HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 37, PICCADILLY, W. 113 



2252 KEITH (Thomas) INTRODUCTION to the THEORY and PRACTICE of PLANE and SPHERICAL 

 TRIGONOMETRY, including the THEORY of NAVIGATION, improved Ed., with plates and diagrams, 

 8 vo. en If ( join ts cracked] ,3s 1810 



2253 KEKULE (Friedrich August v.) LEHRBUCH der ORGANISCIIEN CHEMIE, fortgesetzt unter 

 Mitwirkung v. R. ANSCHUTZ und G. SCIIULTZ, Band 2-3, und Bd. 4 Lfg. 1 (soAveit 

 bisher erschienen), roy. 8vo. in parts as issued (partly out of print), 12.s 6d (p. M.41.) 



Erlangen, \SQ3- Stuttgart, 1883 



Prof. Kekule Avas one of the founders of structure chemistry, and the first to point cut the tetratomicity of carbon, and 

 the above work ' served to develop the ' typical' view, and (in its second volume) strengthened his own assumption as to 

 the mode in which atoms are combined with one another.' Prof. E. v. Meyer. 



2254 KEMPE (Alfred Bray, F.R.S.) How to DRAW a STRAIGHT LINE : a Lecture on LINKAGES, 

 with 34 woodcuts, post Svo. cl. (scarce), 5s 1877 



The discovery of, drawing straight lines by means of the link-motion was discovered by PEAUCELLIER, and is here 

 much enlarged by the author. The above is the fullest work on the subject. 



2255 KEMPE (Harry Robert, G.P.O.) HANDBOOK of ELECTRICAL TESTING ; third Ed., with folding 

 table and 135 woodcuts, cr. 8vo. cl., 4s (p. 12s Qd) 1884 



2256 KENNEDY (Sir Alexander Blackie William, F.R.S.) The MECHANICS of MACHINERY, with 

 numerous illustrations, thick post Svo. cl., 5s (p. 12* Qd) 1886 



One of the best English textbooks on the subject. 



2257 KENNEDY (Bankin) The MODERN MACHINE SHOP : its Tools, Practice, and Design, Vol. I, 

 with 8 plates, and 225 woodcuts, 4 to. cl., Qs (p. 9s nett) 1907 



' The first volume is intended to give a survey of the machinery, processes, and materials employed in the first stages of 

 production in metal-working machine shops, showing the modes of preparation of the rough forms of materials, previous 

 to their entry to the shop for accurate finishing and fitting.' Preface. 



2258 KENNELLY (A. E.), and H. D. WILKINSON : PRACTICAL NOTES for ELECTRICAL 

 STUDENTS : Vol. I : LAWS, UNITS, and SIMPLE MEASURING INSTRUMENTS, illustrated, 8vo. cl., 

 3s (p. Qs Qd) 1890 



2259 KEPLER (Johann) OPERA OMNIA, edidit [et Notas adjecit] CHRISTIANUS FRISCH ; with 

 portrait, 3 plates, fs. letter, and numerous diagrams, 8 vols. roy. Svo. in 9, cl. (FRESH SET), 2. 10-s 

 (p. M.I 14. unbound) Frankofurti a.M., 1858-71 



The only complete edition of the author's works ever printed. 



22GO - ASTRONOMIA NOVA AlTlOAOrHTOv, sen Physica Ccelestis, tradita Commentariis de 

 MOTIBUS STELLJE MARTis, ex observationibus TYCHONIS BRAKE, plurium annorum pertinaci 

 studio elaborata Pragae ; with folding table, and numerous diagrams, folio, old calf (EXCESSIVELY 

 RARE), 7. 7s [Pragce], 1609 



2261 - ANOTHER COPY, hf. bound (title and folding table mounted, a number of II. guarded or 

 mended, and some defective, and verses to Tycho Brake torn in pieces, and the paper brittle through- 

 out, but the text itself in good condition) ; a very cheap copy, 1. 10* 



ORIGINAL EDITION of this important work, announcing the first two of Kepler's 'three laws': (1.) The orbit of the 

 planet Mars is an ellipse, of which the sun is in one focus. (2.) In describing its orbit, the radius vector of the planet 

 traverses equal areas in equal times. 



2282 - CHILIAS LOGARITHMORUM ad totidem NUMEROS ROTUNDOS, prsemissa Demonstratione 

 Legitima Ortus Logarithmorum eorumque Usus, quibus Nova traditur Arithrnetica, sen Com- 

 pendium, quo post Numerorunii Notitiam nullum nee admirabilius, nee utilius solvendi pleraque 

 Problemata Calculatoria ... in Numeris prolixis, citra Labores molestissimos, editio princeps; 

 with diagrams, and folding table, sm. 4to. sewn (VERY SOUND AND TALL COPY) ; RARE, 1. 1* 



Marpurgi, 1624 



2233 - SUPPLEMENTUM CniLiADis LOGARITHMORUM, continens Prsecepta de eorum Usu, editio 

 princeps, sm. 4to. sewn (slightly browned as usual, otherwise a sound and very tall copy), 12* 



ibidem, 1625 



Based on Napier's logarithms but differing in having the radius (against Napier's arc of the quadrant) divided into equal 

 parts. The two works are important as having introduced the use of logarithms on the continent. 



' Kepler's table is more convenient than Napier's as a table of the logarithms of common numbers.' Charles Ilutton, F.R.S. 



22G4 - -De COMETIS Libelli III: I. ASTRONOMICUS, Theoremata continens de Motu Cometarum, 

 ubi Demonstratio Apparentiarum et Altitudinis Cometarum qui Annis 1607 et 1618 conspecti sunt, 

 nova et irapd$o%oc : II. PiiYSicus, continens Physiologiam Cometarum novam et nrtpddoZov. III. 

 ASTROLOGICUS, de Significationibus Cometarum Annorum 1607 et 1618 ; with 2 folding plates and 

 folding table, sm. 4to. sewn (VERY SOUND AND TALL COPY) ; RARE, 1. Is Aug. Vindel., 1619 



'The first approach to anything resembling a rational explanation of the tails of Comets is unquestionably due to 

 Kepler.' Pro/. R. Grant. The work also contains the second observation of Halley's Comet, and propounds the erroneous 

 theory that comets move in a straight line. 



2265 DIOPTRICE, sen Demonstratio eorum quse visui et visibilibus propter Conspicilla npn ita 

 pridem inventa accidunt. Prsemissce EPISTOL.E GALILEI de iis, item Examen prtefationis Jo. 

 PEN.E Galli in Optica Euclidis, de usu Optices in philosophia, editio princeps ; with woodcuts, 

 and numerous diagrams, cr. 4to. new hf. calf gilt (FINE AND TALL COPY) ; VERY RARE, 2. 5s 



ibidem, 1611 



2266 - ANOTHER EDITION, with woodcuts and diagrams, sm. Svo. old panelled calf (rebacked), 

 8s Qd Londini, Jac. Flesher, 1653 



The first edition printed in England. 



This is next to his 'Astronomia Nova" and 'Harmonices Mundi' Kepler's most important work, containing the first 

 account of his INVENTION of the ASTRONOMICAL TELESCOPE, consisting of two convex lenses, as opposed to Galileo's telescope 

 of one concave and one convex lens. 



' L'auteur eipploie le premier la regie approximative de la proportionnalite de Tangle de refraction a 1 'angle d' incidence 

 pour etudier les proprietes des lentilles plano-spheriques, et il donne de3 formules, encore usiteea aujourd'hui pour calculer 

 les distances des foyers de semblables lentilles '.Biogr. Gen. 



