Testing Relativity from the 1919 Eclipse— a Question of Bias Daniel Kennefick
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Assaj V2 N4 1930-Jan
ijtlJt Journal {If tl]t J\.strauamital ~ add!,! af ~ autb J\.frita. Vol. II. JANUARY, 1930. No.4. Astronomical Society of South Africa~ "' AT HOME" TO VISITING ASTRONOMERS OF THE BRITISH ASSOCIATION. July 26, 1929, will long be remembered in the annals of the Astronomical Society of South Africa, for on the evening of that day it was "At Home" at the Oddfellows' Hall, Plein Street, Cape Town, to the visiting astronomers who were attending the meetings of the British Association. The chair was taken by Mr. A. W. Long, President of the Society, who, in opening the proceedings, said: This gathering of the Astronomical Society of South Africa has been arranged to enable the members to greet the distinguished astronomers and other eminent scien tists interested in astronomy who are visiting South Africa in connection with the meetings of the British Association. We have with us to-night Sir Frank Dyson, the Astronomer Royal; Professor Eddington, Director of the Cambridge University Observatory; Professor Fowl~r, Yarrow Research Professor of the Royal Society; Pro fessor Chapman, of the Imperial College of Science; Professor De Sitter, Director of the Leiden Observatory; Dr. Guthnick, Director of the Berlin-Babelsberg Obser vatory; Dr. K110x-Shaw, Director of the Radcliffe Observatory; Mr. Greaves, of the Greenwich Observa tory; Mr. Wrigley, of the Edinburgh Observatory; Dr. Aston, of Cambridge, and I am pleased to say that at a later stage Lord Rayleigh will also be here. In the name of the Society I extend to these gentlemen a very hearty welcome. We have been familiar with them for a very long time by name, and through their scientific attainments; now we are delighted to have the honour of meeting them in person. -
Former Fellows Biographical Index Part
Former Fellows of The Royal Society of Edinburgh 1783 – 2002 Biographical Index Part Two ISBN 0 902198 84 X Published July 2006 © The Royal Society of Edinburgh 22-26 George Street, Edinburgh, EH2 2PQ BIOGRAPHICAL INDEX OF FORMER FELLOWS OF THE ROYAL SOCIETY OF EDINBURGH 1783 – 2002 PART II K-Z C D Waterston and A Macmillan Shearer This is a print-out of the biographical index of over 4000 former Fellows of the Royal Society of Edinburgh as held on the Society’s computer system in October 2005. It lists former Fellows from the foundation of the Society in 1783 to October 2002. Most are deceased Fellows up to and including the list given in the RSE Directory 2003 (Session 2002-3) but some former Fellows who left the Society by resignation or were removed from the roll are still living. HISTORY OF THE PROJECT Information on the Fellowship has been kept by the Society in many ways – unpublished sources include Council and Committee Minutes, Card Indices, and correspondence; published sources such as Transactions, Proceedings, Year Books, Billets, Candidates Lists, etc. All have been examined by the compilers, who have found the Minutes, particularly Committee Minutes, to be of variable quality, and it is to be regretted that the Society’s holdings of published billets and candidates lists are incomplete. The late Professor Neil Campbell prepared from these sources a loose-leaf list of some 1500 Ordinary Fellows elected during the Society’s first hundred years. He listed name and forenames, title where applicable and national honours, profession or discipline, position held, some information on membership of the other societies, dates of birth, election to the Society and death or resignation from the Society and reference to a printed biography. -
The Worshipful Company of Clockmakers Past Masters Since 1631
