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



6435 BOYS (Charles Vernon, f.r.s.) Soap-Bubules, and the Forces which moiikl them, loith front., 

 and 68 woodcuts, and folding plate of thaumatrope, er. 8vo, cl.. Is 6d 1890 



6430 BuLLES de Savon: Conferences sur la Capillarite, trad, par Charles Edward 



GuiLLAUME ; avec de nouvelles Notes de I'Auteur et dii Traducteur ; with front., folding plate, 

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



6437 BRADDOCK (Jolin, 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, 53rc? Ahp. of Canterbury ; 'doctor profundus') : Geometria 

 Speculatiua Thome brauardini recoligens omnes conchisiones geometricas studentib9 artiil z 

 philosophie ARISTOTELIS valde necessarias siniul cum quodam tractatu de quardratura [s^c] 

 CIRCULI nouiter edito [a Petro Sanchez Ciruelo] ; editio princeps ; handsomely printed in 

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

 margins; the initials painted in red and blue, Aio.limp white vellum, with leather tiers (A fine 

 and very large copy) ; very rare, £8. 85 {col. .] . . . operaq} Guidonis mercatoris 



diligetissime impresse parisi9 in cdpo gaillardi. Anno dni. 1495. die 20. 'maij 

 Tho 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. 7997. The above copy is, save for some slight pin-holes, in an exckptionally choick 

 fONDiTioN, 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. Cajori. 

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

 be found in Prof. Cantor's ' Vorlesungen iiber Geschichte der Matheraatik', v. 11 (1892), pp. 102-9. 



The late Dean Stephens, in his interesting article in D. N. II., gives 1530 as the first edition of tliis work, but really 

 mentions it under the title ' De Quadratura Cireuli', 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 Pelagium ', 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 oflice 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 

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



6439 BRAHE (Tyge, latine Tycho) Astronomic Instaurat.e Mechanica ; with portrait within 

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

 ments, folio, boards {browned as usual, otherwise a SOUND AND large copy) ; very rare, £3. 3.v 



Noriberga\ Levinus Hulsius, 1602 



This is Tycho Brahe's chief work, now of great 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 

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

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



6440 Opera Omnia, sive Astronomic Instauratc Progymnasmata, in II Partes distributa, 



quorum I. de RESTITUTIONS MOTUUM SoLls et LUNC, Stellarumque Inerrantium tractat. II. de 

 MUNDI ^Etherei liecentioribus Phsenomensis [sic] agit; ivith plate, and numerous diagrams, 4tio. 

 old Italian vellum {browned, but sound copy), with Prof Riccardi's boohlabel (rare), £2. 2* 



Francofurti, Godofredus Schonwetterus, 1648 



Containing observations on the comet of 1577, tho 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 ' 



{q. V. infra). 



6441 HiSTORiA Ccelestis [complectens Observationes Astronomicas varias ad Historiam 



Calestem speetantes, cum Commentariis Lucil Barretti [Alberti Curtii] et Paralipomenis 

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

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

 celestial and terrestrial globes, both by P. KiLlAN, 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. IO5 [col. .•] Augustw Vind., Simon Utzschncider, 1666 



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, the inequalities 

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

 had hitherto injuriously att'ected 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, Qs Qd Kjobenhavn, 1876 



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

 Meteorologique par Tycho Brahe ', both by Poui, 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 Nov A Stella ; denuo edidit Regia Societas Scientiarum 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 his discovery, on Nov. ll,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 Brake : 



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



8vo. cl., 55 (p. 125 6rf) 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. 



