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



455 BOIS-REYMOND (Emil du) Untersuchungen tlber thierische Elektricitat ; with 12 

 folding plates on copper, 2 vols, large 8vo. in 3, hf. calf gilt, £1. Is (p. M. 34 sewn.) Berlin, 1848-84 



A nice copy of this epocli-inakinj,' work, containing the result of his investigations into animal electricity, and first 

 inakiTig known the nature and magnitude of the electric forces in the nerves and muscles. 



456 : On Animal Electricity : an Abstract of his Discoveries, ed. by H. Bence Jones, 



F.R.S., ivith 50 woodcuts, 12mo. cl. {out of print), 5s 1852 



An abstract of the first 2 vols, of the above work. 



457 BOLAS (Thomas) Glass Blowing and Working, illustrated, post 8vo. cl., Is 6d [1898] 

 4.58 , and George E. BROWN : The Lens : its Choice, Use, and Testing, illustrated, 



Svo. cl., Is 6d 1902 



459 , Alex. A. K. TALLENT, and Edgar SENIOR: Handbook of PiiOTOGRArHY in 



Colours, 3 coloured plates, with numerous woodcuts, cr. 8vo. cl., 3s (p. 5* nett) 1900 



460 BOMBELLI (Rafaello) L'Algehra: Parte Maggiore del' Arimetica [sic], nuovaniente 

 posta in Luce ; with diagrams, thick cr. 4 to. old vellum (very rare*, £3. 3* Bologna, 1572 



First Edition of this iniportavit work, the first which laid the foundation of a knowledge of imaginary quantities. 

 'A systematic exposition of the knowledge then current on the subject, lie discusses radicals, real and imaginary. He 

 also treats the theory of equations, and shows that in the irreducible cases of a cubic equation the roots are all real ; and 

 he re?uarks that the problem to ^ri.sect a given angle is tlie same as that of the solution of a cubic equation . . . Ilis 

 work is noticeable for his use of symbols Avhich indiciite an approach to index notation. Following iu the steps of 

 Stifel, he introduced a symbol, ^for the unknown (luantity.^for its square, ^for its cube ', etc. etc. etc.— IF. W. R. Ball. 



4f)l BONGO [latine BCTNGUSJ (Pietro) Numerorum Mysteria, ex abditis plurimaruin dis- 

 ciplinarnni fontibus hansta : Opus Maxiniaruni Keruni Doctrina, et Copia refertuni : in quo 

 mirus in priniis, idenique perpetuus Arithmetical Pythagorica? cum Divinre Paginie Numeris 

 consensus, multiplici ratione probatur, II. editio, recognita, et tertia ainplius parte locupletata, 

 4to. old vellum {some II. luatcr-stained, otherwise a sound and large copy), £1. \s Bergomi, 1591 

 The second edition of this curious mystical work was the last revised by the author, and is very' rare. 'He 

 worked witli great industry and satisfaction on ()6(5, which is the Number of the Beast in Revelation (xiii. ]S), the symbid 

 of Antichrist. He reduced the name of the ' impious ' Martin Luther to a form which may express the formidable 

 number. Placing a = 1, b = *2, etc., k=10, 1 = 20, etc., he finds after misspelling the name that Martin Lutcra 

 constitutes the number reqiured.' — Prof. Cojori. 



462 BONNET (Ossian) Lecons de Mecanique Elementaire, I^ Partie (seule parue) ; with L35 

 diagrams, 8vo. seicn, 3s ' 1858 



Containing important contributions on variable curvature. 



