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- 

 Sinith, pr., F.E.S., 5.9 (p. 12^ 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 Sj^laies, Svo. (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, Svo. (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. sewn, with 

 author's inscr., 4/id auto, of F. J. Jervis-Smith, pr., F.R.S. , 5s 1887 



10093 KENNEDY (Rankin) Electrical Installations of Electrical Light, Power, Traction, 

 and Industrial Electrical Machinery, with hundreds of illustrations {including many 

 jylates), 5 vols. sq. roy. 8vo. cl., 17s 6d (p. £1. 17* 6d 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 KENWARD (James, lighthouse engineer) Ship Lights and Collisions, 8vo. (pp. 16), seicn, 

 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. Svo. in 9, hf. purple calf extra, cl. 

 sides, t. e. g. (fine set), with bookplate of Dr. Emil Reich, £3. 15* (p. M. 114 sewn) 



Franco furti ad Mcenum, 1858-71 

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



10097 DiOPTRlCE, seu Demonstratio eorum qua? visui et visibilibus propter Conspicilla non ita 



pridem inventa accidunt. Pmeraissfe Epistol^ Galtl^i de iis, item Examen Prcefationis Jo. 

 Pen^ Galli in Optica Euclidis, de Usu Optices in Philosophia, editio prJnceps ; with numerous 

 diagrams, Augustm Vindelicorum, 1611 : Ad ViTELLiONEM Paralipomkna, quibus Astronoml*: 

 Pars Optica traditur; potissimum de Artiliciosa Observatione et /Estimatione Diametrorum 

 Deliquiorumque ; Solis et Luna% cum Exemplis Insignium Eclipsium, etc. etc., Tractatum 

 LucuLENTUM de MoDO VisiONis, et Humdrum Oculi Usu, contra Opticos et Anatomicoa, 

 editio princeps ; with diagrams and folding tables, Francofarti, '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 iniportr.nt than the Dioptrice, contains the Jirst correct physiological explanation 

 of the defects of sight, with a theory of vision, the first suggestion of the undnlatory 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 u.se, etc. etc. 



'In a short chapter on conies inserted in his ParaUpotnena, published in 1()04, 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 focus 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.'— IF. W. R. Ball. 



10098 Dioptrice : seu Demonstratio eorum quve visui et visibilibus propter Conspicilla non ita 



prideni inventa accidunt. Prsemissfe Epistol.e Galilei de iis, qu.ne post Editlonem Nuncii 

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

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

 sm. Svo. sewn, 8s M 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 Tangle de refiaction a Tangle d'incidence 

 pour etudier les proprietes deslentilh;s piano spheriques, etildonnedesformules, encore usiteesarjourd'hni pour calculer, 

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



10099 — Epitome Astronomic Copernicanc, usitata Forma Qu?estionum et Responsionum 



conscripta ; in VII Libros digesta, quorum III hi priores sunt de Doctrina SpH/ERICA, editio 

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

 and partly water-stained) ; RARE, 155 Lentiis ad Danubifnn, 1618 



The first edition contains only the first 3 Books, It was the first work dividing the science into sphcrieal and 

 theoretical astronomy. 



10100 Harmonices Mundi Libri V, quorum T. Geometricus, II. Architectonicus, III. Harmoni- 



cus, IV. Metaphysicus, Psychologicus et Astrologicus, V. Astronomicuset Metaphysicns, Appendix 

 habet Comparationera huius Operis cum Harmonices Cl. Ptolem.*:i Libro III. cumque Roberti 

 de Fluctirus [Robert Fludd, m.d.] Speculationibus Harmonicis. etc., editio princeps ; with 

 plates, woodcuts, and diagrams, sm. folio, cordemporary vellum {back of binding slightly damaged 

 and browned as usual, otherwise a SOUND and tall copy) ; very rare, £3. lO* 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'— IF. W. It. Ball), containing for the first time his 

 I 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. 



