504 HENRY SOTHERAN & CO., 140, STRAND, W.C., AND 43, PICCADILLY, W. 



10089 KENNEDY (Sir Alexander Blackie William, F.R.S.) The MECHANICS of MACHINERY, 

 with numerous illustrations, thick post 8vo. cl., with author's inscr., and auto, of F. J, Jervis- 

 Smith, pr., F.R.S. , 5.5 (p. 12s Qd) 1886 



One of the best English textbooks on the subject. 



10090 RIVETED JOINTS (Report on Experiments on Double-Riveted LAP and BUTT JOINTS, 



Series XI-XIII, and Abstract of Results of Experiments on Riveted Joints, with their Application 

 to Practical Work, with 3 plates, 8vo. (pp. 94), sewn, 4s 1885 



10091 RESULTS of EXPERIMENTS on RIVETED JOINTS made for the Institution of Mechanical 



Engineers [with Appendixes by R. H. TWEDDELL, etc.], 10 plates, 8vo. (pp. 164), sewn, Qs 1881 



Added is : ' On Riveting, with special Reference to Ship-Work ', by BARON CLAUZEL (pp. 37). 



10092 The USE and EQUIPMENT of ENGINEERING LABORATORIES, with Abstract of the 



Discussion, edited by JAMES FORREST, with a folding plate and 40 woodcuts, 8vo. s.ewn, with 

 author's inscr., and auto, of F. J. Jervis-Smith, pr., F.R.S., 5s 1887 



10093 KENNED Y (Rankin) ELECTRICAL INSTALLATIONS of ELECTRICAL LIGHT, POWER, TRACTION, 

 and INDUSTRIAL ELECTRICAL MACHINERY, with hundreds of illustrations (includinq many 

 plates], 5 voL?. sq. roy. 8vo. cl., Us 6d (p. 1. 17s Qd nett) [c. 1910] 



10094 MODERN ENGINES and POWER GENERATORS : a Practical Work on Prime Movers and 

 the Transmission of Power : Steam, Electric, Water, and Hot Air, with many hundred plates, 

 diagrams, and illustrations, 6 vols. cr. 4to. cl., 1. 5s (p. 2. 14s nett) [c. 1910] 



10095 KENWAB.D (James, lighthouse engineer) SHIP LIGHTS and COLLISIONS, 8vo. (pp. 16), sewn, 

 with auto, letter from the author, 2s Birmingham, 1893 



10096 KEPLER (Johann) OPERA OMNIA, edidit [Notasque adjecit] CHRISTIANUS FRISCH; with 

 portrait, 3 plates, fs. letter, and numerous diagrams, 8 vols. roy. 8vo. in 9, hf. purple calf extra, cl. 

 sides, t. e. g. (FINE SET), with bookplate of DR. EMIL REICH, 3. 15s (p. M. 114 sewn) 



Franco/ urti ad Mocnum, 1858-71 

 The only complete edition of Kepler's works ever published. 



10097 DIOPTRICE, seu Demonstratio eorum qua? visui et visibilibus propter Conspicilla npn ita 



pridem inventa accidunt. Praemissse EPISTOL^ GALILEI de iis, item Examen Prsefationis Jo. 

 PEN^E Galli in Optica Euclidis, de Usu Optices in Philosophia, editio princeps ; with numerous 

 diagrams, Augusts Vindelicorum, 1611 : Ad ViTELLIONEM PARALIPOMENA, quibus ASTRONOMIC: 

 PARS OPTICA traditur; potissimiim de Artificiosa Observatione et /Estimatione Diametrorum 

 Deliquiorurnque ; Solis et Luna?, cum Exemplis Insignium Eclipsium, etc. etc., TRACTATUM 

 LUCULENTUM de Mopo VISIONIS, et HUMORUM OCULI Usu, contra Opticos et Anatomicos, 

 editio princeps; with diagrams and folding tables. Franco/ urti, '04 2 vols. sm. 4to. in 1, 

 LARGE AND SOUND COPIES in old white vellum (but the second work browned as usual] ; VERY 

 RARE, 3. 155 1611-04 



The second work, which is hardly less important than the Dioptrice, contains the first correct physiological explanation 

 of the defects of sight, with a theory of vision, the first suggestion of the undulatory theory of light, an approximately 

 correct formula of refraction (pointing out the relation between the sine of incident and refracted rays), the first announce- 

 ment of one of the principal axioms of photometry, his method of calculating eclipses, still in use, etc. etc. 



'In a short chapter on conies inserted in his Paralipomena, published in 1604, he lays down what has been called the 

 principle of continuity, and gives as an example the statement that a parabola is at once the limiting case of an ellipse 

 and of a hyperbola ; he illustrates the same doctrine by reference to the foci of conies (the word focn* was introduced by 

 him) ; and he also explains that parallel lines should be regarded as meeting at infinity. He introduced the use of the 

 eccentric angle in discussing properties of the ellipse.' W. W. R. Ball. 



10098 DIOPTRICE : seu Demonstratio eorum qua? visui et visibilibus propter Conspicilla non ita 



pridem inventa accidunt. Prsemissae EPISTOL^E GALILEI de iis, qure post Editionem Nuncii 

 Siderei, Ope Perspicilli. nova et admiranda in Coelo deprehensa sunt ; item Examen Prsefationis 

 Jo. PEN^E Galli in Optica Euclidis, de usu Optices in Philosophia ; with woodcuts and diagrams, 

 sm. 8vo. sewn, 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, and contains 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 ; and also the first attempt at giving a theory of the telescope. 



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

 pour etudier les proprietes des lentilles piano sphenques, etil donne desformules, encore usitees arjourd'hui pour calculer, 

 les distances des foyers de semblables lentilles '.Eiogr, Gen. 



10099 EPITOME ASTRONOMIC COPERNICAN^E, usitata Forma Qurestionum et Responsionum 



conscripta ; in VII Libros cligesta, quorum III hi priores sunt de DOCTRINA SPH.BRTCA, editio 

 princeps ; with woodcuts and diagrams, 12mo. old boards (corner of title and first I. defective, 

 and partly water-stained) ; RARE, 15s Lentil's ad Danubi'nn, 1618 



The first edition contains only the first 3 Books. It was the first work dividing the sctence into spherical and 

 theoretical astronomy. 



10100 - HARMONICES MUNDI Libri V, quorum I. Geometricus, II. Architectonicus, III. Harmoni- 

 cus, IV. Metaphysicus, Psychologies et Astrologicus, V. Astronomicuset Metaphysicus, Appendix 

 habet Comparationem huius Operis cum Harmonices CL. PTOLEM^I Libro III. cumque ROBERTI 

 DE FLUCTIBUS [ROBERT FLUDD, M.D.] Speculationibus Harmonicis, etc., editio prinreps ; with 

 plates, woodcuts, and diagrams, sm. folio, contemporary vellum (back of binding slightly damaged 

 'and browned as usual, otherwise a SOUND AND TALL COPY) ; VERY RARE, 3. 105 ibidem, 1619 



10101 ANOTHER COPY, old limp vellum (blank corner of title and last I. defective, and corner 



of a number of II. water -stained, otherwise an unusually clean and tall copy], 3. 3s 



ORIGINAL EDITION of Kepler's second great work (' his chief work' W. W. R. Hall), containing for the first time his 

 'third law' : The square of a planet's periodic time is proportional to the cube of its mean distance from the sun. As 

 is well known, his three laws formed the groundwork of Newton's discoveries, and are the starting point of modern 

 astronomy. 



It is dedicated to James I. The passage ' fidei defensor inter Chiisti fideles' is inked in the second copy. 