The Worshipful Company of Clockmakers Past Masters since 1631 1631 David Ramsey (named in the Charter) 1700 Charles Gretton 1800 Matthew Dutton 1632 David Ramsey (sworn 22nd October) 1701 William Speakman 1801 William Plumley 1633 David Ramsey, represented by his Deputy, Henry Archer 1702 Joseph Windmills 1802 Edward Gibson 1634 Sampson Shelton 1703 Thomas Tompion 1803 Timothy Chisman 1635 John Willow 1704 Robert Webster 1804 William Pearce 1636 Elias Allen 1705 Benjamin Graves 1805 William Robins 1638 John Smith 1706 John Finch 1806 Francis S Perigal Jnr 1639 Sampson Shelton 1707 John Pepys 1807 Samuel Taylor 1640 John Charleton 1708 Daniel Quare 1808 Thomas Dolley 1641 John Harris 1709 George Etherington 1809 William Robson 1642 Richard Masterson 1710 Thomas Taylor 1810 Paul Philip Barraud 1643 John Harris 1711 Thomas Gibbs 1811 Paul Philip Barraud 1644 John Harris 1712 John Shaw 1812 Harry Potter (died) 1645 Edward East 1713 Sir George Mettins (Lord Mayor 1724–1725) 1813 Isaac Rogers 1646 Simon Hackett 1714 John Barrow 1814 William Robins 1647 Simon Hackett 1715 Thomas Feilder 1815 John Thwaites 1648 Robert Grinkin 1716 William Jaques 1816 William Robson 1649 Robert Grinkin 1717 Nathaniel Chamberlain 1817 John Roger Arnold 1650 Simon Bartram 1718 Thomas Windmills 1818 William Robson 1651 Simon Bartram 1719 Edward Crouch 1819 John Thwaites 1652 Edward East 1720 James Markwick 1820 John Thwaites 1653 John Nicasius 1721 Martin Jackson 1821 Benjamin Lewis Vulliamy 1654 Robert Grinkin 1722 George Graham 1822 John Jackson Jnr 1655 John Nicasius -
Henry Cavendish and the Effect of Gravity on Propagation of Light
Eur. Phys. J. H (2021) 46:24 THE EUROPEAN https://doi.org/10.1140/epjh/s13129-021-00027-4 PHYSICAL JOURNAL H Regular Article Henry Cavendish and the effect of gravity on propagation of light: a postscript Karl-Heinz Lotze and Silvia Simionatoa Friedrich Schiller Universit¨at Jena, Physikalisch-Astronomische Fakult¨at, Jena, Germany Received 21 April 2021 / Accepted 13 August 2021 © The Author(s) 2021 Abstract This paper is devoted to two hitherto unpublished original documents by Henry Cavendish (1731–1810) which provide insight into his calculations of the deflection of light by isolated celestial bodies. Together with a transcription of these documents, we comment on their contents in the present-day language of physics. Moreover, we compare them with a paper by Johann Georg von Soldner (1776–1833) on the same subject. 1 Introduction The history of ideas about the deflection of light by the gravitational attraction of celestial bodies goes back to the times of Isaac Newton (1642–1726). In fact, in his book Opticks [18] he, in 1704, asks the question (3rd Book, Query No. 1): Do not Bodies act upon Light at a distance, and by their action bend its Rays, and is not this action (caeteris paribus) strongest at the least distance? Another of his queries even gives us an idea of how Newton imagined light itself (Query No. 29): Are not the Rays of Light very small Bodies emitted from shining Substances? However, the first published calculation of this kind of light deflection goes back to the German astronomer and geodesist Johann Georg von Soldner (1776–1833) [25]. -
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244 Trimble, JAAVSO Volume 43, 2015 As International as They Would Let Us Be Virginia Trimble Department of Physics and Astronomy, University of California, Irvine, CA 92697-4575; [email protected] Received July 15, 2015; accepted August 28, 2015 Abstract Astronomy has always crossed borders, continents, and oceans. AAVSO itself has roughly half its membership residing outside the USA. In this excessively long paper, I look briefly at ancient and medieval beginnings and more extensively at the 18th and 19th centuries, plunge into the tragedies associated with World War I, and then try to say something relatively cheerful about subsequent events. Most of the people mentioned here you will have heard of before (Eratosthenes, Copernicus, Kepler, Olbers, Lockyer, Eddington…), others, just as important, perhaps not (von Zach, Gould, Argelander, Freundlich…). Division into heroes and villains is neither necessary nor possible, though some of the stories are tragic. In the end, all one can really say about astronomers’ efforts to keep open channels of communication that others wanted to choke off is, “the best we can do is the best we can do.” 1. Introduction astronomy (though some of the practitioners were actually Christian and Jewish) coincided with the largest extents of Astronomy has always been among the most international of regions governed by caliphates and other Moslem empire-like sciences. Some of the reasons are obvious. You cannot observe structures. In addition, Arabic astronomy also drew on earlier the whole sky continuously from any one place. Attempts to Greek, Persian, and Indian writings. measure geocentric parallax and to observe solar eclipses have In contrast, the Europe of the 16th century, across which required going to the ends (or anyhow the middles) of the earth. -
