21. The Galileo Project boulliau, ismael. 1. Dates Born Loudun, 1605 Died France, 1694 DateinfoDates Certain Lifespan 89; 2. Father Occupation Lawyer The father was a http://galileo.rice.edu/Catalog/NewFiles/boulliau.html

Boulliau, Ismael 1. Dates Born: Loudun, 1605 Died: France, 1694 Dateinfo: Dates Certain Lifespan: 2. Father Occupation: Lawyer The father was a notary in Loudun. No information on financial status. 3. Nationality Birth: France Career: France Death: France 4. Education Schooling: Paris, Poitiers Early studies were in the humanities at Loudun, then philosophy, probably at Paris, and law, possibly at Poitiers. No mention of a degree. 5. Religion Affiliation: Born a Calvinist, converted to Catholicism at 21. 6. Scientific Disciplines Primary: Astronomy, Mathematics, Optics Subordinate: Astrology. 7. Means of Support Primary: Patronage Secondary: Church Living. 1630, became a priest. Was for a short time vicar to Urbain Grandier, and helped direct the parish of Saint-Pierre du Marche (Loudun). 1633-6, settled in Paris, means of support unknown. 1636, librarian of the Hotel de Thou to the brothers Jacques and Pierre DuPuy, who themselves were the keepers of the royal library. According to Humbert he was secretary to J. Aug. de Thou ambassador of France to Holland and Constantinople, and with de Thou travelled to the Levant. 1645 and 1651, undertook long book-buying tours for the Hotel de Thou, visiting learned centers in Italy and the east, and then Holland and Germany.

22. Ismael Bullialdus: Information From Answers.com ismael Bullialdus. ismael Bullialdus (boulliaud, boulliau) (September 28, 1605 November 25, 1694) was a French astronomer. He was born in Loudun, Vienne, http://www.answers.com/topic/ismael-bullialdus

showHide_TellMeAbout2('false'); Business Entertainment Games Health ... More... On this page: Wikipedia Mentioned In Or search: - The Web - Images - News - Blogs - Shopping Ismael Bullialdus Wikipedia @import url(http://content.answers.com/main/content/wp/css/common.css); @import url(http://content.answers.com/main/content/wp/css/gnwp.css); Ismael Bullialdus Ismael Bullialdus Ismael Bullialdus (Boulliaud, Boulliau) ( September 28 November 25 ) was a French astronomer . He was born in Loudun Vienne France In , he suggested that the force of gravity follows an inverse-square law Isaac Newton made this idea precise in his 1687 work, the Principia Ismael Bullialdus died in Paris , France. External links Short biography http://www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Boulliau.html Longer biography http://web.clas.ufl.edu/users/rhatch/pages/11-ResearchProjects/boulliau/bio-historical/06-b-michaud-1843-etc.htm (in French) This entry is from Wikipedia, the leading user-contributed encyclopedia. It may not have been reviewed by professional editors (see Mentioned In Ismael Bullialdus is mentioned in the following topics: Loudun inverse-square law Timeline of black hole physics Timeline of gravitational physics and relativity ... List of craters on the Moon, A-B

23. 1645: Information From Answers.com In the year 1645 Astronomy ismael boulliau b. Loudun, France, September 28,1605, d. Paris, November 25, 1694 indicates in Astronomia philolaoica. http://www.answers.com/topic/1645

showHide_TellMeAbout2('false'); Arts Business Entertainment Games ... More... On this page: US Literature Wikipedia Mentioned In Or search: - The Web - Images - News - Blogs - Shopping In the year Astronomy Ismael Boulliau [b. Loudun, France, September 28, 1605, d. Paris, November 25, 1694] indicates in Astronomia philolaoica that the central force acting on planets must be proportional to the inverse square of the distance from the Sun (as will be proven later by Newton). Communication Meetings of The Invisible College, precursor of the Royal Society, begin in London. Led by Sir Robert Moray [b. 1608, d. 1673), it counts Robert Boyle and Christopher Wren among the first members. (See biography Sir Richard Weston, having observed crop rotation practiced successfully in Flanders, describes the concept to the English in the first written account of the method in Great Britain. English physician Daniel Whistler [b. Elvington, England, 1619, d. 1684] gives the first medical description of rickets in his medical doctor's thesis at the University of Leiden (Netherlands). Tools An early version of Blaise Pascal's adding and subtracting machine, the pascaline, goes on sale.

