Since military planners must know the size and shape of the earth if they hope to track earth-orbiting satellites and to target missiles on distant lands, geodesy was an important concern of the two superpowers during the Cold War. The most important geodetic product in the United States was a series of increasingly powerful World Geodetic Systems, the first of which was published for the Department of Defense in 1960. Although WGS 60 was created because of intense international rivalries, (...) it reflected the intense rivalries between America's Army and its Air Force, and it introduced the notion of 'political geodesy'. My attention to American events does not indicate a lack of interest in the Soviet story; rather, I hope that historians with better language skills and better access to Soviet documents will examine geodetic research on the other side of the former Iron Curtain. (shrink)

Yves Simonin, a rather obscure professor of hydrography in Bayonne, submitted five scientific papers to the Paris Academy of Sciences between 1738 and 1740, which only survive in the original manuscript versions. The topics Simonin deals with in these texts are essentially three: the rectification of navigation charts of the Southern Sea, the shape of the Earth, and the heliocentric theory. Far from acknowledging Simonin's contribution to the ongoing academic debate as a valuable one, the institution systematically rejected his work. (...) In this paper, I first provide a critical analysis of Simonin's manuscripts. As I argue, their originality lies in the adoption of the perspective of a practitioner of and expert in navigational techniques. I then investigate the reasons behind the Academy's negative reception of Simonin's papers, casting light on the expertise required to participate in academic debates in the mid-18th century, and on the limits set by the institution to the possibility of external intervention. (shrink)

Caesar writes among the main preoccupations of the Druids “the measurement of the world and of territories”. A simple surveying being excluded, other methods have to be considered, and first the spotting of privileged directions from high points (such as the Puy-de-Dôme, the Montagne de Dun, the Mont Dardon, the hill of Sion-Vaudémont…) allowing a kind of primitive triangulation. It has been noticed that in the obtained patterns, the places known as Mediolanum play a major role. Thus Milano, Mediolanum of (...) the Insubri and Châteaumeillant, home of the Biturigi, can be connected by a straight line across the Mont Blanc and the Montagne de Dun, this last one being the center of several equidistances leading to Meilhan-sur-Garonne, Saintes, Évreux, all of them ancient Mediolanum. Geometrical relations, not less striking, link among others, the Mediolanum de Samoreau (landmark on the bank of the Seine) to Maulain (Haute-Marne), Mâlain (Côte‑d’Or) and Moliens (Oise). Consistant with the Celtic tradition, the sacralization of the central points adds up to a real endeavour of Gallic geodesy, the chronology of which should be elaborated. (shrink)

Derived measurements involve problems of coordination. Conducting them often requires detailed theoretical assumptions about their target, while such assumptions can lack sources of evidence that are independent from these very measurements. In this paper, I defend two claims about problems of coordination. I motivate both by a novel case study on a central measurement problem in the history of physical geodesy: the determination of the earth's ellipticity. First, I argue that the severity of problems of coordination varies according to (...) scientists' predictive and experimental control over perturbations of the measurement process. Second, I identify a methodology by which scientists can solve hard problems of coordination and gradually increase their predictive control over perturbations. I dub this methodology ‘operational pluralism’ since it is driven by the introduction of alternative measurement operations that involve different physical indicators. (shrink)

Une géodésie spatio-temporelle pervertie résulte des notions de règles et d’horloges variables, qui sont prises pour avoir leur longueur et leur rythme affectés par le champ gravitationnel. D’autre part ce que nous pourrions appeler une géodésie concrète repose sur les notions de règles et d’horloges invariables de mesure d’unité. En fait, il s’agit d’une hypothèse de base de la relativité générale. Les règles et les horloges variables conduisent à une géodésie pervertie dans le sens où un espace-temps courbe pourrait être (...) vu comme provenant du départ de l’espace-temps Minkowskien comme un effet du champ gravitationnel sur le rythme d’horloges et la longueur des règles. Dans le cas d’une géodésie concrète, nous avons « directement » un espace-temps courbe dont la courbure peut être déterminée en utilisant des règles et des horloges de mesure d’unité (invariables). Dans cet article, nous défendrons la plausibilité que le point de vue d’Einstein sur la géométrie par rapport à la relativité générale est imprégné par une géodésie pervertie. (shrink)

