HENRY SOMERAN & CO., 140, STRAND, W.C., AND 37, PICCADILLY, W. 311 

 6098 BEDELL (Frederick, Cornell Univ.] The PRINCIPLES of the TRANSFORMER, with folding plate 

 and 250 other illustrations, Svo. cl., Is Qd (p. 13s nett) New York, 1896 



6097 - , and Albert Gushing CREHORE : ALTERNATING CURRENTS : an Analytical and 

 Graphical Treatment for Students and Engineers, with 112 diagrams, 2nd [last] Ed., 8vo., cl., 

 4s Qd (p. 12s Qd) ibidem, 1893 



6098 BEDFORD (Arthur, chaplain to Frederick Prince of Wales) HOR^E MATHEMATICS VACU^E ; 

 or a TREATISE of the GOLDEN and ECLIPTIC NUMBERS ... for finding the Change of the Moon 

 for any Time past or to come ... by the Rectification of the Golden Number . . . and for 

 finding the Eclipses both of the Sun and the Moon, etc. etc. etc., diagrams, sm. 8vo. hf. bound 

 (rare), 12.9 Qd 1743 



Probably tlie only mathematical treatise ever written as a distraction from the pain of sciatica. The author, who was 

 chaplain to the Haberdashers' alinshouses at Hoxton, was a colleague of Bp. Jeremy Collier in his assault on the immor- 

 ality ot the Stage of the period ; and met his death at last through taking observations of the Comet of 174-3. 



6099 BEER (August, Univ.Bmn) EINLEITUNG in die H6-HERE OPTIK ; with 2 folding plates, and 

 262 other illustrations (some coloured), 8vo. hf. morocco neat, uncut, t.e.g., with auto, of Prof. 

 H. W. LI. Tanner, F.R.S., 2s Qd Braunschweig, 1853 



6100 - ANOTHER COPY: also, GRUNDRISS des PHOTOMETRISCIIEN CALCULES; with 40 illustra- 

 tions 2 vols. 8vo. in 1, hf. caff neat, 4s ibidem, 1853-4 



6101 - - TABULA, CURVARUM QUARTI ORDINIS SYMMETRICARUM, Asymptotis Rectis et Linea 

 Fundamental! Recta pneditarum ; with 35 plates, roy. 4to. sewn, with auto, of Prof. H. W. Li. 

 Tanner, F.R.S. (SCARCE), 10s Bonnae, 1852 



6102 BEHRENS (H.) ANLEITUNG zur MIKROCHEMISCHEN ANALYSE, with 92 woodcuts, roy. 8vo. 

 sewn, 2s Qd (p. M. 6) Hamburg, 1895 



6103 - ANLEITUNG zur MIKROCHEVIISCHEN ANALYSE der wichtigsten ORGANISCHEN VERBIN- 

 DUNGEN, Heft I II : Anthracengruppe, Phenole, Chinone, Ketone, Aldehyde, und die wichtig- 

 sten Faserstotfe ; with 3 coloured plates, and 67 woodcuts, 2 vols. roy. Svo. sewn, 4s (p. M. 7) 



ibidem, 1895-6 



6104 BEHRENS (Th. H.) MIKROCHEMISCHE METHODEN zur MINE RAL- ANAL YSE ; with plate, Svo. 

 sewn, Is Qd Amsterdam, 1881 



6105 BELIDOR (Bernard Forest de; F.R.S.) ARCHITECTURE HYDRAULIQUE, on FArt de conduire, 

 d'elever et de menager Jes Eaux pour les differens Besoins de la Vie ; with fine fronts, and vignettes 

 by Riqaud, and 221 Jolding plates of Waterworks, 4 vols roy. 4to. old hf. calf, uncut (RARE), 

 1. 10s 1737-53 



ORIGINAL EDITION, with best impressions of the plates, and on this account preferred to the later ones. 

 ' Ouvrage tres recherche, et qui n'a pas etc efface par ceux qu'on a faits depuis." Blojr. Gen. ' Un tresor de recherches 

 et de machines que 1 histoire de I'hydraulique doit toujours anuoncer et celebrer.' Montuda. 