24. La Matematica Antica Su CD Rom Translate this page boulliau, ismael - De lineis spiralibus. Parigi, Cramoisy, 1657. boulliau, ismael -Exercitationes geometricae tres. Parigi, Cramoisy, 1657. http://www2.math.unifi.it/~archimede/archimede/CD_rom/elenco_CD.php

La matematica antica su CD-rom: una iniziativa del Giardino di Archimede per la storia della matematica Indice come acquistare i CD serie I CD 1 CD 2 CD 3 CD 4 ... CD 10 serie II CD 11 CD 12 CD 13 CD 14 ... CD 20 serie III CD 21 CD 22 CD 23 CD 24 ... CD 30 serie IIII CD 31 CD 32 CD 33 CD 34 GdA 1 Bernoulli, Johann - Opera. Losanna e Ginevra, Bousquet, 1747. Clairaut, Alexis Claude - Clairaut, Alexis Claude - Recherches sur les courbes a double courbure. Euler, Leonhard - Lione, Bruyset, 1795. Hermann, Jacob - Phoronomia. Amsterdam, Wetsten, 1716. Lagrange, Joseph Louis - Mecanique analytique. Parigi, Courcier, 1811. Lagrange, Joseph Louis - Theorie des fonctions analytiques. Parigi, Impr. De la Republique, 1797. Mascheroni, Lorenzo - Adnotationes ad calculum integralem Euleri. Pavia, Galeazzi, 1790. Monge, Gaspard - Geometrie descriptive. Parigi, Baudouin, 1799. Papin, Denis - Nouvelle maniere pour lever l'eau. Kassel, Estienne, 1707. Ruffini, Paolo - Teoria generale delle equazioni. Bologna, S. Tommaso, 1799. Simpson, Thomas - A treatise on Algebra. Londra, Nourse, 1745.

25. La Matematica Antica Su CD-ROM Translate this page boulliau, ismael - De natura lucis . Paris, Heuqueville, 1638 - boulliau, ismael -Philolai, sive de vero systemate mundi libri IV . Amsterdam, Blaev, 1639 http://www.digento.de/zusatz/100109_01.html

Startseite Kontakt Impressum Newsletter ... La matematica antica su CD-ROM CD numero 1 - Bernoulli, Johann - Opera. Losanna e Ginevra, Bousquet, 1747. - Hermann, Jacob - Phoronomia. Amsterdam, Wetsten, 1716. - Lagrange, Joseph Louis - Mecanique analytique. Parigi, Courcier, 1811. - Lagrange, Joseph Louis - Theorie des fonctions analytiques. Parigi, Impr. De la Republique, 1797. - Mascheroni, Lorenzo - Adnotationes ad calculum integralem Euleri. Pavia, Galeazzi, 1790. - Monge, Gaspard - Geometrie descriptive. Parigi, Baudouin, 1799. - Papin, Denis - Nouvelle maniere pour lever l'eau. Kassel, Estienne, 1707. - Ruffini, Paolo - Teoria generale delle equazioni. Bologna, S. Tommaso, 1799. - Simpson, Thomas - A treatise on Algebra. Londra, Nourse, 1745. CD numero 2 - Anderson, Alexander - Ad angularium sectionum analyticen. Parigi, Varennes, 1615. - Anderson, Alexander - Exercitationum mathematicarum decas prima. Parigi, Varennes, 1619. - Boulliau, Ismael - De lineis spiralibus. Parigi, Cramoisy, 1657.

