418 9ENRY SOTHERAN & CO., 140, STRAND, W.C, AND 43, PICCADILLY, W. 



THE RARE FIRST EDITION : 



8207 GALILEI (Galileo) Dialogo dove ne i congress! di quattro giornate si discorre sopra i due 

 Massimi Sistemi de Mondo Tolemaico, e Copernicano ; proponendo indeterminatamente le 

 ragioni Filosoliche, e Natural! tanto per I'una, qiianto per I'altra parte ; with engraved front, 

 by S. Delia Bella, representing Aristotle^ Ptolemy, and Copernicus, woodcuts, and numerous 

 diagrams, 4to. old Italian vellum {a number of II. browned as usual, but a SOUND AND very large 

 copy) ; VERY RARE, £5. 55 Fiorenza, G. B. Landini, 1632 



8208 Another Copy, contemporary limp vellum (back of binding slightly damaged, and 1 I. 



defective, otherwise a FINE AND VERY LARGE COPY), £4. 10s 



8209 Another Copy, boards, wholly uncut {front, wanting, somewhat browned as usual, 



but a VERY SOUND COPY), £3. 13* 6d 



8210 The Same {also wanting the frontispiece), old Italian vellum ; or, old hf russia {both 



slightly browned, but very SOUND COPIES), £3. 3s 



First Edition of this epoch-making work, a masterly defence of the Copernican system, but which led to its author's 

 imprisonment, and— as has been stated— his being put to the torture. 



The work having been rigidly suppressed, not only for its ' heretical ' views, but also for having offended Pope 

 Urban VIII.'s vanity, who believed himself satirised as the dull interpreter of the Aristotelian system, the first edition has 

 become excessively rare. 



8211 Seconda Impressione, accresciuta d! una Lettera dello stesso, non p!u stampata, e d! 



varj Trattati di piii Autori [per cura di Cellenio Z acclori] ; with vignette and numerous diagrams, 

 4to. old calf, rebacked, 10s 6c? ibidem, 1710 



The second separate edition of the ' Dialogo ', having several letters, including that to the Duchess of Tuscany, added. 

 ' Raro.' — Eiccardi. 



8212 DiscoRSi e Dimostrazioni Matematiche, intorno a Due Nuove Scienze attenenti alia 



Mecanica & i MoviMENTi LocALi, con una Appendice del centre di gravitk d' alcuni Solid!, 

 prima edizione ; with numerous fine woodcuts and diagrams, sm. 4to. old calf, rebacked {small 

 blank portion cut off title), with auto. ' W. Milton, 1795 ' on title (very rare), £3. Zs 



Leida, appresso gli Elsevirii, 1638 

 First Edition of one of the author's most important works, which did as much to lay the foundation of dynamics as 

 Stevinus's Beghinselen did that of statics (v. no. 4585, aiite), and containing the first law of motion, his laws of falling 

 bodies (the result of experiments made from the Leaning Tower of Pisa between 1602 and 1604), demonstrating the 

 parabolic curves of projectiles (hitherto believed to move in a straight line and suddenly fall vertically to the ground), the 

 laws of cohesion, and of the pendulum, a correct definition oi unoinentum, etc. etc. etc. 



8213 Mathematical Discourses concerning Two New Sciences relating to Mechanicks and 



Local Motion, in Four Dialogues. I. Of the Resistance of Solids against Fraction. II. Of the 

 Cause of their Coherence. III. Of Local Motion, viz. Equable, and naturally Accelerate. IV". Of 

 Violent Motion, or of Proiects ; with Appendix concerning the Center of Gravity of Solid Bodies, 

 done into English from the Italian by Thomas Weston, and now published by John Weston, 

 with numerous woodcuts and diagrams, 4to. hf brown calf neat, cl. sides (FINE AND large COPY) ; 

 VERY RARE, £2. lOs J. Hooke, 1730 



The very rare English version of the Discorsi e Dimostrazioni matematiche, together with the ' Systeme of the World, 

 Inglished by Thomas Salusbury,' the only two of Galileo's works ever translated into English. 



8214 — DivisiONE della Linea : delle Operazione del Quadrante ; a closely and neatly- 

 written Manuscript on 42 pages of ivriting paper, with diagrams, folio, hf calf, £6. 6s Soec. XVII. 

 This valuable manuscript of one of Galileo's most important works is in a hand contemporary with the author, and is 

 illustrated with many fine diagrams. It was brought from Italy by Lord Guilford, and formed part of the great MS. 

 collection of Sir Thomas Phillipps, f.s.a. 



8215 Istoria e Dimostrazioni intorno alle Macchie Solari e loro Accidenti, comprese in Tre 



Lettere scritte a Marco Velseri, Linceo [e pubblicate da Angelo de FiL.iis] , prima edizione ; 

 with finely engraved portrait [by Villamoena] , numerous engravings on copper, and diagrams, cr. 

 4to. hf. red morocco neat, uncut, t. e. g. (fine COPY) ; very rare, £3. 3s 



Roma, Giacomo Mascardi, 1613 



8216 Another Copy, contemporary white vellum {title slightly mended, but a very sound and 



LARGE COPY), with autos. ' ex libris Aloysii de Angelis' and ' Joh. Howlij, A. 1695', also small 

 bookplate 'P. M. de Angelij' on title, and some old MS. notes on margin, £2. 17s Qd 



Containing Galileo's discovery of sunspots— the priority of which is, however, claimed for Jan Fabricius— but more 

 important still for the discovery, based on his observations, that the sun turns round its axis. For the first time he 

 avowed himself in the work a follower of Copernicus, which brought him under the suspicion of the Roman Curia, and 

 ended with his imprisonment after the publication of the Dialogo. 



8217 Altra Edizione, s'aggiungono nel Fine le Lettere, e Disquisizioni del finto Apelle ; with 



finely engraved portrait, engravings on copper {including additional ones), and diagrams, sm. 

 4to. old hf. vellum {a few slight water-stains, but a very SOUND COPY), £5. 5* 



ibidem, apud eundem, 1613 



This edition is exceedingly rare, and quite unknown to bibliographers. Even in Riccardi's copious list of Galileo's works 

 only the first edition is mentioned. It differs considerably from the latter by having an appendix of 56 11., with additional 

 engravings, entitled : ' De Maculis Solaribus III Epistolfe. De iisdem et Stellis circa Jovem errantibus, Disquisitio ad 

 Marcum Velserum . . . Apellis post Tabulam latentis. Tabula ipsa aliarumque observationum delineationibus suo loco 

 expositis.' 



8218 Delle Linee Arithmetiche e Geometriche del Quadramte per Misurar con la Vista ; 



a neatly written Manuscript on 66 pages, with numerous p^ty illustrations and diagrams, 

 foho, old limp vellum, £10. 105 ' Sa^c. XVII. 



This valuable and finely written manuscript from the well-known collection of Sir Thomas Phillipps, f.s.a., is 

 contemporary with the author, and contains many fine diagrams. It differs considerably from No. 8214, and contains the 

 following pieces which are not in that volume : Operatione della Bussola : Como possiamo prendere in disegno & misurare 

 una citta fuori di quella alia quale non ci possiamo approssimare per 300 pertiche : Come possiamo formar in campagna 

 qualsivoglia figura rettilinea : Dichiaratione della parte di sotto dello strumento, ec. : Come con le medisime linee 

 possiamo dividere la circonferenza di un cerchio sin in XVI parti : Come si assetti di giorno i pezzi d'artegliaria per 

 tirau-h la notte : Operatione della squadra di Bombardieri ; and many other pieces. 

 Ihe latter.part of the work is illustrated with drawings of artillery, etc. 