 It is still valuable as a complete storehouse of contemporary hydraulic machinery. 



6106 BELL (Andrew, Dollar Academy) MATHEMATICAL and PHYSICAL TRACTS, with folding plate, 

 post Svo. boards, uncut, 4v Qd Edin., 1834 



Problems on Curves, the Development of Functions, etc. etc., the theory of the Overshot Water- Wheel and Barker's 

 Mill, Electrical Principle of Influuuce at a Distance, etc. etc. 



6107 BELL (Sir Isaac Lowthian, F.R.S.) The IRON TRADE of the UNITED KINGDOM, compared 

 with that of the other chief Iron-Making Nations, Svo. cl., 5s 1S86 



61 OS PRINCIPLES of the MANUFACTURE of IRON and STEEL, with Notes on the Economic 



Condition of their Production, 10 plates, thick Svo. cl. (SCARCE), with inscr. 'from the author', 

 1. Is 1884 



One of the most important treatises on the subject since the publication of Percy's ' Iron and Steel ' (v. No. 3541), 

 describing the result of a number of important 01 iginal investigations by one of the pioneers of the Cleveland iron trade. 



6109 BELL (Louis) The ART of ILLUMINATION [by Gas and Electricity, with Chapter on Photometry], 

 front., and 127 other illustrations, roy. Svo. cl., Is Qd (p. 10? Qd nett) New York, 1902 



6110 BELL (R. Bruce, C.E.) Ou PATENT SLIP DOCKS, with 2 plates, Svo. (pp. 11), sewn, 3s Qd 



Glasgow, 1S59 



The question of slip docks has recently assumed some importance in connexion with the building of ' Dreadnoughts.' 



6111 BELL (William James, F.C.S.) SALE of FOOD and DRUGS ACTS, 1875 and 1879, with Notes 

 and Cases, and Practical Observations, 12mo. cl., Is Qd (p. 4s) 1886 



6112 ANOTHER COPY, interleaved throughout, 12mo. limp roan, 4s 



The author's own copy, with his bookplate, and a number of MS. additions. 



6113 BELLANI (Ang-elo, Canpntco di Milano) CONGHIETTURE sopra un ANTICO SlNGOLARE 

 AKNESE di PREZIOSO METALLO disotterrato presso Como ; with plate, 4to. (pp. 12), sewn, 3s 



Milano, 1848 



6114 - Delia MAL'ARIA vicino ai FONTANILI d'lRRiGAZiONE, 4to. (pp. 34), sewn, 3s Modena, 1842 



6115 - Snllo SPOSTAMENTO del MERCURIO osservato al Punto del Ghiaccio sulla Scala dei 

 Termometri, 4to. (pp. 20), sewn, 3s ibidem, 1841 



6116 BELLENS (Charles) TRAITE des CHAUDJKRES a VAPEUR ; Etude sur la Vaporisation dans les 

 Appareils Industriels ; with 215 woodcuts, roy. Svo. cl., 10s (p. F. 20 nett) 1895 



6117 BELOE (Charles H.) On the CONSTRUCTION of CATCH- WATER RESERVOIRS in MOUNTAIN 

 DISTRICTS, with 6 plates and 2 tables (all folded and linen-mounted), Svo. hf. calf (out of 

 prints 4s 1872 



6118 BELPAIRE (Alphonse) TRAITE des DEFENSES d'ExpLOiTATiON aux CHEMINS de PER; 

 Ouvrage recline sur des Donnees Otticielles beiges, Svo. (pp. 648), sewn (scarce), 8s Qd Bruxelles, 1847 



BELTRAMI (E.) v. CHELINI, post. 



6119 BENISCHKE (Gustav) MAGNETISMUS und ELEKTRIZITAT mit Rticksicht auf die BEDURFNISSE 

 der PRAXIS ; with 202 illustrations, Svo. sewn, 3s Qd (p. M. 6) Berlin, 1896 



