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



330 BENEDETTI [Latine BENEDICTUS] (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. 2s Taurini, 1585 



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

 resolu geometriquement la plupart des theoremes de I'arithmetique et de 1'algebre elementaire. . . Dans sa Jli-canique, il 

 a su expliquer 1'action de plusieurs machines ; ila connu la force centrifuge, et il a dit que, laissos en liberte, les corps 

 s'echappent par la tangente ; 1'equilibre du levier recourbe a etc bien determine par lui ; et il a reduit le inouvement d'uu 

 corps a celui dc son centre de gravite.' Libri. 



331 EDITIO ALTER A, in quo mira Subtilitate continentur : THEOREM ATA ARITHMETICA ; de 



RATIONIBUS OPERATIONUM PERSPECTIVE ; de MECHANICIS ; Disputat. de quibusdam placitis 

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

 diagrams; folio, sewn (water -stained) ; RARE, 1. 15s 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 ; with numerous woodcuts of 

 geometrical figures, folio, old parchment (back of binding wormed, and lower margin ivater- 

 stained); RARE, 1. 10s Augustce Taurinorum, 1574 



'Fort savant, mais peu accessible au cominun des lecteurs.' MontucJa. 'Contenant des recherches interessantes.' 

 Libri. 



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 ; exhibiting the various Transmutations of Supertices [sic] and 

 Solids, etc. etc., including SOLUTIONS to the yet UNANSWERED PROBLEMS of the ANCIENTS, with 

 numerous plates, comprising 179 figures, 8vo.c/. (SCARCE), 15s 1838 



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 the 

 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 6d 1837 



336 BENSON (Lawrence Sluter) FACTS and FIGURES for MATHEMATICIANS ; or the Geometrical 

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



New York [c. 1868] 



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



3s 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. 1 Preface. The author was a lifelong foe to a Reductio ad absurdum. 



338 BENZENBERG (Johann Friedrich) VERSUCHE tiber das GESETZ des FALLS, iiber den 

 WIDERSTAND der LUFT und iiber die UMDREHUNG der ERDE, nebst der Geschichte aller 

 friiheren Versuche von Galiliii bis auf Guglielmini ; with vignette and 8 copperplates, 8vo. original 

 boards, uncut (FINE COPY) ; VERY RARE, 1. 15s 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 

 ' Michaelisturm ' 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, Upsala) DISSERTATION on ELECTIVE ATTRACTIONS, trans, from the 

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

 and tables, Svo.fine copy in old tree- calf gilt (SCARCE), 1. 5s 1785 



3 tO ANOTHER COPY, old sheep, newly rebacked in hf. calf gilt, 1. 2s 6d 



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, with copperplates, 2 vols. 8vo. nice copy in old calf gilt (rare), 

 1. Is 1788 



342 ANOTHER COPY, boards, uncut, 18s 6d 



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

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



343 BERGSMA (Cornells Adriaan) RESPONSIO ad QU^STIONEM e CHEMIA APPLICATA ab Ordine 

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



A NEWLY BOUND SET : 



3i4 BERICHTE der DEUTSCHEN CHEMISCHEN GESELLSCHAFT zu BERLIN; from 

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

 8vo. newly bound in hf. calf neat, 27. 10s 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 



316 A SERIES from 1896 to 1901 (Jahrgang 29-34), with portraits, 18 vols. 8vo. in parts as issued, 



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