26. Ismail Bouillaud (Bullialdus, 1605-1694) Ismail Bouillaud (or boulliau, or latinized Bullialdus) was a French librarian,astronomer and priest, ismael boulliau Biography (Galileo Project) http://www.seds.org/messier/xtra/Bios/bullialdus.html

Ismail Bouillaud (Bullialdus; September 28, 1605 - November 25, 1694) Ismail Bouillaud (or Boulliau, or latinized Bullialdus) was a French librarian, astronomer and priest, who was born in 1605 in Loudun where he studied, then traveling in Italy, Holland and Germany for buying books. He published Astronomia philolaica in 1645, supporting Kepler's elliptical orbits, and assuming an inverse-square force law for the first time. He observed the Andromeda "Nebula" ( ) in 1661, but according to Allen (1899/1963) , he expressedly mentioned that this "Nebula" had been observed 150 years earlier by some anonymous but expert astronomer. Nevertheless, Edmond Halley accounted the discovery of this object to him in his 1716 treat of Nebulae Because the "nebula" had not been documented by so many famous astronomers, Boulliau suspected that it might been variable, similar to Mira Ceti which he also studied, and attempted to calculate a period of variation - of 333 days, compared to the modern value of 332. He died in 1694 in Paris.

27. Ismael Bullialdus -- Facts, Info, And Encyclopedia Article ismael Bullialdus (boulliaud, boulliau) (September 28, 1605 November 25, 1694)was a (The Romance language spoken in France and in countries colonized by http://www.absoluteastronomy.com/encyclopedia/i/is/ismael_bullialdus.htm

Ismael Bullialdus [Categories: French mathematicians, French astronomers, 1694 deaths, 1605 births] Ismael Bullialdus (Boulliaud, Boulliau) (September 28, 1605 - November 25, 1694) was a (The Romance language spoken in France and in countries colonized by France) French (A physicist who studies astronomy) astronomer . He was born in (Click link for more info and facts about Loudun) Loudun (Click link for more info and facts about Vienne) Vienne (A republic in western Europe; the largest country wholly in Europe) France In 1640, he suggested that the force of (A solemn and dignified feeling) gravity follows an (Click link for more info and facts about inverse-square law) inverse-square law (English mathematician and physicist; remembered for developing the calculus and for his law of gravitation and his three laws of motion (1642-1727)) Isaac Newton made this idea precise in his 1687 work, the (Click link for more info and facts about Principia) Principia Ismael Bullialdus died in (The capital and largest city of France; and international center of culture and commerce) Paris , France.

28. History Of Astronomy: What's New At This Site On August 30, 1999 boulliau, ismael (16051694). Project boulliau Short biography, CorrespondenceNetwork, letters, and other topics. Bracewell, Ronald Newbold (b. 1921) http://www.astro.uni-bonn.de/~pbrosche/new/new990830.html

History of Astronomy What's new History of Astronomy: What's new at this site on August 30, 1999 Several URLs have been updated. Welcome / About Citation Index updated Acknowledgements updated History of astronomy General From the Big Bang to the End of the Universe: The Mysteries of Deep Space Timeline Includes some history of astronomy. Observatories and other places Auckland , New Zealand The Astronomical History of the Auckland Province , by R. A. McIntosh and John Grigg From The Amateur Astronomer, Vol. 17, No. 2, May 1957, p. 20-22; No. 3, Dec. 1957, p. 40-42; Vol. 18, No. 1, June 1958, p. 3-6; No. 2, Dec. 1958, p. 20-23; No. 3, May 1959, p. 46-48; No. 4, Dec. 1959, p. 60-65. London , Ontario, Canada A History of the Department of Physics and Astronomy at the University of Western Ontario , by Donald R. Moorcroft (See also Introduction From Physics in Canada, Vol. 55, No. 4, July/Aug. 1999, p. 159-176 Ottobeuren , Germany Sternwarte Ottobeuren (in German) Public observatory.

