Article James Croll – Aman‘Greater Far Than His Work’ Kevin J
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So6 NATURE (SEPTEMBER 22, T904
so6 NATURE (SEPTEMBER 22, t904 Is Selenium Radio-active? THE HEART OF SKYE.' lT occurred to me recently that a possible ·method of deciding between the two hypotheses which have been THIS volume of detailed rock-description, raising brought forward to explain radio-activity, namely, that of in its successive chapters questions of profound atomic degradation (Rutherford and Soddy, Ramsay, &c.) interest in philosophic geology, proves that the Geo and that of molecular change (Armstrong and Lowry, Proc. logical Survey of the United Kingdom is confident Roy. Soc., 1903), lay in attempting to realise radio-activity that the scientific spirit should permeate its public in the case of an element well known to undergo molecular work. None of the rocks dealt with possesses at pre change readily, but with an atomic weight small enough sent an economic value; most of the area is untraversed to exclude the probability of an atomic instability such as by roads, and the exposures are not to be sought in is assumed for radium and thorium. Such an element is quarries, but in rain-swept uplands, or high on selenium (at. wt. .79), which suggested itself to me as a desolate mountain-walls. Yet no detail is regarded suitable material to experiment with because, under the as unimportant; the surveyor, for months together, influence of light, it undergoes a remarkable alteration in its electrical resistance and E.M.F. of contact, suggesting leads a life as hard and remote as that of an Alaskatt an allotropic change of an altogether unusual character. pioneer; and the result is a book in which the daily As this change, whatever be its real nature, occurs almost difficulties are concealed, while an array of facts is instantaneously (Bellati and Romanese, A tti R. -
Identifying the Causal Role of CO2 During the Ice Ages
Identifying the Causal Role of CO2 during the Ice Ages Jennifer L. Castle and David F. Hendry∗ Institute for New Economic Thinking at the Oxford Martin School and Climate Econometrics at Nuffield College, University of Oxford January 13, 2020 Abstract We investigate past climate variability over the Ice Ages, where a simultaneous-equations system is developed to characterize land ice volume, temperature and atmospheric CO2 levels as non-linear functions of measures of the Earth’s orbital path round the Sun. Although the orbital variables were first theorised as the fundamental causes of glacial variation by Croll in 1875 following Agassiz’s conception of a ‘Great Ice Age’ in 1840, their minor variations were thought insufficient to drive such major changes, especially the relative rapidity of shifts between glacial and warmer periods. The changes over the ice ages in atmospheric CO2 closely matched changes in land ice volumes, and since temperature changes are in turn affected by CO2 and also closely tracked ice volumes, a key identification issue is the causal role of CO2 in the process. As any links between CO2 and temperature above the forces from the orbital drivers (which of course are still operating) must have been natural ones hundreds of thousands of years ago, understanding their interactions at that time is important now that additional CO2 emissions are anthropogenic. We develop a simultaneous equation system over the last 800,000 years that allows a test of the role of CO2 as endogenously driven by the orbital variations, or an ‘exogenous’ influence as it now is. JEL classifications: C01, C51, C87, Q54. -
The Observer October 2015
Santa Monica Amateur Astronomy Club October, 2015 The Observer UPCOMING CLUB MEETING: FRIDAY, OCTOBER 9, 7:30 PM Santa Moncia Featured Speaker: DEBORAH VANE, JPL Amateur Astronomy Club Topic: “Observing Earth From Space To Understand and Better Predict INSIDE THIS ISSUE Climate Change” October Calendar: A Busy Month! ************** Earth’s Climate: Milankovitch and his Cycles OUR MEETING SITE: Wildwood School 11811 Olympic Blvd. Our knowledge of the earth's ecosystems has been dramatically ad- Los Angeles, CA 90064 vanced by observations from space. NASA now has a suite of satellites observing our atmosphere, oceans and weather systems. Many of these Free parking in garage, SE satellites are built and operated nearby, at NASA's Jet Propulsion Labora- corner of Mississippi tory. &Westgate. Deborah Vane, our featured speaker, has worked on the Mars Viking Lander Mission Imaging Team, and has served as Scientific Assis- “The Observer” would be tant for the JPL Chief Scientist. As mission manager for Cloudsat, she delighted to accept submis- has been involved with climate observations from space. At this Friday's sions from club members. meeting, she will tell us how these observations are helping us to better Co-editors would also be understand our planet's climate--and its potential for change in the com- welcome. See one of our club ing years." officers at the next meeting! Observing Earth from Space: NASA has a whole fleet of spacecraft, including a line-up of advanced satellites collectively known as “The A Team”, orbiting the earth and collecting infor- mation about land use, atmospheric composition, ocean winds and currents, sea surface temperatures, and cloud formation. -