403 BONNEY (Thomas George, pr., f.r.s.) The Story of our Planet, coloured plates and maps, 

 and numerous woodcuts, roy. 8vo. cl., 5s 6d (p. 10^ 6c/) [1896] 



484 BONSDORFF (Pehr Adolph v.) Tentamen Mineralogico-Chemicum de Pargasite, 

 4to. (pp. 20), sewn {name cut off title), 3s Qd Aboce [1810] 



465 BOOLE (George; f.r.s.) Investigation of the Laws of Thought, on which are founded tlie 

 Mathematical Theories of Logic and Probabilities, 8vo. cl., imcut (VERY scarck) £L 156- 1854 



' It is to his ' Laws of Thought' that his most durable fame will attach. It is a work of astonishing originality and 

 poAver, and one which has only recently come to be properly appreciated '.—/J. N. li. 



466 ■ Treatise on Differential Equations, first edition, plate ; with the Supplementary- 

 Volume [ed., with Preface, by ISAAC TODHUNTER, f.r.s.], 2 vols, post Svo., hf. calf {backs not 

 uniform) ; VERY SCARCE, £1. 2s Qd Cambridge, 1859-65 



467 Another Copy, origiiud cl, uncut, £1. 5.9 



The Supplementary Volume, which has now become very scarce, has never been incorporated with the following 

 editions of the 'Treatise,' and contains all Prof. Boole wrote with a view to enlarge the original work in a later edition. 



' A standard text-book on Differential Eqvations, including oiiginal matter on integrating factors, singular solutions, 

 and especially on symbolical actions.'— iVo/. Cajori. 



468 Treatise on the Calculus of Finite Differences, first edition, post 8vo. hf calf 



(scarce), 15s ibidem, 1860 



469 Another Copy, cL, vncut, £1. Is 



The above copy belonged to Prof. Arthur Cayley, f.r.s., and has added two original equations in his handwriting 

 on pp. 2i and 27. It also bears the inscr. ' From the Author'. 



470 Second I^^dition, by Sir John Fletcher Moulton, l.j., post 8vo. cl. (scarce), £1. Is 1872 



' His treatise on Finite Diffcrc7ice.s (18(50) and his Lans of Thought (lS-')4) are works of high merit.' — I'rof. Cajori. 



471 BOOTH (James, ^?r., f.r.s.) Tlie Theory of Elliptic Integrals, and the Properties of Surfaces 

 of the Second Order, applied to the Investigation of the Motion of a Body round a Fixed Point, 

 diagrams, 8vo. boards {scarce), 10s (jd 1851 



This work first contains the author's invention of tangential co-or<linatcs, generally known as the 'Boothian Co- 

 ordinates.' 



472 BOE.ELLI (Giovanni Alfonso) Historia et Meteorologia Incendii Aetna^i anni 1669, 

 accessit Responsio ad Censuras Honoratii Fabri contra librum de Vi Percussionis ; with 

 folding view on copper, and woodcuts, 4to. old calf, 8s 6d Begio Julio, 1670 



473 ^ De MOTU Animalium, Ed. novissima ; additic sunt Meditationes mathematicaj de IVIOTU 



IVIUSCULORUM ; with front, and 19 copperplates, 2 vols. cr. 4to. in 1, old ccdf {sound copy). Vis 



Lugd.Bat., 1710 

 Best Edition of the author's most important work, applying the laws of mechanics to animal motion. 



474 De Vi Percussionis ; editio princeps ; icith 5 plates, sm. 4to. fine large copy in old 



mottled calf gilt, ivith bookplate of Philip 2nd Earl Stanhope {rare), 12s Qd Bononioi, 1667 



The first work on the laws of percussion, which undoubtedly influenced John Wallis, who in 1608 inibli.shcd his 

 discovery of the laws governing the percussion of non-elastic bodies, and Christiaan Huygens, who deals on the 

 percussion of elastic bodies in his treatise 'de motu corporum ex percussion(! ', published in 1069. 



475 BORGNIS (J. A.) Thp:orie de la Mecanique Usuelle ; contenant la theorie des motenrs, dcs 

 effets utiles des machines, desorganes niecaniques intermediaires, etc., etc. ; with 5 folding plates, 

 4to. hf calf 4s ' 1821 

 BORGO (Luca di)— v. Pacioli, post. 