A perverted space-time geodesy results from the idea of variable rods and clocks, whose length and rates are taken to be affected by the gravitational field. By contrast, what we might call a concrete geodesy relies on the idea of invariable unit-measuring rods and clocks. Indeed, this is a basic assumption of general relativity. Variable rods and clocks lead to a perverted geodesy, in the sense that a curved space-time may be seen as a result of a (...) departure from the Minkowskian space-time as an effect of the gravitational field on the rate of clocks and the length of rods. In the case of a concrete geodesy, we have a curved space-time “directly”, the curvature of which can be determined using (invariable) unit-measuring rods and clocks. In this paper, we will make the case for the plausibility of the claim that Einstein’s views on geometry in relation to general relativity are permeated by a perverted geodesy. (shrink)

The difference in longitude between the observatories of Paris and Greenwich was long of fundamental importance to geodesy, navigation and timekeeping. Measured many times and by many different means since the seventeenth century, the preferred method of the later nineteenth and early twentieth centuries made use of the electric telegraph. I describe here for the first time the four Paris–Greenwich telegraphic longitude determinations made between 1854 and 1902. Despite contemporary faith in the new technique, the first was soon found (...) to be inaccurate; the second was a failure, ending in Anglo-French dispute over whose result was to be trusted; the third failed in exactly the same way; and when eventually the fourth was presented as a success, the evidence for that success was far from clear-cut. I use this as a case study in precision measurement, showing how mutual grounding between different measurement techniques, in the search for agreement between them, was an important force for change and improvement. I also show that better precision had more to do with the gradually improving methods of astronomical time determination than with the singular innovation of the telegraph, thus emphasizing the importance of what have been described as ‘observatory techniques’ to nineteenth-century practices of precision measurement. (shrink)

This article discusses the ways in which nineteenth-century geodesists reflected on precision as an epistemic virtue in their measurement practice. Physical geodesy is often understood as a quintessential nineteenth-century precision science, stimulating advances in instrument making and statistics, and generating incredible quantities of data. Throughout most of the nineteenth century, geodesists indeed pursued their most prestigious research problem – the exact determination of the earth’s polar flattening – along those lines. Treating measurement errors as random, they assumed that remaining (...) discordances could be overcome by manufacturing better instruments and extending statistical analysis to a larger amount of data. In the second half of the nineteenth century, however, several German geodesists developed sophisticated methodological critiques of their discipline, in which they diagnosed a too-narrow focus on precision among their peers. On their account, geodesists urgently needed to identify and anticipate the causes of the remaining measurement errors that arose from the earth’s little understood interior constitution. While mostly overlooked in the literature, these critiques paved the way for many empirical successes in late nineteenth- and early twentieth-century geodesy, including the first convergent measurements of the earth’s polar flattening. (shrink)

Geodesy—the determination of the size and shape of the earth—has often been the science operating at the frontier of precision in the measurement of length. Its contribution to the technologies and standards of length measurement has, however, been underestimated in the literature. That, instead, places emphasis on the on the creation and international acceptance of the metric system as a whole. By new research into the standards-in-use of the community of geodesists, I rediscover the original purpose of the Metre (...) Convention of 1875, and show for the first time the significant influence of geodesy on the standardisation of length measurement thereafter. I emphasise the role of the coherence of the web of measurement in the context of change and improvement in standards. (shrink)

Philosophers and metrologists have refuted the view that measurement’s epistemic privilege in scientific practice is explained by its theory-neutrality. Rather, they now explicitly appeal to the role that theories play in measurement. I formulate a challenge for this view: scientists sometimes ascribe epistemic privilege to measurements even if they lack a shared theory about their target quantity, which I illustrate through a case study from early geodesy. Drawing on that case, I argue that the epistemic privilege of measurement precedes (...) shared background theory and is better explained by its pre-theoretic function in enabling a distinctive kind of inquiry. (shrink)

Charles Sanders Peirce has been characterized as the greatest American philosophic genius. He is the creator of pragmatism and one of the founders of modern logic. James, Royce, Schroder, and Dewey have acknowledged their great indebtedness to him. A laboratory scientist, he made notable contributions to geodesy, astronomy, psychology, induction, probability, and scientific method. He introduced into modern philosophy the doctrine of scholastic realism, developed the concepts of chance, continuity, and objective law, and showed the philosophical significance of the (...) theory of signs and mathematical logic. The present series is the first published edition of his systematic works. (shrink)