29. History Of Astronomy: What Was New At This Site, September 19, 2003 - February 1 boulliau Bouillaud, ismael Bullialdus (16051694). Short biography, references,links (H. Frommert, C. Kronberg) http://www.astro.uni-bonn.de/~pbrosche/new/new040212.html

History of Astronomy What's new History of Astronomy: What was new at this site, September 19, 2003 - February 12, 2004 Some URLs have been updated. Welcome / About Site map (complete Table of Contents) updated Acknowledgements updated History of astronomy Persons A Al Sufi, Abd-al-Rahman [Abr-ar Rahman As Sufi; Abd al Rahman Abu al Husain; Azophi] (903-986) Short biography, references, links (H. Frommert, C. Kronberg) Arrest, Heinrich Louis d' (1822-1875) Very short biography (H. Frommert, C. Kronberg) B Bethe, Hans Albrecht (b. 1906) Short biography, references and links (Bruce medal.) Bevis, John (1695-1771) Short biography, references, links (H. Frommert, C. Kronberg) Bode, Johann Elert (1747-1826) Short biography, references, links (H. Frommert, C. Kronberg) Boulliau [Bouillaud], Ismael [Bullialdus] (1605-1694) Short biography, references, links (H. Frommert, C. Kronberg) C Short biography, references, links (H. Frommert, C. Kronberg) Cassini, Jacques [Cassini II] (1677-1756) Short biography, references

30. Gale-Edit - Dictionary Of Science Biography - Scientists By Name Bougainville, Louis Antoine de; Bouguer, Pierre; Bouin, Pol Andre; Boule,Marcellin; Boullanger, NicolasAntoine; boulliau, ismael; Bouquet, Jean-Claude http://www.gale-edit.com/ndsb/scientists.htm

Home Suggestions for Inclusion Editorial Board About Charles Scribner's Sons ... Z A Abailard, Pierre Abano, Pietro Abano, Pietro d' 'Abbas Ibn Firnas Abbe, Cleveland Abbe, Ernst Abel, John Jacob Abel, Niels Henrik Abel, Othenio Abetti, Antonio Abich, Otto Hermann Wilhelm Abney, William de Wiveleslie Abraham Bar Hiyya Ha-Nasi Abraham, Max Abreu, Aleixo Abreu, Aleixo de Abu Hamid al-Gharnati Abu Kamil Shuja' Ibn Aslam Ibn Muhammad Ibn Shuja' Abu Ma'shar al-Balkhi, Ja'far Ibn Muhammad Abu'l-Barakat al-Baghdadi, Hibat Allah Abu'l-Fida' Isma'il Ibn 'Ali Ibn Mahmud Ibn . . . Ayyub, 'Imad al-Din Abu'l-Wafa' al-Buzjani, Muhammad Ibn Muhammad ~Ibn Yahya Ibn Isma'il Ibn al- 'Abbas Abu'l-Wafa' al-Buzjani, Muhammad Ibn Muhammad Ibn Yahya Ibn Isma'il Ibn al- 'Abbas Accum, Friedrich Christian Achard, Franz Karl Acharius, Erik Achillini, Alessandro Acosta, Cristobal Acosta, Jose Acosta, Jose de Acyuta Pisarati Adam of Bodenstein Adams, Frank Dawson Adams, John Couch Adams, Leason Heberling Adams, Roger Adams, Walter Sydney Adanson, Michel Addison, Thomas Adelard of Bath Adet, Pierre-Auguste

31. Physics Time-Line To 1799 1645 ismael boulliau, inverse square law for central force acting on planets1648 Blaise Pascal, explains barometer as a result of atmospheric pressure http://www.cartage.org.lb/en/themes/Sciences/Physics/aboutphysics/physicstimelin

