81. CLAVIUS Translate this page clavius, christopher, (Al.1538-It.1612), foi o astrônomo jesuíta que ajudou opapa Gregory XIII a introduzir o que é chamado agora o calendário gregoriano. http://www.geocities.com/cobra_pages/fm-clavius.html

82. Enciclopedia Católica Translate this page clavius, christopher Matemático y astrónomo (1538-1612) clavius, Claudius Cartógrafo danés (nació en 1388) Clavos Santos Clayton, James (Santiago) http://www.enciclopediacatolica.com/ci.htm

Search this site powered by FreeFind Cip-Com Cab-Car Cas-Cin Con-Cyz Cipriani Thorne, Juan Luis, Cardenal ... Cipriano de Cartago, San Cipriano de Toulon, San Cipriano y Justina, Santos Circesium Cirene Doctor de la Iglesia del siglo V Cirilo de Constantinopla, San Cirilo y Metodio, Santos Cirio Pascual Cirio Pascual Cirios Cirios del Altar Ciro y Juan, Santos Cisalpino, Club Cisamus Sede titular de Creta Cisma Cisma de Occidente Cisma de Oriente Cisne, Orden del ... Cistercienses, Hermanas Citharizum Ciudad Real Ciudad Rodrigo Cius, Sede titular de Civil, Alianza Civil, Autoridad Civil, Ley (Influencia de la Iglesia en) Civil, Matrimonio Clancy, Edward Bede, Cardenal Clara de Montefalco, Santa Clara de Rimini, Beata Claraval, Bernardo de Clarisas Pobres Clark, William (Guillermo) Claude Dablon Claudia Claudianus Mamertus Claudiopolis Claudiopolis Sede titular en Asia Menor Claudius Acquaviva Claustro Claver, San Pedro Clavigero, Francisco Saverio Jesuita mexicano (1731-1787) Clavius, Christopher Clavius, Claudius

83. Re: Why Isn't There A Leap Year Every 100 Years The Jesuit astronomer christopher clavius helped Pope Gregory XIII to introducewhat is now called the Gregorian calendar. The Julian leapyear rule created http://128.252.223.112/posts/archives/jan99/916424545.Ot.r.html

MadSci Network : Other Re: Why isn't there a leap year every 100 years Date: Fri Jan 15 12:10:36 1999 Posted By: Tom Cull, Staff, Clinical Sciences MR Division, Picker International Area of science: Other ID: 915920809.Ot Message: Hi Kate, Like many things that are passed as lore, there are a couple details about leap year that are not common knowledge. I found a couple online sources. Here is information on leap that I quote from http://www.usinfo.com/staff/rheil/LEAPYEAR.HTM The year is defined as being the interval between two successive passages of the Sun through the vernal equinox. Of course, what is really occurring is that the Earth is going around the Sun but it is easier to understand what is happening by considering the apparent motion of the Sun in the sky. Produced by the Information Services Department of the Royal Greenwich Observatory. More about Leap Year The Jesuit astronomer Christopher Clavius helped Pope Gregory XIII to introduce what is now called the Gregorian calendar. The Julian leap-year rule created 3 leap years too many in every period of 385 years. As a result, the actual occurrence of the equinoxes and solstices slowly moved away from their calendar dates. The date of the spring equinox determines the date of Easter so the church began to press for reform.

84. Book Review The American Historical Review, 109.1 The This was the view and program of christopher clavius, the founder of a mathematicalacademy at the Roman College for Jesuits with an aptitude for http://www.historycooperative.org/journals/ahr/109.1/br_117.html

You have not been recognized as a subscriber to the AHR online. About 588 words from this article are provided below; about 974 words remain. If you are a individual member of the American Historical Association, you may: login here if you have already registered for online access. register your subscription Set up your online account for the first time. AHA members can go to the AHA individual membership section to locate their member numbers. If you are not a member of the American Historical Association, you can: Join the AHA and receive many member benefits including print and electronic issues of the American Historical Review. Purchase a research pass to gain two hour access to the entire History Cooperative web site. You will have full access to current issues of the American Historical Review (104.3-present). Note: the Research Pass does not provide access to JSTOR's holdings of the American Historical Review. Instititutions can: Subscribe to this journal and receive print and electronic issues. Activate your existing subscription so that we recognize your IP number ranges.