In his new book, _Charles Peirce and Modern Science_ (2022), T. L. Short convincingly presents Charles S. Peirce as a scientific philosopher whose philosophical views were influenced by his empirical and experimental work in geodesy, astronomy, chemistry, and psychology. This includes his treatment of metaphysics, theory of categories, cosmogony, phenomenology or phaneroscopy, semiotics, and normative science. In all of his works, Peirce exemplified the spirit of modern science, not as a system builder looking for final truths, but rather as (...) a fallibilist inquirer who was always ready to refine and revise his conjectures. In these comments, it is first pointed out that there existed a European counterpart to Peirce’s scientific philosophy: the program of “inductive metaphysics,” which is today continued as “abductive metaphysis” by analytic philosophers. Peirce’s contributions to nomological probabilistic explanations are then mentioned as a complement to Short’s treatment of statistical explanation. Finally, it is argued that Short’s remarks about Peirce’s ironical relation to modernity are based on a narrow interpretation of the values and achievements of modernity. (shrink)

Charles Peirce was one of those rare individuals, an expert logician who is at the same time an experienced practical scientist. His logical acumen was apparent even to his contemporaries; while an early training in chemistry, astronomy, geodesy and optics, left him, as he declares, “saturated through and through with the spirit of the physical sciences.“ One is therefore hardly surprised to discover that he was deeply interested in scientific methodology—particularly in the logic of induction. Indeed, it would not (...) be an exaggeration to say that some of his most significant contributions to philosophy were made in precisely this field. No apology is thus required for devoting attention to them. In the present paper I want to sketch his treatment of induction very briefly, and attempt a tentative estimate of its validity. (shrink)

This book describes in detail the various theories on the shape of the Earth from classical antiquity to the present day and examines how measurements of its form and dimensions have evolved throughout this period. The origins of the notion of the sphericity of the Earth are explained, dating back to Eratosthenes and beyond, and detailed attention is paid to the struggle to establish key discoveries as part of the cultural heritage of humanity. In this context, the roles played by (...) the Catholic Church and the philosophers of the Middle Ages are scrutinized. Later contributions by such luminaries as Richer, Newton, Clairaut, Maupertuis, and Delambre are thoroughly reviewed, with exploration of the importance of mathematics in their geodetic enterprises. The culmination of progress in scientific research is the recognition that the reference figure is not a sphere but rather a geoid and that the earth’s shape is oblate. Today, satellite geodesy permits the solution of geodetic problems by means of precise measurements. Narrating this fascinating story from the very beginning not only casts light on our emerging understanding of the figure of the Earth but also offers profound insights into the broader evolution of human thought. (shrink)

In these five chapters we introduce, with significant details, the core fundamental notions of (1) deformability, (2) sound and hearing, (3) permeability and porosity, (4) viscosity, (5) immiscibility, (6) wettability, (7) gravity and geodesy, and (8) heat and thermodynamics. We then illustrate, with applications across disciplines, the importance of these notions in our lives and in understanding the world around us. These applications include the description of skyquakes and limnic eruptions, the origin of hydrocarbon accumulations underground, the description of (...) the interiors of our Moon and of Jupiter's core, the differences between near- and far-side of our Moon, vortices in oceans, gravity anomalies of Antarctica and Mars, lateral and vertical plate motions, the absence of induced earthquakes in the Bakken shale play, self-cleaning surfaces including oil spills, human thermoregulation, thermal diagnostics and therapies, bone and muscles losses during space travels, and nuclear fusion by gravitational confinement. (shrink)

François Arago, the first to show in 1810 that the surface of the Sun and stars is made of incandescent gas and not solid or liquid, was a prominent physicist of the 19th century. He used his considerable influence to help Fresnel, Ampere and others develop their ideas and make themselves known. This book covers his personal contributions to physics, astronomy, geodesy and oceanography, which are far from negligible, but insufficiently known. Arago was also an important and influential political (...) man who, for example, abolished slavery in the French colonies. One of the last humanists, he had a very broad culture and range of interests. In parallel to his biography, this title also covers the spectacular progresses of science at the time of Arago, especially in France: the birth of physical optics, electromagnetism and thermodynamics. Francois Arago's life is a fascinating epic tale that reads as a novel. (shrink)