Themes Science Physics About Physics, Generalities ... Physics Time-Line Physics Time-Line to 1799 Nicolaus Copernicus Thales of Miletus , prediction of an eclipse Thales of Miletus , birth of scientific thought Thales of Miletus , water as the basic element Thales of Miletus , magnets and attraction to rubbed amber Thales of Miletus , first cosmologies Anaximenes , flat Earth Pythagoras , understanding the world and mathematics Anaximander , Earth surface is curved (cylinder) Parmenides , paradoxes of change and motion Pythagoreans , Earth is a sphere Oenopides , finds angle of Earth's tilt to ecliptic Protagoras , reality comes from the senses Heraclitus , fire as primary substance Heraclitus , change is the essence of being Parmenides , Earth is a sphere Anaxagoras , materials are made of "seeds" (atoms) Anaxagoras , sun, moon and stars are made of same material as Earth Anaxagoras , sun as a hot glowing rock Eudoxus , Celestial spheres Empedocles , Four elements: Earth, Air, Fire and Water Philolaus , Earth Rotates Zeno , paradoxes of discrete or continuous space and time Leucippus , indivisble atoms Democritus , Atomic theory Plato , theory of knowledge Plato , ether as a fifth element Democritus , Milky Way is composed of many stars Aristotle , Free falling bodies accelerate but heavier bodies fall faster Heracleides , Venus and Mercury orbit the sun Chinese , recorded observation of a supernova Heracleides , Rotation of the Earth Aristotle , Earth is a sphere Aristotle

32. List Of Scientists By Field Translate this page boulliau, ismael. boulliau, ismael. Bouquet, Jean-Claude. Bour, Edmond. Bour,Edmond. Bour, Edmond. Bourdelin, Claude. Bourdelot, Pierre Michon http://www.indiana.edu/~newdsb/b.html

Baade, Wilhelm Heinrich Walter Babbage, Charles Babbage, Charles Babcock, Ernest Brown Babcock, Stephen Moulton Babcock, Stephen Moulton Babinet, Jacques Babinet, Jacques Babington, Charles Cardale Babington, William Baccelli, Guido Bach, Aleksei Nikolaevich Bach, Aleksei Nikolaevich Bache, Alexander Dallas Bachelard, Gaston Bachelier, Louis Bachmann, Augustus Quirinus Bachmann, Paul Gustav Heinrich Back, Ernst E. A. Bacon, Francis Bacon, Roger Bacon, Roger Bacon, Roger Badger, Richard McLean Badger, Richard McLean Baekeland, Leo Hendrik Baer, Karl Ernst von Baer, Karl Ernst von Baer, Karl Ernst von Baeyer, Adolf Johann Friedrich Wilhelm von Baglivi, Georgius Baier, Johann Jacob Baier, Johann Jacob Baier, Johann Jacob Bailey, Edward Battersby Bailey, Liberty Hyde Bailey, Loring Woart Bailey, Solon Irving Baillie, Matthew Baillou, Guillaume de Bailly, Jean-Sylvain Baily, Francis Baily, Francis Bain, Alexander Bain, Alexander Baird, Spencer Fullerton Baird, Spencer Fullerton Baker, Henry Baker, John Gilbert Bakewell, Robert Balandin, Aleksey Aleksandrovich Balbus Balbus Baldi, Bernardino

33. New Dictionary Of Scientific Biography boulliau, ismael Bour, Edmond Bouvard, Alexis Bowditch, Nathaniel Bowen, IraSprague Bradley, James Brahe, Tycho Brahmadeva Brahmagupta http://www.indiana.edu/~newdsb/astor.html