85. UB Karlsruhe on Mathematics Written by christopher clavius, SJ / clavius, christopher 5.The Jesuit Ratio Studiorum, christopher clavius, and the Study of http://www.ubka.uni-karlsruhe.de/hylib-bin/suche.cgi?opacdb=ZID02&rn=17844968&Ba

86. Nat' Academies Press, Eclipse: The Celestial Phenomenon That Changed The Course 299, 300 Churchill, Sir Winston, 105 Civil War, 293 Clarke, John, 179 Claudius,emperor of Rome, 68, 359 clavius, christopher, 186 Clementine satellite, http://www.nap.edu/books/030907438X/html/445.html

Read more than 3,000 books online FREE! More than 900 PDFs now available for sale HOME ABOUT NAP CONTACT NAP HELP ... ORDERING INFO Items in cart [0] TRY OUR SPECIAL DISCOVERY ENGINE Questions? Call 888-624-8373 Eclipse: The Celestial Phenomenon That Changed the Course of History (2001) Joseph Henry Press ( JHP Find More Like This Book Research ... Dashboard NEW! BUY This Book CHAPTER SELECTOR: Openbook Linked Table of Contents Front Matter, pp. i-xviii 1. From the Depths of Time: The Earliest Recorded Eclipses, pp. 1-36 2. The Heavenly Cycles, pp. 37-67 3. Making Predictions, pp. 68-104 4. A Warp in Space, pp. 105-124 5. The Turbulent Sun, pp. 125-146 6. Ancient Eclipses and the Length of the Day, pp. 147-160 7. Eclipses and the Size of the Sun, pp. 161-173 8. The American Eclipses of 1780 and 1806, pp. 174-195 9. The Rocky Mountain Eclipse of 1878, pp. 196-212 10. The Great New York City Winter Eclipse, pp. 213-228 11. Nantucket, the Astronomically Blessed, pp. 229-244 12. Eclipses of the Third Kind, pp. 245-272 13. ...and a Fourth, pp. 273-309

87. Nat' Academies Press, Eclipse: The Celestial Phenomenon That Changed The Course clavius, christopher, 186. Clementine satellite, 134. Cleopatra, 86, 367. Clock(s).atomic, 151–152. Cook, James and, 286, 289, 290 http://www.nap.edu/books/030907438X/html/448.html

Read more than 3,000 books online FREE! More than 900 PDFs now available for sale HOME ABOUT NAP CONTACT NAP HELP ... ORDERING INFO Items in cart [0] TRY OUR SPECIAL DISCOVERY ENGINE Questions? Call 888-624-8373 Eclipse: The Celestial Phenomenon That Changed the Course of History (2001) Joseph Henry Press ( JHP Find More Like This Book Research ... Dashboard NEW! BUY This Book CHAPTER SELECTOR: Openbook Linked Table of Contents Front Matter, pp. i-xviii 1. From the Depths of Time: The Earliest Recorded Eclipses, pp. 1-36 2. The Heavenly Cycles, pp. 37-67 3. Making Predictions, pp. 68-104 4. A Warp in Space, pp. 105-124 5. The Turbulent Sun, pp. 125-146 6. Ancient Eclipses and the Length of the Day, pp. 147-160 7. Eclipses and the Size of the Sun, pp. 161-173 8. The American Eclipses of 1780 and 1806, pp. 174-195 9. The Rocky Mountain Eclipse of 1878, pp. 196-212 10. The Great New York City Winter Eclipse, pp. 213-228 11. Nantucket, the Astronomically Blessed, pp. 229-244 12. Eclipses of the Third Kind, pp. 245-272 13. ...and a Fourth, pp. 273-309

88. PSIgate - Physical Sciences Information Gateway Search/Browse Results christopher clavius Born 25 March 1538 in Bamberg (now in Germany) Died 2 Feb1612 in Rome (now in Italy) Click the picture above to see two larger http://www.psigate.ac.uk/roads/cgi-bin/search_webcatalogue.pl?term1=Bam&limit=0

89. History Of Astronomy: Persons (C) clavius Klau, Christoph christopher (15381612). Biography, relation toGalileo and references Biographical data and references Short biography and http://www.astro.uni-bonn.de/~pbrosche/persons/pers_c.html