Einstein's Gravitational Field
Einstein’s gravitational field Abstract: There exists some confusion, as evidenced in the literature, regarding the nature the gravitational field in Einstein’s General Theory of Relativity. It is argued here that this confusion is a result of a change in interpretation of the gravitational field. Einstein identified the existence of gravity with the inertial motion of accelerating bodies (i.e. bodies in free-fall) whereas contemporary physicists identify the existence of gravity with space-time curvature (i.e. tidal forces). The interpretation of gravity as a curvature in space-time is an interpretation Einstein did not agree with. 1 Author: Peter M. Brown e-mail: [email protected] 2 INTRODUCTION Einstein’s General Theory of Relativity (EGR) has been credited as the greatest intellectual achievement of the 20th Century. This accomplishment is reflected in Time Magazine’s December 31, 1999 issue 1, which declares Einstein the Person of the Century. Indeed, Einstein is often taken as the model of genius for his work in relativity. It is widely assumed that, according to Einstein’s general theory of relativity, gravitation is a curvature in space-time. There is a well- accepted definition of space-time curvature. As stated by Thorne 2 space-time curvature and tidal gravity are the same thing expressed in different languages, the former in the language of relativity, the later in the language of Newtonian gravity. However one of the main tenants of general relativity is the Principle of Equivalence: A uniform gravitational field is equivalent to a uniformly accelerating frame of reference. This implies that one can create a uniform gravitational field simply by changing one’s frame of reference from an inertial frame of reference to an accelerating frame, which is rather difficult idea to accept. -
One of the Most Celebrated Physics Experiments of the 20Th Cent
Not Only Because of Theory: Dyson, Eddington and the Competing Myths of the 1919 Eclipse Expedition Introduction One of the most celebrated physics experiments of the 20th century, a century of many great breakthroughs in physics, took place on May 29th, 1919 in two remote equatorial locations. One was the town of Sobral in northern Brazil, the other the island of Principe off the west coast of Africa. The experiment in question concerned the problem of whether light rays are deflected by gravitational forces, and took the form of astrometric observations of the positions of stars near the Sun during a total solar eclipse. The expedition to observe the eclipse proved to be one of those infrequent, but recurring, moments when astronomical observations have overthrown the foundations of physics. In this case it helped replace Newton’s Law of Gravity with Einstein’s theory of General Relativity as the generally accepted fundamental theory of gravity. It also became, almost immediately, one of those uncommon occasions when a scientific endeavor captures and holds the attention of the public throughout the world. In recent decades, however, questions have been raised about possible bias and poor judgment in the analysis of the data taken on that famous day. It has been alleged that the best known astronomer involved in the expedition, Arthur Stanley Eddington, was so sure beforehand that the results would vindicate Einstein’s theory that, for unjustifiable reasons, he threw out some of the data which did not agree with his preconceptions. This story, that there was something scientifically fishy about one of the most famous examples of an experimentum crucis in the history of science, has now become well known, both amongst scientists and laypeople interested in science. -
Light and Gravitation from Newton to Einstein