Sir Charles Lyell and the Species Question
Sigma Xi, The Scientific Research Society Sir Charles Lyell and the Species Question: Lyell's reflections on species reveal the gathering crisis in science after 1850 brought about by fossil discoveries, growing knowledge of geographical distribution, and the ideas of Darwin and Wallace Author(s): Leonard G. Wilson Reviewed work(s): Source: American Scientist, Vol. 59, No. 1 (January–February 1971), pp. 43-55 Published by: Sigma Xi, The Scientific Research Society Stable URL: http://www.jstor.org/stable/27829436 . Accessed: 12/12/2012 22:22 Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at . http://www.jstor.org/page/info/about/policies/terms.jsp . JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact [email protected]. Sigma Xi, The Scientific Research Society is collaborating with JSTOR to digitize, preserve and extend access to American Scientist. http://www.jstor.org This content downloaded on Wed, 12 Dec 2012 22:22:44 PM All use subject to JSTOR Terms and Conditions Leonard G. Wilson Sir Charles Lyell and the Species Question LyelVs reflectionson species reveal the gathering crisis in science after 1850 broughtabout byfossil discoveries, growingknowledge of geographical distribution, and the ideas ofDarwin and Wallace Ever since 1832 when, in the second volume of his Principles of Geology (7), he had discussed Lamarck's theory with devastating criticism, Sir Charles Lyell had been committed to the view that species were real and stable entities that might be driven to ex tinction but could not be altered. -
Archibald Geikie (1835–1924): a Pioneer Scottish Geologist, Teacher, and Writer
ROCK STARS Archibald Geikie (1835–1924): A Pioneer Scottish Geologist, Teacher, and Writer Rasoul Sorkhabi, University of Utah, Salt Lake City, Utah 84108, USA; [email protected] years later, but there he learned how to write reports. Meanwhile, he read every geology book he could find, including John Playfair’s Illustrations of the Huttonian Theory, Henry de la Beche’s Geological Manual, Charles Lyell’s Principles of Geology, and Hugh Miller’s The Old Red Sandstone. BECOMING A GEOLOGIST In the summer of 1851, while the Great Exhibition in London was attracting so many people, Geikie decided instead to visit the Island of Arran in the Clyde estuary and study its geology, aided by a brief report by Andrew Ramsay of the British Geological Survey. Geikie came back with a report titled “Three weeks in Arran by a young geologist,” published that year in the Edinburgh News. This report impressed Hugh Miller so much that the renowned geologist invited its young author to discuss geology over a cup of tea. Miller became Geikie’s first mentor. In this period, Geikie became acquainted with local scientists and pri- vately studied chemistry, mineralogy, and geology under Scottish naturalists, such as George Wilson, Robert Chambers, John Fleming, James Forbes, and Andrew Ramsay—to whom he con- fessed his desire to join the Geological Survey. In 1853, Geikie visited the islands of Skye and Pabba off the coast Figure 1. Archibald Geikie as a young geolo- of Scotland and reported his observations of rich geology, including gist in Edinburgh. (Photo courtesy of the British Geological Survey, probably taken in finds of Liassic fossils. -
Palaeolithic Continental Europe
World Archaeology at the Pitt Rivers Museum: A Characterization edited by Dan Hicks and Alice Stevenson, Archaeopress 2013, page 216-239 10 Palaeolithic Continental Europe Alison Roberts 10.1 Introduction The collection of Palaeolithic material from Continental Europe in the Pitt Rivers Museum (PRM) is almost of equivalent size to the collection from the British Isles (see Chapter 9), but is not nearly as well known or as well published. It consists mainly of material from France that seems to have been an under-acknowledged highlight of the PRM archaeological collections for most of the 20th century. Despite the obvious care with which French Palaeolithic material was acquired by the museum, especially during the curatorship of Henry Balfour, the collection has mainly been used for teaching and display, rather than as a research resource. Due to the historic lack of work on the collection so far, this chapter presents a preliminary overview, to orient and inform future research, rather than a full account of the collections. The exact numbers of Palaeolithic objects from Europe are difficult to state with certainty due to factors such as unquantified batch registration of groups of objects in the past, and missing or incorrect cultural attributions in the documentation. However, it is estimated that there are c. 3,760 Palaeolithic objects from continental Europe in the PRM, c. 534 of which are from the founding collection of the PRM (PRMFC)(1). The majority of the material comprises c. 3,585 objects from France (Figure 10.1), with smaller collections from Belgium (c. 63 objects), Italy (c. -
George P. Merrill Collection, Circa 1800-1930 and Undated