Motivated by the recent wave of investigations on plane domain wall spacetimes with nontrivial topologies, the present paper deals with (probably) the most simple source field configuration which can generate a spatially planary symmetric static spacetime, namely a minimally coupled massless scalar field that depends only upon a spacelike coordinate. z. It is shown that the corresponding exact solutions (ℳ. g±) are algebraically special, type D-[S-3T] (in11), and represent globally pathologic spacetimes with a G4-group of motion acting on R2 × (...) R orbits. In spite of the model simplicity, these Φ-generated worlds possess naked timelike singularities (reached within a finite universal time by normal nonspacelike geodesics). are completely free of Cauchy surfaces, and contain, in the t-leveled sections, points that cannot be joined by C1-trajectory images of oblique non-spacelike geodesies. Finally, we comment on the possibility of deriving from (ℳ, g±) two other physically interesting Φ-generated” spacetimes by appropriate joining conditions in the (z=0)-plane. (shrink)

Charles Sanders Peirce (1839-1914) is known today as the first American philosopher, and as the ‘founder of pragmatism.’ Indeed, Peirce was both and much more. In a partial list of roles he played during his life, Peirce graduated as a chemist, published as an astronomer, worked in geodesy, wrote as a philosopher, and defined himself as a logician. While he gained only a partial, late recognition in his time, today the broadness of his interests is reflected by the diversity (...) of the people tha... (shrink)

In this paper it is highlighted and argued that Boscovich’s natural sciences theory is so deeply rooted in metaphysics and pervaded by it, we can maintain that it is a distinctive example of sharp-­witted, clever and far­-reaching metaphysical natural philosophy. Critically engaging with the unsubstantiated denial of metaphysics and several centuries long attempts to overcome it, I demonstrate that by metaphysical thinking Boscovich arrived at his unique notion of attractive­repulsive force and gained insight into the structure of things, by which (...) he anticipated, among other things, the theory of relativity and quantum physics. Although Boscovich greatly and successfully used quantitative methods while solving problems from geodesy, astronomy, optics, civil engineering statistics, hydraulic engineering and other fields – the most important parts of his natural sciences legacy, which made him transpose several centuries, are supported by geometric intuition and carried out mainly by qualitative methods, that is, metaphysical speculation. Also, I explain how for the creation and development of electromagnetism it was crucial to describe electromagnetic phenomena using Boscovich’s unique law of force and his theory of the structure of matter, what was explicitly stated by the ‘father of electromagnetism’ James Clerk Maxwell. Boscovich would have never reached these ideas by the exact scientific method, only by metaphysically founded and guided ‘proper thinking’. (shrink)

Charles Sanders Peirce (1839–1914) is generally acknowledged to be America's greatest philosopher, although he was never able to secure a permanent academic position and died in poverty and obscurity (see Brent 1993). He founded pragmatism, the view that a philosophical theory must be connected to practice. The pragmatic account of truth, for which he is perhaps best known, thus has it that a true belief is one which the practice of inquiry, no matter how far it were to be pursued, (...) would not improve. (See Misak 1991 for an elaboration and defense of this position.) He is also considered the founder of semiotics and was on the cutting edge of mathematical logic, probability theory, astronomy, and geodesy. (See Brent 1993 for an account of Peirce's achievements in science.). (shrink)

This paper explores the history of a unique assemblage of researchers in the geodetic and allied sciences organised at Ohio State University (OSU) in 1947 at the beginning of the Cold War. From about 1950 to 1970, the OSU geodetic sciences group was the most significant group of geodetic researchers in the world. Funded almost entirely by military and intelligence agencies, they pioneered the technologies, organised the research initiatives, ordered the data sets, and trained the generation of geodesists who eventually (...) created the Cold War Figure of the Earth to both prosecute and prevent global nuclear war. They devised elaborate mechanisms to pursue in secrecy and isolation research that had hitherto been performed collaboratively and globally. They invented methods to maintain professional associations and protocols, both to distribute-and disguise-the fruits of their geodetic research. In accomplishing this, their work also undermined the basic hypothesis of isostasy that had been foundational to geodesy for the previous century.Fundamental progress in the geosciences and military and intelligence directives were inextricably linked during the Cold War, although the extent of their convergence has been masked by the security protocols organised to disguise it. With the declassification of key programmes underway, it is now both possible and necessary to substantially revise the history of Cold War-era geosciences and their associated technologies. (shrink)

