18 HENRY SOTHERAN & CO., 140, STRAND, W.C, and 37, PICCADILLY, W. 



330 BENEDETTI [Latine BENEDICTUSJ (Giovanni Battista) Diversarum Specula- 

 TiONUM Mathematicarum et Physicarum Liber ; with woodcuts and numerous diagrams, 

 folio, old calf {blank margin of some II. water-stained, otherwise a sound and VERY tall copy) ; 

 RARE, £2. 2* ' Taurini, 1585 



' C'est dans les Speculations inathematiqucs qu'il a consigne les plus remarquables de ses travaux. . . II a construit et 

 resolu geometriquenient la plupart des theoreines de I'arithmetique et del'algebre elementaire. . . Dans sa Mecauique, il 

 a su expliquer Taction de plusieurs machines ; ila connu la force centrifuge, et il a dit que, laiss-is en liberie, les corps 

 s'echappent par la tangente ; I'equilibre du levier recourbe a ete bien determine par lui ; et il a reduit le mouvement d'un 

 corps a celui de son centre de gi-avite.' — Lihri. 



331 Editio Altera, in quo niira Subtilitate continentur : Theoremata Arithmetiga ; de 



Rationibus Operationum Perspective ; de Mechanicis ; Disputat. de quibusdam placitts 

 Aristot. ; in V. Euclidis Librum ; Pliysica et Mathematica Responsa per Epistolas ; with numerous 

 diagrams; folio, sewn {ivater-sfained) ; RARE, £1. 15* Venetiis, 1599 



a very rare edition, unknown to Brunet and Poggendorff, of the most important work of the most prominent precursor 

 of Galileo in the domain of mechanics. He first explained that a rotating body on being released flies off in a tangential 

 path, thus belying the old idea of centrifugal force (as embodied in the word), that bodies have a tendency to fly out- 

 wards from the centre round which they are revolving. He also showed remotely that he understood accelerated motion, 

 and that he had some knowledge of momentum and inertia. 



332 De Gnomonum Umbrarumque Solarium Usu Liber ; ivith numerous ivoodcuis of 



geometrical figures, folio, old paixhment {back of binding wormed, and loiver margin ivater- 

 stained); rare, £1. 105 Augusta; Taurinor urn, 1574 



'Fort savant, mais pen accessible au commun des lecteurs.'— Montucla. ' Contenant des recherches interessantes.' — 

 LibH. 



333 BENEDIKT (R.) The Chemistry of Coal Tar Colours, trans, and ed., with Additions, by 

 E. Knecht, illustrated, post 8vo. cl. {out of print), 5s ^ 1886 



334 BENNETT (John, c.e.) The Arcanum, comprising a concise Theory, of Practical, Element- 

 ary and Definitive Geometry; exhibitino; the various Transmutations of Superfices [mc] and 

 Solids, etc. etc., including Solutions to the yet Unanswered Problems of the Ancients, with 

 numerous plates, comprising lid figures, Svo.cl. (scarce), 15* 18.38 



a very curious — and unquestionably original — attempt at teaching a knowledge of geometry by the use of geometrical 

 figures with only a very short explanatory text. The illustrations comprise ' Divisions of the Sphere ' invented ' by tlie 

 author', ' Napoleon's Problem to his Staff', etc. etc. 



335 Original Geometrical Illustrations; or the Book of Lines, Squares, Circles, Triangles, 



Polygons, etc., showing an Easy and Scientific Method for increasing, decreasing, and altering any 

 given Circle, Square, Triangle, Ellipsis, Parallelogram, Polygon, etc. to any other Figure contain- 

 ing the same Area, by plain and simple Methods, laid down agreeably to Mathematical Demon- 

 stration, with 55 plates and numerous diagram^, 4to. cl., 10s Gd 1837 



336 BENSON (Lawrence Sluter) Facts and Figures for Mathematicians ; or the Geometrical 

 Problem which Benson's Geometry alone can solve, diagram,s, post 8vo. (pp. 22), sewn, 3s 



New York [c. 1868] 



337 [ ] Mathematics in a Dilemma, Complimentary Edition, diagrams, 8vo. (pp. 17), sewn, 



35 Qd ibidem, 1879 



' I shall show that mathematicians have been blundering for 2300 years in their first inception of geometry, and through- 

 out all the deductions and conclusions therefrom.'— Pre/ace. The author was a lifelong foe to a Reduclio ad absufdum. 



338 BENZENBERG- (Johann Friedrich) Versuche liber das Gesetz des Falls, liber den 

 WiDERSTAND der Luft und liber die Umdrehung der Erde, nebst der Geschichte aller 

 friiheren Versuche von Galilai bis auf Gnglielmini ; with vignette and 8 copperplates, 8vo. original 

 boards, uncut (FINE COPY) ; VERY RARE, £1. \5s Dortmund, 1804 



The most important of the author's writings, wherein he first proved that every body dropped from a great height fell 

 in an Easterly direction, owing to the earth's revolution round its axis. His experiments— based on a suggestion made by 

 Sir Isaac Newton, and previously unsuccessfully attempted by Hooke and Guglielmini— were made from the top of the 

 ' Michaelistnrm ' of Hamburg, covering a height of 235 feet, and were of great importance as conclusively proving the 

 rotation of the earth. 



339 BERGMAN (Torbern Olof, Uptsala) Dissertation on Elective Attractions, trans, from the 

 Latin by the Translator of Spallanzani's Dissertations [Edmund Cullen, M.D.] , with folding plates 

 and tables, 8vo. fine copy in old tree-calf gilt (scarce), £1. 5^ 1785 



310 Another Copy, old sheep, newly rebacked in hf calf gilt, £1. 2^ Qd 



The author was the first to recognize the influence of warmth on chemical affinity, and in the above work gives tables of 

 chemical affinities which are still recognized as the most correct and most complete. 



341 Physical and Chemical Essays, trans, from the Latin, with Notes and Illustrations, by 



Edmund Cullen, m.d., Dublin, icith copperptlates, 2 vols. 8vo. nice copy in old calf gilt (rare), 

 £1. \s 1788 



342 Another Copy, boards, uncut, \%s Gd 



Containing the most important of the author's chemical works save ' Elective Attraction ', and giving descriptions of 

 how to reduce insoluble nnnerals by smelting with alkalies, and suggesting improved methods in analytical chemistry. 



343 BEB.GSMA (Cornells Adriaan) Responsio ad Qu^estionem e Chemia Applicata ab Ordine 

 Disciplinarum Mathematicarum et Physicarum propositam, 4to. (pp. 52), sewn, 3* Gd Groningce, 1821 



A newly bound set : 



344 BERICHTE der DEUTSCHEN CHEMISCHEN GESELLSCHAFT zu BERLIN; from 

 1875 (Jahrgang VIII) to 1904 (Jahrgang XXXVII) ; ivith fine portraits and illustrations, 82 ^vols. 

 8vo. newly bound in hf. calf neat, £27. 106r Berlin, 1875-1904 



345 Another Set, from 1878 (Jahrgang XI) to 1901 (Jahrgang XXXIV) ; with portraits and 



illustrations : 1878-1892 bound in 31 vols. hf. morocco gilt, cl. sides, and the rest in parts as issued 



(A SOUND LIBRARY SET), £17. 17s ib., 1878-1901 



346 A Series from 1896 to 1901 (Jahrgang 29-34), ivith p>ortraits, 18 vols. 8vo. in parts as issued, 



£3. 10s (p. M. 240 nett) ib., 1896-1901 



