Astronomical instruments, 2 vols. folio, old Italian vellum (some II. stained, 

 otherwise a VERY FINE COPY) ; RARE, 3. 105 [col. :] Augusta Vind., Simon Utzschncider, 166G 



FIRST EDITION of this rare work, containing the author's astronomical observations between 1582 and 1601, at the 

 Observatory of Oranienborg Castle, and including his Catalogue of Fixed Stars, pronounced to be ' more perfect than any 

 that had previously appeared.' The copious and interesting preface contains beautiful woodcuts of the astronomical 

 instruments in use at the time. 



' He made the first table of refractions, and discovered the variation and annual equation of the moon, th incf|ualitit-s 

 of the motion of the nodes, and the inclination or the lunar orbit, and rejected the trepidation of the precession, which 

 had hitherto injuriously affected all tables. He also made some interesting cometary investigations.' 



6442 - - METEOROLOGISCKE DAGBOG, holdt paa Uraniborg for Aarene 1582-97, udgiven af det Kgl. 

 Danske Videnskabernes Selskab ; with diagrams, large 8vo. boards, uncut, 6s Qd Kjbbenhavn, 1876 



With appendixes 'Sam mend rag af Vejr-Jagttagelserne i Tyge Brahes Meteorologiscke Dagbog ', ' Resume d'un Journal 

 .Mi leorologique par Tycho Brahe ', both by POUL LA COUR, and Index. 



' The principal interest attached to it arises from the short notes about the arrival or departure of Tycho, his pupils or 

 visitors.' Dr. Dreyer. It is moreover valuable as testifying to the uniformity of the climate with that now prevailing. 



6443 De NOVA STELLA ; denuo edidit Regia Societas Scientiaruni Danica ; with portrait and 



fs. auto., 4to. sewn, uncut, Is Qd Hauniae, 1901 



A fs. reprint of the excessively rare original edition of 1573, with preface and appendix (in Danish''. It was the author's 

 first work, and contains h is discovery, on Nov. Il,l572,of a new star in Cassiopeia, which became again invisible in March, 1574. 



6444 : DREYER (John Louis Emil, F.R.A.S., Director of Armagh Observatory) TYCHO HRAHE : 



a Picture of Scientific Life and Work in the XVI. Century, with portrait, 4 plates, and woodcuts, 

 8vo. cl., 5s (p. 12s Qd) Edin,, 1890 



Forming a highly interesting account of the state of astronomy from its revival by Peuerbach and Regiomontanus to 

 Kepler. The author is a countryman of his illustrious subject. 