George P. Merrill Collection, circa 1800-1930 and undated Finding aid prepared by Smithsonian Institution Archives Smithsonian Institution Archives Washington, D.C. Contact us at [email protected] Table of Contents Collection Overview ........................................................................................................ 1 Administrative Information .............................................................................................. 1 Historical Note.................................................................................................................. 1 Descriptive Entry.............................................................................................................. 2 Names and Subjects ...................................................................................................... 3 Container Listing ............................................................................................................. 4 Series 1: PHOTOGRAPHS, CORRESPONDENCE AND RELATED MATERIAL CONCERNING INDIVIDUAL GEOLOGISTS AND SCIENTISTS, CIRCA 1800-1920................................................................................................................. 4 Series 2: PHOTOGRAPHS OF GROUPS OF GEOLOGISTS, SCIENTISTS AND SMITHSONIAN STAFF, CIRCA 1860-1930........................................................... 30 Series 3: PHOTOGRAPHS OF THE UNITED STATES GEOLOGICAL AND GEOGRAPHICAL SURVEY OF THE TERRITORIES (HAYDEN SURVEYS), CIRCA 1871-1877.............................................................................................................. -
Editorial This Issue Contains a Profile of John Stevens Henslow, Darwin’S Cambridge Friend and Mentor (Page 4)
THE LINNEAN 1 Editorial This issue contains a profile of John Stevens Henslow, Darwin’s Cambridge friend and mentor (page 4). Henslow was not only responsible for Darwin’s appointment to HMS Beagle but also arranged to receive all tlie collected material shipped home to Cambridge. Moreover at the conclusion of the voyage he arranged for Darwin to be given a Treasury grant of &I,000 towards the publication of his zoological fiiidings. During the entire five years of the Beagle s voyage, Henslow corresponded with Darwin proffering advice and guidance and later publishing some of Darwin’s geological observations in the Cambridge Philosophical Society Proceedings.’ Darwin’s great debt of gratitude to Henslow is quite apparent from the tone of his letters to his old tutor: “I always like advice from you, and no one whom I have the luck to know is more capable of giving it than yourself. Recollect, when you write, that I am a sort ofprotkgge‘of yours, and that it is your bounden duty to lecture me.” (Devonport, Dec. 3 1831) “I will say farewell, till the day arrives when I shall see my Master in Natural History and can tell him how grateful I feel for his kindness and friendship.” (Sydney, Jan. 1836) And then when telling Henslow about his geological specimens: “My dear Henslow, I do long to see you, you have been the kindest friend to me that ever man possessed.” (Shrewsbury, Oct. 6 1836) The year after the Beagle ’s return Henslow was appointed rector of Hitcham, Suffolk (1837) and from that point onwards as Darwin noted: “he cared somewhat less about science and more for his parishioners.” Finally, in the last year of his life, Henslow came to the assistance of his student one last time by acting as Chairman of the 1860 British Association meeting at which Huxley (and Hooker and Lubbock) took up the cudgel on Darwin’s behalf. -
Newsletter of the History of Geology Group of the Geological Society
HOGG Newsletter of the History of Geology Group of The Geological Society Number 68 February 2020 Front cover WILLIAM AUGUSTUS EDMOND USSHER (1849‒1920), the centenary of whose death is remembered this year. Born in County Galway, Ireland in 1849, Ussher joined the Geological Survey of Great Britain (now British Geological Survey) in 1868 and spent his whole career (retiring in 1909) as a field and mapping surveyor. He is best known for his work in the south-west of England (Cornwall, Devon, Somerset), particularly his work on the Devonian, Carboniferous and Triassic strata. In 1894, he was awarded the Geological Society’s Murchison Medal. Many Survey maps and memoirs bear his name as does the Ussher Society founded in 1962 as a focus for geological research in south-west England. Originally published under the title Proceedings of the Ussher Society, its journal was renamed Geoscience in South-West England in 1998. Sources Anon. 1920. Obituary of Mr W. A. E. Ussher. Nature, 105, 144. Anon [R. D. Oldham] 1921. Obituary Proceedings of the Geological Society in Quarterly Journal of the Geological Society, 77, lxxiii‒lxxiv. British Geological Survey. https://www.bgs.ac.uk/discoveringGeology/geologyOfBritain/archives/pioneers/pioneers.cfc?method=search ¤tTab=tab_U Burt, E. 2013. W. A. E. Ussher: an insight into his life and character. Geoscience in South-West England, 13, 165‒171. Dineley, D. L. 1974. W. A. E. Ussher: his work in the south-west. Proceedings of the Ussher Society, 3, 189‒201. House, M. R. 1978. W. A. E. Ussher: his ancestral background. Proceedings of the Ussher Society, 4, 115‒118. -