Light and gravitation from Newton to Einstein Jean Eisenstaedt - Observatoire de Paris Abstract: How was treated the propagation of light after Newton, before Einstein? From the second half of the 18th century to the early 19th century, the Newtonian theory of propagation of light, a perfectly consistent applica- tion of the Principia to light was developed by John Michell (1724-1793) and then many philosophers. It was as well a classical relativistic optics of moving bodies. In the context of Newton’s Principia, light corpuscles were treated in the very same way as material particles. Thus they were subject to the Galileo- Newtonian kinematics: light velocity was not a constant. Light corpuscles were also subject to the Newtonian dynamics, in particular to two forces, the long-range gravitational force and the short-range refracting force acting on a glass, a crystal. Snell-Descartes’ sinus law implies that greater is the incident velocity of light, lower is the refraction angle on a prism. Thus the measure of the re- fraction angle is a measure of the incident velocity of light, a "method" due to Michell. In 1786 Robert Blair applied Michell’s method to light kinemat- ics and addresses in a very clear way what we call the Doppler effect. The effects of gravity on light in a Newtonian context are qualitatively simi- lar to those predicted by general relativity much later. In 1784 Michell pre- dicted the slowing-down of light by gravitation, and inferred the existence of dark bodies as Pierre Simon Laplace later called them; they are black holes’s cousins. -
November 2019
A selection of some recent arrivals November 2019 Rare and important books & manuscripts in science and medicine, by Christian Westergaard. Flæsketorvet 68 – 1711 København V – Denmark Cell: (+45)27628014 www.sophiararebooks.com AMPÈRE, André-Marie. THE FOUNDATION OF ELECTRO- DYNAMICS, INSCRIBED BY AMPÈRE AMPÈRE, Andre-Marie. Mémoires sur l’action mutuelle de deux courans électri- ques, sur celle qui existe entre un courant électrique et un aimant ou le globe terres- tre, et celle de deux aimans l’un sur l’autre. [Paris: Feugeray, 1821]. $22,500 8vo (219 x 133mm), pp. [3], 4-112 with five folding engraved plates (a few faint scattered spots). Original pink wrappers, uncut (lacking backstrip, one cord partly broken with a few leaves just holding, slightly darkened, chip to corner of upper cov- er); modern cloth box. An untouched copy in its original state. First edition, probable first issue, extremely rare and inscribed by Ampère, of this continually evolving collection of important memoirs on electrodynamics by Ampère and others. “Ampère had originally intended the collection to contain all the articles published on his theory of electrodynamics since 1820, but as he pre- pared copy new articles on the subject continued to appear, so that the fascicles, which apparently began publication in 1821, were in a constant state of revision, with at least five versions of the collection appearing between 1821 and 1823 un- der different titles” (Norman). The collection begins with ‘Mémoires sur l’action mutuelle de deux courans électriques’, Ampère’s “first great memoir on electrody- namics” (DSB), representing his first response to the demonstration on 21 April 1820 by the Danish physicist Hans Christian Oersted (1777-1851) that electric currents create magnetic fields; this had been reported by François Arago (1786- 1853) to an astonished Académie des Sciences on 4 September. -
Saint Einstein
Christopher Jon Bjerknes THE MANUFACTURE AND SALE OF SAINT EINSTEIN Copyright © 2006. All Rights Reserved. TABLE OF CONTENTS: 1 EINSTEIN DISCOVERS HIS RACIST CALLING .................. 1.1 Introduction ................................................. 1.2 The Manufacture and Sale of St. Einstein . 1.2.1 Promoting the “Cult” of Einstein . 1.2.2 The “Jewish Press” Sanctifies a Fellow Jew . 1.3 In a Racist Era ............................................... 2 THE DESTRUCTIVE IMPACT OF RACIST JEWISH TRIBALISM ...... 2.1 Introduction ................................................. 2.2 Do Not Blaspheme the “Jewish Saint” . 2.3 Harvard University Asks a Forbidden Question . 2.4 Americans React to the Invasion of Eastern European Jews . 2.4.1 Jewish Disloyalty ........................................ 2.4.2 In Answer to the “Jewish Question” . 3 ROTHSCHILD, REX IVDÆORVM ............................. 3.1 Introduction ................................................. 3.2 Jewish Messianic Supremacism.................................. 