Make Suggestions Astronomical Sciences Abbe, Cleveland Abetti, Antonio Abney, William de Wiveleslie Abraham Bar ?iyya Ha-Nasi Ab?'l-Waf al-B?zj?n?, Mu?ammad Ibn Mu?ammad Ibn Ya?y? Ibn Ism?l Ibn al- ?Abb?s Acyuta Pira?i Adams, John Couch Adelard of Bath Ailly, Pierre d' Airy, George Biddell Aitken, Robert Grant Albrecht, Carl Theodor Alfonso El Sabio Alzate y Ramírez, José Antonio Anaximander Andoyer, Henri André, Charles Louis François Angelus, Johannes Ångstrüm, Anders Jonas Anthelme, Voituret Antiphon Antoniadi, Eugène M. Apian, Peter Arago, Dominique François Jean Aratus of Soli Argelander, Friedrich Wilhelm August Argoli, Andrea Aristarchus of Samos Aristotle Aristyllus Arrest, Heinrich Louis d' Asada G?ry? Autolycus of Pitane Auwers, Arthur Julius Georg Friedrich von Auzout, Adrien Baade, Wilhelm Heinrich Walter Babinet, Jacques Backlund, Jüns Oskar Bailey, Solon Irving Bailly, Jean-Sylvain Baily, Francis Banachiewicz, Thaddeus Ban? M?s? Baranzano, Giovanni Antonio

34. Les Grands Noms De L Translate this page boulliau, ismael. Né à Loudun le 28 septembre 1605 - Décédé en 1694 en France.Son père était avocat et un notaire dans Loudun. Il fit ses études à Paris, http://site.voila.fr/reeves/astronomes/abpage.html

Les Grands Noms de l'Astronomie A-B A Adams, John Couch (1819-1892) né le 5 juin 1819 dans Laneast, Cornwall, Angleterre- Mort le 21 janv.1892 à Cambridge, Angleterre. Astronome et mathématicien anglais qui s'est rapidement intéressé à l'astronomie. Dès ses16 ans, il avait déjà établi quand une éclipse annulaire du soleil serait évidente dans Lidcot. Adams a fait ses études à l'université de Cambridge. Il a commencé une licence en octobre 1839 et reçu un diplôme. A l'âge de 24 ans, alors que toujours en étudiant préparant une licence, il décidait d'étudier les irrégularités du mouvement d'Uranus, afin de découvrir si elles pouvaient être attribuées à l'action d'une planète encore non découverte au delà d'elle. Il a été la première personne à prédire la position d'un objet de masse planétaire au-delà d'Uranus. Mais, malheureusement, Adams ne pu publié sa prédiction. Galle confirma l'existence de Neptune à partir de calculs indépendants faits par Le Verrier.

35. Galileo Project Scientists: http//es.rice.edu/ES/humsoc/Galileo/Catalog/Files/botallo.html. boulliau, ismael.http//es.rice.edu/ES/humsoc/Galileo/Catalog/Files/boulliau.html http://www.tektonics.org/scim/galilmony.html

Scientists of the Christian Faith: From the Era of Galileo The Galileo Project is a hypertext source of information on the life and work of Galileo Galilei (1564-1642) and the science of his time. The project, whose homepage is here: http://es.rice.edu/ES/humsoc/Galileo/ , is supported by the Office of the Vice President of Computing of Rice University. The initial stages were made possible by a grant from the Council on Library Resources to Fondren Library. Contributors to the Project are noted here: http://es.rice.edu/ES/humsoc/Galileo/About/galileo_development.html Albert Van Helden, Lynette Autrey Professor of History at Rice University, is responsible for the written text in the Project (except where otherwise noted). The Project features a Catalog of the Scientific Community of the 16th and 17th Centuries at http://es.rice.edu/ES/humsoc/Galileo/Catalog/catalog.html This is a searchable database of detailed histories of over 600 individuals who made significant contributions to Western science. These histories have been compiled by Richard S. Westfall, Department of History and Philosophy of Science at Indiana University. From this I’ve compiled a list of 522 Galileo-era scientists known to be Christians, with links to biographies from the Galileo Project.