History of Astronomy Persons History of Astronomy: Persons (C) Deutsche Fassung Cacciatore, Gaetano (1814-1889) Short biography and references (in Italian) Short biography, references, links (H. Frommert, C. Kronberg) Short biography and references (in Italian) Caccini, Tommaso (1574-1648) Biography and relation to Galileo Caesar, Julius (100? BC - 44 BC) Biography and references (Encycl. Brit.) Cahill, Daniel William (1796-1864) Short biography and references From the Catholic Encyclopedia, 1913 Cajori, Florian (1859-1930) Short biography and references (MacTutor Hist. Math.) Short biography (Encycl. Brit.) Crater Cajori (lunar feature) Callippus of Cyzicus (c. 370 BC - c. 310 BC) Short biography and references (MacTutor Hist. Math.) Very short biography (Eric Weisstein's Treasure Trove) Calvin, John (1509-1564) Biography and references (Encycl. Brit.) Short biography From the Catholic Encyclopedia, 1913 Calvin and the Astronomical Revolution , by Matthew F. Dowd Campanella, Tommaso (1568-1639[1659?])

90. Gregorijanski Kalendar 3 christopher Clau (clavius) je bio veoma uvažena licnost u doba Galileo Galilea.Roden je u Bavarskoj (Nemacka) 1538. a umro u Rimu 2. feb.1612. http://www.astronomija.co.yu/kalendar/knjiga/kalendari/gregorijanski.htm

am@astronomija.co.yu Kalendar kroz istoriju O knjizi Sadržaj i spisak poglavlja objavljenih u AM Kalendar Reè dve o kalendaru Ovaj mesec Neke zanimljivosrti o aktuelnom mesecu Sadržaj AM Drago I. Dragoviæ dragovic@net.yu Naru èite ovu knjigu I z knjige Kalendar kroz istoriju GREGORIJANSKI KALENDAR Videli smo da je srednja julijanska godina duža od prirodne (tropske) za ~ 11 minuta i 14 sekundi . Pošto se ta razlika stalno akumulira, ona za približno 128 godina iznosi 1 dan. Za 400 godina ta razlika naraste na 3 dana 2 sata 52 minuta i 48 sekundi, a za 800 godina naraste na 6 dana 5 sati 45 minuta i 36 sekundi . Da zvanièni kalendar ne bi išao (žurio) ispred prirodnog, bilo je potrebno izvršiti njegovu prepravku. Rimski papa Gregorius (Grgur) XIII je 24. februara 1582. godine obznanio reformu do tada postojeæeg, julijanskog kalendara, predloženu od strane nemaèkog jezuite i astronoma Christophera Claviusa ,a uz pomoæ napuljskog astronoma i fizièara Aloysiusa Liliusa . Papina bula (ili dekret) koji je sadržavao tu reformu nazvana je Inter Gravissimas , po prve dve reèi u tom tekstu. Te reèi na latinskom jeziku znaèe "

91. Nuestra Comunidad Página 7 Translate this page christopher clavius (1538-1612). Dr. Ernesto Meneses* La influencia de claviusno se limitó a las escuelas de Europa sino que se extendió hasta China http://www.uia.mx/actividades/nuestracom/00/nc90/7.html

16 de octubre de 2000 Christopher Clavius Dr. Ernesto Meneses* C Humanismo y Humanismo Cristiano, P ara los que no se acuerdan de nuestros dos avisos anteriores: en el website www.uia.mx/humanismocristiano encuentran los planteamientos y el programa para el Coloquio sobre el Humanismo que tiene lugar en la UIA del 15 al 17 de noviembre de 2000. Dra. Barbara Andrade Informes: 5950 4015 Portada

92. Easter after the the Jesuit mathematician and astronomer christopher clavius (15371612), Later, the largest crater visible on the Moon was named clavius. http://www.friesian.com/easter.htm

The Determination of Easter, On both the Julian and the Gregorian Calendars In 2005, on the Gregorian calendar (Western Churches), Septuagesima Sunday falls on January 23rd, Ash Wednesday on February 9th, Easter on March 27th, and Pentecost on May 15th. On the Julian calendar (Eastern Churches), Septuagesima Sunday falls on February 27th, Ash Wednesday on March 16th, Easter on May 1st, and Pentecost on June 19th. This is an unusally large separation between Western and Eastern Easter, five weeks. Those who may pass on Mardi Gras, on February 8th, as being too cold, might consider observing Julian Mardi Gras instead, on March 15th. Index Introduction Golden Numbers and Dominical Letters Determining Easter, I Epacts ... Other Movable Feasts Introduction Easter is the most important Christian feast. Christmas seems to draw more enthusiasm from most people, and even non-Christians observe many of the traditional Christmas rituals; but few non-Christians pay much attention to Easter (except perhaps for Easter Parades , where everyone has an excuse to wear strange hats). For the