3.3 The “Eastern Question” and the World Wars . 3.3.1 Dönmeh Crypto-Jews, The Turkish Empire and Palestine . 3.3.2 The World Wars—A Jewish Antidote to Jewish Assimilation . 3.4 Rothschild Warmongering...................................... 3.4.1 Inter-Jewish Racism ...................................... 3.4.1.1 Rothschild Power and Influence Leads to Unbearable Jewish Arrogance................................................ 3.4.1.2 Jewish Intolerance and Mass Murder of Gentiles . 3.4.2 The Messiah Myth ....................................... 3.5 Jewish Dogmatism and Control of the Press Stifles Debate . 3.5.1 Advertising Einstein in the English Speaking World . 3.5.2 Reaction to the Unprecedented Einstein Promotion . 3.5.3 The Berlin Philharmonic—The Response in Germany . 3.5.4 Jewish Hypocrisy and Double Standards . 3.6 The Messiah Rothschilds’ War on the Gentiles—and the Jews . 4 EINSTEIN THE RACIST COWARD ............................... -
Frank Schlesinger 1871-1943
NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA BIOGRAPHICAL MEMOIRS VOLUME XXIV THIRD MEMOIR BIOGRAPHICAL MEMOIR OF FRANK SCHLESINGER 1871-1943 BY DIRK BROUWER PRESENTED TO THE ACADEMY AT THE ANNUAL MEETING, 1945 FRANK SCHLESINGER 1871-1943 BY DIRK BROUWER Frank Schlesinger was born in New York City on May n, 1871. His father, William Joseph Schlesinger (1836-1880), and his mother, Mary Wagner Schlesinger (1832-1892), both natives of the German province of Silesia, had emigrated to the United States. In Silesia they had lived in neighboring vil- lages, but they did not know each other until they met in New York, in 1855, at the home of Mary's cousin. They were mar- ried in 1857 and had seven children, all of whom grew to maturity. Frank was the youngest and, after 1939, the last survivor. His father's death, in 1880, although it brought hardships to the family, was not permitted to interfere with Frank's educa- tion. He attended public school in New York City, and eventually entered the College of the City of New York, receiv- ing the degree of Bachelor of Science in 1890. His aptitude for mathematical science, already evident in grammar school, be- came more marked in the higher stages of his education when he began to show a preference for applied mathematics. Upon completing his undergraduate work it was not possible for him to continue with graduate studies. He had to support himself, and his health at that time made it desirable for him to engage in outdoor activities. -
From William Hyde Wollaston to Alexander Von Humboldt
This article was downloaded by: [Deutsches Museum] On: 15 February 2013, At: 08:42 Publisher: Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK Annals of Science Publication details, including instructions for authors and subscription information: http://www.tandfonline.com/loi/tasc20 From William Hyde Wollaston to Alexander von Humboldt - Star Spectra and Celestial Landscape Jürgen Teichmann a & Arthur Stinner b a Deutsches Museum and Ludwig-Maximilians-University, München, Germany b University of Manitoba, Winnipeg, Canada Version of record first published: 13 Feb 2013. To cite this article: Jürgen Teichmann & Arthur Stinner (2013): From William Hyde Wollaston to Alexander von Humboldt - Star Spectra and Celestial Landscape, Annals of Science, DOI:10.1080/00033790.2012.739709 To link to this article: http://dx.doi.org/10.1080/00033790.2012.739709 PLEASE SCROLL DOWN FOR ARTICLE Full terms and conditions of use: http://www.tandfonline.com/page/terms-and- conditions This article may be used for research, teaching, and private study purposes. Any substantial or systematic reproduction, redistribution, reselling, loan, sub-licensing, systematic supply, or distribution in any form to anyone is expressly forbidden. The publisher does not give any warranty express or implied or make any representation that the contents will be complete or accurate or up to date. The accuracy of any instructions, formulae, and drug doses should be independently verified with primary sources. The publisher shall not be liable for any loss, actions, claims, proceedings, demand, or costs or damages whatsoever or howsoever caused arising directly or indirectly in connection with or arising out of the use of this material.