James Hutton's Reputation Among Geologists in the Late Eighteenth and Nineteenth Centuries
The Geological Society of America Memoir 216 Revising the Revisions: James Hutton’s Reputation among Geologists in the Late Eighteenth and Nineteenth Centuries A. M. Celâl Şengör* İTÜ Avrasya Yerbilimleri Enstitüsü ve Maden Fakültesi, Jeoloji Bölümü, Ayazağa 34469 İstanbul, Turkey ABSTRACT A recent fad in the historiography of geology is to consider the Scottish polymath James Hutton’s Theory of the Earth the last of the “theories of the earth” genre of publications that had begun developing in the seventeenth century and to regard it as something behind the times already in the late eighteenth century and which was subsequently remembered only because some later geologists, particularly Hutton’s countryman Sir Archibald Geikie, found it convenient to represent it as a precursor of the prevailing opinions of the day. By contrast, the available documentation, pub- lished and unpublished, shows that Hutton’s theory was considered as something completely new by his contemporaries, very different from anything that preceded it, whether they agreed with him or not, and that it was widely discussed both in his own country and abroad—from St. Petersburg through Europe to New York. By the end of the third decade in the nineteenth century, many very respectable geologists began seeing in him “the father of modern geology” even before Sir Archibald was born (in 1835). Before long, even popular books on geology and general encyclopedias began spreading the same conviction. A review of the geological literature of the late eighteenth and the nineteenth centuries shows that Hutton was not only remembered, but his ideas were in fact considered part of the current science and discussed accord- ingly. -
Philosophical Transactions (A)
INDEX TO THE PHILOSOPHICAL TRANSACTIONS (A) FOR THE YEAR 1889. A. A bney (W. de W.). Total Eclipse of the San observed at Caroline Island, on 6th May, 1883, 119. A bney (W. de W.) and T horpe (T. E.). On the Determination of the Photometric Intensity of the Coronal Light during the Solar Eclipse of August 28-29, 1886, 363. Alcohol, a study of the thermal properties of propyl, 137 (see R amsay and Y oung). Archer (R. H.). Observations made by Newcomb’s Method on the Visibility of Extension of the Coronal Streamers at Hog Island, Grenada, Eclipse of August 28-29, 1886, 382. Atomic weight of gold, revision of the, 395 (see Mallet). B. B oys (C. V.). The Radio-Micrometer, 159. B ryan (G. H.). The Waves on a Rotating Liquid Spheroid of Finite Ellipticity, 187. C. Conroy (Sir J.). Some Observations on the Amount of Light Reflected and Transmitted by Certain 'Kinds of Glass, 245. Corona, on the photographs of the, obtained at Prickly Point and Carriacou Island, total solar eclipse, August 29, 1886, 347 (see W esley). Coronal light, on the determination of the, during the solar eclipse of August 28-29, 1886, 363 (see Abney and Thorpe). Coronal streamers, observations made by Newcomb’s Method on the Visibility of, Eclipse of August 28-29, 1886, 382 (see A rcher). Cosmogony, on the mechanical conditions of a swarm of meteorites, and on theories of, 1 (see Darwin). Currents induced in a spherical conductor by variation of an external magnetic potential, 513 (see Lamb). 520 INDEX. -
Article Cosmic Connections: James Croll's Influence on His
Earth and Environmental Science Transactions of the Royal Society of Edinburgh,1–6, 2021 Article Cosmic connections: James Croll’sinfluence on his contemporaries and his successors James R. FLEMING Science, Technology, and Society Program, Colby College, Waterville, Maine 04358, USA. Email: jfl[email protected] ABSTRACT: This paper examines the astronomical theory of ice ages of James Croll (1821–1890), its influence on contemporaries John Tyndall, Charles Lyell, and Charles Darwin, and the subsequent development of climate change science, giving special attention to the work of Svante Arrhenius, Nils Ekholm, and G. S. Callendar (for the carbon dioxide theory), and Milutin Milanković(for the astro- nomical theory). Croll’s insight that the orbital elements triggered feedbacks leading to complex changes – in seasonality, ocean currents, ice sheets, radiative forcing, plant and animal life, and climate in general – placed his theory of the Glacial Epoch at the nexus of astronomy, terrestrial physics, and geology. He referred to climate change as the most important problem in terrestrial physics, and the one which will ultimately prove the most far reaching in its consequences. He was an autodidact deeply involved in philosophy and an early proponent of what came to be called ‘cosmic physics’–later known as ‘Earth-system science.’ Croll opened up new dimensions of the ‘climate controversy’ that continue today in the interplay of geological and human influences on climate. KEY WORDS: astronomical theory, carbon dioxide theory, climate change, cosmic physics, ice ages. It is to be hoped that the day is not far distant when the G. S. Callendar (for the carbon dioxide theory), and Milutin climate controversy will be concluded.