93. ESSAYS ON SCIENCE AND SOCIETY: Science And Religion: Lessons From History? -- Br From divergent points of view, Kepler, Galileo, and the antiCopernican Jesuitastronomer christopher clavius all saw this elevationnot relegationas the http://www.sciencemag.org/cgi/content/full/282/5396/1985

Previous Article Table of Contents Next ... Article Science , Vol 282, Issue 5396, 1985-1986 , 11 December 1998 E-Letters: Submit a response to this article Download to Citation Manager Alert me when: new articles cite this article Search for similar articles in: Science Online Search Medline for articles by: Brooke, J. Search for citing articles in: ISI Web of Science (1) Request permission to use this article This article appears in the following Subject Collections: Essays Science and Policy ADVERTISEMENT What's This... [DOI: 10.1126/science.282.5396.1985] Association Affairs Also see the archival list of the Essays on Science and Society. ESSAYS ON SCIENCE AND SOCIETY: Science and Religion: Lessons from History? JOHN BROOKE John Brooke is professor of the History of Science at Lancaster University. He authored the prize-winning Science and Religion: Some Historical Perspectives (Cambridge University Press, 1991), and, with Geoffrey Cantor, Reconstructing Nature: The Engagement of Science and Religion "

94. Christoph Clavius The Jesuit mathematician and astronomer christopher clavius Clau (15371612).Born in Bamberg in 1537, clavius joined the Jesuit order in 1555, http://web.hao.ucar.edu/public/education/sp/images/clavius.html

Christoph Clavius (1537-1612) The Jesuit mathematician and astronomer Christopher Clavius [Clau] (1537-1612). Born in Bamberg in 1537, Clavius joined the Jesuit order in 1555, and studied at Coimbra. Clavius was one of the major architect of the Gregorian calendar reform of 1582, and remained professor of mathematics at the Jesuit's Collegio Romano until his death on February 6 1612. In 1570 Clavius wrote what was to become one of the most influential textbook on astronomy of its days, in the form of a commentary on the so-called Spheres of Sacrobosco. In the catholic world, this was the textbook for three generations of astronomers, including Galileo , and most particularly for Jesuit astronomers throughout the world. In later editions of his book Clavius pronounced himself relatively favorably on the Copernican system as a mathematical model, but to the end of his life rejected its physical reality. Until Galileo's condemnation in 1633, this was also the official position of the Roman ecclesiastic authorities. Clavius was chief astronomer at the Jesuit's Collegio Romano at the time of Galileo's first telescopic discoveries, and was still quite active despite his advancing age. He pronounced himself favorably concerning the physical reality of most of these telescopic observations. His doing so effectively silenced the first wave of opposition to Galileo. He did not agree with all of Galileo's interpretations however, and in particular remained staunchly opposed to the notion of mountains on the Moon.

95. Galileo Father christopher clavius, Astronomer. Jon Marget. Little Monk. Jason Linkins.First Secretary. Brad CarnesStine. Second Secretary. Richard Dobson http://www.stmarksplayers.org/seasons/19971998/galileo/galileo.htm

Home About the Players Archive Search ... Volunteer The St. Mark's Players 1997-98 Season THE CHARACTERS THE PLAYERS Galileo Galilei Bill Prindle Andrea Sarti, as a boy and as a man Mary Kavalaskas, Chris Tully Mrs. Sarti, Galileo's housekeeper, Andrea's mother Diane Wilshere Ludovico Marsili, a rich young man Shawn Brickerd The Procurator of Padua University, Mr. Priuli Jon Marget Sagredo, Galileo's friend Michael Pemberton Virginia, Galileo's daughter, as a young girl and as a woman Sarah Hoptman, Thea Austen The Doge of Venice Fairfield Butt Mr. Matti, Ironfounder/Industrialist Kevin Sockwell Senators of Venice Alex Bastani Bob Beauchamp Richard Dobson Richard Swift Brad Carnes-Stine Patrick Macrory Senators Wives Mary Yee Diane Wilshere Deanna Spear Citizens of Venice Sarha Brown Anna Kavalaskas Chris Tully Robert Naiman Matthew Vance Lee Rumpf Sherry-Ann Mitchell Artisans of Venice Jason Linkins Thea Austen Phil Sawicki Bentley Bottrell Jim Gaither Cosimo de Meici, Grand Duke of Florence, Age 9 Lee Rumpf Mr. Gaffone, The Philospher, later Rector of teh University of Pisa