36. The Fahrenheit Temperature Scale He adapted the idea of ismael boulliau to use quicksilver, which we now know asmercury, in his higher quality thermometer tubes. As Klein says, Had it not http://www.acsu.buffalo.edu/~insrisg/nature/nw05/0508Fahrenheit.htm

That Weird Fahrenheit Temperature Scale (This 736th Buffalo Sunday News column was first published on May 8, 2005.) We have come to accept some rather strange numbers as part of our culture. Thus, on the Fahrenheit scale which we still use in this country we have 32° as the temperature at which water freezes and 212° the temperature at which it boils. Why those particular numbers? Are they just two more values to make school science tests difficult? Clearly the Celsius scale with water freezing at and boiling at 100 degrees is easier to remember, but my concern here is not promotion of the metric system. It doesn't need my support. Rather I will explore the history that led to those numbers on the Fahrenheit scale. I was led to this history by my former student, Dipendra Bhattacharya, now a professor at Clarion University of Pennsylvania. He was asked why those numbers were chosen and passed on the question to me. I found the answer in H. Arthur Klein's 1974 book, The World of Measurements, and I summarize his answer here. Turn back the calendar over 300 years and you will find that there were very few instruments for measuring temperature. Then in about 1700, the Danish astronomer, Ole Roemer, already famous for his proof that light travels at a finite speed, not instantaneously as had been believed, turned his attention to this problem.

37. List B This Page Is Still Under Construction, This Work Will boulliau Bouillau, ismael (1605 1694), see Bullialdus Bouvard, Alexis (1767 -1843) Bullialdus boulliaud, boulliau, ismael (1605 - 1694) http://www.plicht.de/chris/files/b.htm

List B This page is still under construction, this work will probably never finish. (Entries marked with 'r' were revised after March 1999) Back to A-Z Babcock, Harold Delos (1882 - 1968) Babcock, Horace Welcome (1912 - ) Babinet, Jaques (1794 - 1873) ... Brag, Jonas (1781 - 1857) Brahe, Tycho, see Tycho (1546 - 1601) Brambilla, Enrico (1792 - 1828) Brandes, Heinrich Wilhelm (1777 - 1834) Bredichin, Feodor Alexandrowich (1831 - ) Bredman, Johann (1770 - ) ... De Ball, L. (1853 - ) Baade, Wilhelm Heinrich Walter Babcock, Harold Delos (1882 - 1968) Father of H. W. Babcock Babcock, Horace Welcome (1912 - ) Babinet, Jaques (1794 - 1873) J. Babinet was born in Lusignan, Dept. Vienne, on the 5. March 1794. He was Professor of mathematics in Fontenay-le-Comte and Professor of physics in Poitiers and at the College Louis- Grande in Paris. Babinet helped to improve the knowledge on astronomy with his works on optics. A list of his work is in Pogg., Vol. 1. Back, Ernst Emil Alexander (1881 - 1959) Ernst E. A. Back was born on the 21. October 1881 in Freiburg and visited school (Gymnasium) in Strasbourg until 1900. Before his studies on Physics in Tuebingen between 1909-13 he studied law from 1902-06 in Strasbourg, Munich and Berlin. Between 1907 and 1909 Back worked for the administration of justice in Alsac-Lorraine. In 1909 he asked for a leave to finish his studies on Physics, which was granted, and left the administration of justice in 1912. He received his Ph.D. (Dr.) 1913 in Tuebingen as a pupil of Friedrich Paschen. His thesis, titled 'Zur Prestonschen Regel', covered a topic which is today known as the 'Paschen-Back-Effect'. The main instrumental improvements which allowed Back to do his studies were on the light source, which had to work in a small gap only 4 mm (3/16") wide between the poles of a strong electromagnet.