96. History Of New Year Celebrations Pope Paul III recruited several astronomers, principally the Jesuit ChristopherClavius (15371612), to come up with a solution. They built upon calendar http://www.twilightbridge.com/hobbies/festivals/newyear/julian.htm

The Julian Calendar and The Georgian Reforms For many European institutions, we can thank the Romans (for good or for bad, though they too had their predecessors in the Greeks, Egyptians and Babylonians). So with the solar calendar currently in widespread use. Originally the Romans numbered years ab urbe condita, that is, "from the founding of the city" (of Rome, where much of the character of the modern world had its beginnings). Had this old calendar remained in use, 1996-01-14 would have been New Year's Day in the year 2749 a.u.c. Following his conquest of Egypt in 48 B.C. Julius Caesar consulted the Alexandrian astronomer Sosigenes about calendar reform (since the a.u.c. calendar then used by the Romans was completely inadequate to the needs of the emerging empire, which Caesar was poised to command, briefly as it turned out). The calendar which Julius Caesar adopted in the year 709 a.u.c. (what we now call 46 B.C.) was identical to the Alexandrian Aristarchus' calendar of 239 B.C., and consisted of a solar year of twelve months and of 365 days with an extra day every fourth year. It is unclear as to where or how Aristarchus arrived at this calendar, but one may speculate that Babylonian science was involved. As we can read in the excellent article, "The Western Calendar and Calendar Reforms" in the Encyclopedia Brittanica, Sosigenes decided that the year known in modern times as 46 B.C. should have two intercalations. The first was the customary intercalation of 23 days following February 23, the second, "to bring the calendar in step with the equinoxes, was achieved by inserting two additional months between the end of November and the beginning of December. This insertion amounted to an addition of 67 days, making a year of no less than 445 days and causing the beginning of March, 45 B.C. in the Roman republican calendar, to fall on what is still called January 1 of the Julian Calendar."

97. Cat-vent_rennes19-oct-04 - Bibliorare - La Recherche Des Livres Rares Et Precieu http://www.bibliorare.com/cat-vent_rennes19-oct-04.htm

Accueil Catalogues ventes et librairies Info du bibliophile Coin du Bibliophilie ... Recherches RESULTATS HOTEL DES VENTES DE RENNES - MARDI 19 OCTOBRE 2004 MANUSCRITS - PHOTOGRAPHIES - BEAUX-ARTS BRETAGNE ENCHERES SCP. LIVINEC - GAUDUCHEAU - JEZEQUEL 32, place des Lices - 35000 RENNES e-mail : art@rennesencherres.com EXPERT Eric SEGUINEAU - 24, Bld. Hennecart - 44500 La Baule. Tel - Fax : (33) 02.40.24.04.62. - e-mail : librairie.seguineau@wanadoo.fr i LIVRES ANCIENS Est : Est : Est : Barbier II-575 b. Est : Est : Est : Est : Rel. post. demi-basane, la page de titre manque. Est : 12 - DOMAT (Me.) - Les Loix Civiles dans leur ordre naturel; le Droit Public et Legum Delectus. P., Delalain 1777, 2 tomes en un fort volume in-folio. Est : Est : Barbier IV-1077 e. Est : Barbier IV-1073 f. Est : 18 - Livre d'Heures - Sancta Missa. Est : Mq. page de titre. Est : Barbier II-725 a. Est : Est : Est : Est : Est : Est : 30 - BERTHEROY Jean - Le Colosse de Rhodes, roman antique. P., Ollendorff 1909, fort in-12. Edition originale, un des 5 ex. num. sur Hollande, seul tirage de luxe. Est : Est : Est : Est : Est : Est : Est : Est : Est : Envoi de l'illustrateur.