38. Pierre Dupuy, Jacques Dupuy, Presented By Olivier THILL. 1652, ismael boulliau resides in the house of Jacques Dupuy. 28 Jun. 1654,Rome, death of Christophe, brother of Pierre and Jacques Michaud, Hoefer, Moreri, http://members.aol.com/OlivThill/dupuy1.htm

Pierre Dupuy (1582-1651) - Jacques Dupuy (1591-1656) Presented by Olivier Thill Short résumé Pierre and Jacques Dupuy live in Paris, in the first half of the 17th century, at the time of king Louis XIII, Richelieu, Corneille, Descartes, Mersenne, Peiresc, Gassendi, Fermat, Kepler, Galileo, Harvey, the 30-year war. Pierre and Jacques are from a family of high-ranking civil servants, allied to the most prestigious families of French parlementarians: de Thou, Séguier, Harlay. Their father, Claude Dupuy, exchanges letters with learned men from Italy and the Low Countries. Pierre and Jacques inherits many books. They collect and catalogue books and old manuscripts. Their big libray will be acquired by the French kingdom. Pierre and Jacques are the main correspondents of Peiresc in Paris. Pierre and Jacques have visits of learned friends every afternoon. These meetings are called académie des frères Dupuy and later cabinet des frères Dupuy Lives of Pierre and Jacques Dupuy, and their close relatives Date Event Clément Dupuy, the grand-father of Pierre and Jacques, is

39. Optics, Antiquariaat Forum boulliau, ismael. De natura lucis. Paris, Ludovicus de Heuqueville, 1638. 348 ff.; Henk JM Nellen, Ismaël boulliau, 1994, p. 71 ff., et passim. http://www.forum-hes.nl/forum/main_stocklist.phtml/subject/120/1/Optics.html

Optics 20 items were found for this query Page 1 of 2 View picture(s) ECRANS gravés au Feuilles. (Paris, ca. 1750). Oblong 4to. Contemp. boards, with ms. title-label on spine. With 27 engraved circular "screens" with 65 illustrations of plants, flowers, animals, birds, a dolphin, a Triton, fire, clouds, a rainbow, the twelve signs of the Zodiac, astronomical constellations, etc., arranged around a small central rosette and set within wide ornamental borders with blank spaces at regelar distances with the number and title of the illustration underneath, all finely and very beautifully coloured by hand. 27 lvs. with explanatory text on engraved circular plates of the same size as the "screens". An extremely rare 18th century forerunner of the Phenacistiscope, Stroboscope, Phantascope, or "Wonderdiscs", which would become very popular in the 19th century. The present plates were intended to be cut, the text-plates mounted on the back, and the plates with the rosette in centre set on a sort of spindle, so each part of the plate could be shown separately and the text read from the back. Our set of movable plates was meant to teach the children classical mythology and especially to explain Ovid's "Metamorphoses". The transfigurations could be made to happen really by means of the present optical game. Fine, unused set of plates, finely coloured by hand.

40. Encyclopedia: Inverse-square Law ismael Bullialdus ismael Bullialdus (boulliaud, boulliau) (September 28, 1605 November 25, 1694) was a French astronomer. Sir Isaac Newton in Godfrey http://www.nationmaster.com/encyclopedia/Inverse_square-law

Supporter Benefits Signup Login Sources ... Pies Related Articles People who viewed "Inverse-square law" also viewed: Inverse square law Coulomb's law Synthetic Aperture Radar Child labor laws ... Millimeter cloud radar What's new? Our next offering Latest newsletter Student area Lesson plans Recent Updates Springfield (The Simpsons) Sporting Clube de Portugal Spanglish Southern United States ... More Recent Articles Top Graphs Richest Most Murderous Most Taxed Most Populous ... More Stats Encyclopedia: Inverse-square law Updated 9 days 8 hours 56 minutes ago. Other descriptions of Inverse-square law This diagram shows how the law works. The lines represent the flux emanating from the source. The total number of flux lines depends on the strength of the source and is constant with increasing distance. A greater density of flux lines (lines per unit area) means a stronger field. The density of flux lines is inversely proportional to the square of the distance from the source because the surface area of a sphere increases with the square of the radius. Thus the strength of the field is inversely proportional to the square of the distance from the source. In physics , an inverse-square law is any physical law stating that some physical quantity or strength is inversely proportional to the square of the distance from the source of that physical quantity. In particular:

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