98. New Page 1 Pope Paul III recruited several astronomers, principally the Jesuit ChristopherClavius (15371612), to come up with a solution. When Pope Gregory XIII was http://www.mi-card.com/osmart0/newyear.htm

New Year Pavilion Welcome to New Year Pavilion - Start with A New Outfit Talk about New Year In the olden days, the New Year was celebrated at the beginning of Spring when plants are growing and the world is refreshed from the winter. It was Julius Caesar, King of the Roman Empire, who made the calendar revision to suit his empire. The calendar which Julius Caesar adopted in the year 46 B.C. consisted of a solar year of twelve months and of 365 days with an extra day every fourth year. Julius Caesar wanted to start the year on the Spring Equinox or the Winter Solstice, but yielded to the Roman Senate, which traditionally took office on January 1st, the start of the Roman civil calendar year, to adopt January 1st as the start of the year. Subsequently the Julian Calendar became widespread as a result of its use throughout the Roman Empire and later by various Christian churches, which inherited many of the institutions of the Roman world. Although the Julian calendar had been there for over a millennium and a half, a very basic controversy had not been sorted out. The average length of a year in the Julian Calendar is 365.25 days (one additional day being added every four years). This is significantly different from the "real" length of the solar year. This error accumulates so that after about 131 years the calendar is out of sync with the equinoxes and solstices by one day. Thus as the centuries passed the Julian Calendar became increasingly inaccurate with respect to the seasons. This was especially troubling to the Roman Catholic Church because it affected the determination of the date of Easter, which, by the 16th Century, was well on the way to slipping into Summer.

99. LA BIBLIOTHEQUE DU DIX-SEPTIEMISTE http://odalix.univ-bpclermont.fr/Cibp/Bib17/B17bv5.htm

C.E.R.H.A.C. Centre International Blaise Pascal La bibliothèque du dix-septiémiste (mise à jour le 22 juin 2005) DEUXIÈME PARTIE : OUVRAGES CRITIQUES V. Histoire des idées (suite) Généralités Sciences Philosophie Religion ... Auteurs étrangers 10. Auteurs étrangers Cavalieri Bonaventura FAVARO A., B. Cavalieri , Venise, 1915. Clavius Christopher Evidemment, Clavius est jésuite, et il appartient sans conteste au XVI e GIARD Luce (dir.), Les jésuites à la Renaissance. Système éducatif et production du savoir , P.U.F., 1995. KNOBLOCH Eberhard, "Sur la vie et l'œuvre de Christophore Clavius (1538-1621), Revue d'Histoire des Sciences , XLI, 3-4, juillet-décembre 1988, p. 331-356. ROMANO Antonella, , Rome, Ecole Française de Rome, 1999. Galilée BELLONE Enrico, Galilée Pour la science , coll. Les génies de la science , nov. 1999. Synthèse considérablement illustrée, qui peut servir d'introduction. CLAVELIN M., La philosophie naturelle de Galilée , Colin, Paris, 1968. Pour une compréhension approfondie ; mais difficile. DRAKE Stillman

100. LA BIBLIOTHEQUE DU DIX-SEPTIEMISTE http://odalix.univ-bpclermont.fr/Cibp/Bib17/B17-A-II.htm

C.E.R.H.A.C. Centre International Blaise Pascal La bibliothèque du dix-septiémiste (mise à jour le 10 novembre 2003) PREMIÈRE PARTIE : TEXTES ET ÉDITIONS II. Auteurs étrangers Barème : ** Vaut le détour. *** Vaut le voyage. **** Indispensable. Nota bene : certains auteurs étrangers BOYLE Robert Nova experimenta physico-mechanica de vi aeris elastica, et ejusdem effectibus, facta maximam partem in nova machina pneumatica , T. Robinson, Oxoniae, 1661. CAMPANELLA Tommaso Apologia pro Galileo Apologie de Galilée , éd. Michel Pierre Lerner, Les Belles Lettres, Paris, 2001 ; La cité du soleil , traduite et précédée d'une introduction par Alexandre Zévaès, Vrin, Paris, 1982. CAVALIERI Bonaventura Geometria indivisibilibus continuorum nova quadam ratione promota , Bononiae, 1635 ; Lo Specchio ustorio overo trattato delle settioni coniche e alcuni loro mirabili effetti intorno al lume , Bologne, 1632 ; , Bononiae, 1640. Créateur de la géométrie des indivisibles CLAVIUS Christopher Algebra Christophori Clavii , Genevae, Stephanus Gamonetus, 1609 ;

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