Rationality - as opposed to 'ad-hoc' - and asymptotics - to emphasize the fact that perturbative methods are at the core of the theory - are the two main concepts associated with the Rational Asymptotic Modeling (RAM) approach in fluid dynamics when the goal is to specifically provide useful models accessible to numerical simulation via high-speed computing. This approach has contributed to a fresh understanding of Newtonian fluid flow problems and has opened up new avenues for tackling real fluid flow (...) phenomena, which are known to lead to very difficult mathematical and numerical problems irrespective of turbulence. With the present scientific autobiography the author guides the reader through his somewhat non-traditional career; first discovering fluid mechanics, and then devoting more than fifty years to intense work in the field. Using both personal and general historical contexts, this account will be of benefit to anyone interested in the early and contemporary developments of an important branch of theoretical and computational fluid mechanics. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:The Cosmopolitan Peirce:The Impact of His European ExperienceJaime Nubiola, Guest EditorKeywordsCharles S. Peirce, Europe, ScienceThe common image of Charles Sanders Peirce as an isolated thinker writing in Arisbe without any contact with the world is not only historically inaccurate, but also makes it difficult to understand some key elements of his philosophy. Charles S. Peirce traveled to Europe on five different occasions. The five trips occurred between the years (...) 1870 and 1883, all of them in the service of the Coast and Geodetic Survey, at that time the chief scientific agency of the United States. Those trips—which covered a total of thirty-eight months—were a rich mixture of scientific research and tourism, of communication with other scientists and also of enjoying the artistic treasures of Europe. The impact of this extensive travelling was so relevant in Peirce’s life and thought that it makes perfect sense to identify this period of time as his “cosmopolitan period”—to use Max Fisch’s expression (Fisch 1986, 227).Peirce’s experiences of his European trips are lively reflected in his broad correspondence (professional and family letters), which until now has been unduly neglected by the scholarship, due in part to the difficulties accompanying access to it and in part to the general lack of interest from the analytic tradition in the biographical aspects of philosophy. We are convinced that the feelings that Peirce experienced in Europe were seeds which bore fruit in later years. A close study of Peirce’s letters and other documents of those years will help in avoiding a number of misunderstandings about his thought and its evolution by highlighting his active participation in the first line of several fields of cooperative scientific research (astronomy, geodesy, etc.). [End Page 425]In this issue we collect three papers presented at the 2014 Charles S. Peirce International Centennial Congress, authored respectively by Nathan Houser, Sara Barrena and myself. The first paper, written by Nathan Houser, describes how Peirce’s European experiences influenced the development of his thought and helped shape his philosophy. It appears likely that his thought was decidedly influenced by his intellectual and personal contact with European scientists and philosophers. So to understand Peirce as an American philosopher it is necessary to grasp that he was profoundly influenced by European thought and culture and to inquire how his American and European experiences worked together to form his ideas and shape him into the world-renowned philosopher he became.Sara Barrena’s paper focuses on Peirce’s aesthetics. While Peirce claims to not be well acquainted with aesthetics, he always was interested in that field. In spite of the fact that Peirce did not develop the issue in depth, aesthetics is at the foundation of the other normative sciences. Barrena suggests that the trips through Europe and the contemplation of so many works of art and of historic places left in his memory impressions that are at the basis of the importance that Peirce would assign to art and aesthetics in his later years.The final paper, by Jaime Nubiola, describes—with documental support from Peirce’s correspondence from his first and second European trips—Peirce’s conception of science as a collective and cosoperative activity of people whose lives are animated by the desire to find out the truth and by “an impulse to penetrate into the reason of things” (CP 1.44, c.1896). The paper deals with Peirce as an inventor and builder of research instruments around which scientific communities are built, and with Peirce’s own experience of cooperation in science.In sum, a close study of Peirce’s letters and other documents of his “cosmopolitan period” will help avoid certain misunderstandings about his thought and its evolution, highlighting his active participation in the first line of several fields of cooperative scientific research (astronomy, geodesy, etc.). A better understanding of Peirce’s activity in those years will provide a richer and more sympathetic approach to him, and correct that all too common but inaccurate image of Peirce as an isolated thinker.Jaime Nubiola, Guest EditorUniversidad de Navarra [email protected], Charles S. Collected Papers of Charles Sanders... (shrink)

This paper argues for continuity in purpose and specific results between some hand drawn nebulae, especially those ‘descriptive maps’ by John F. W. Herschel and E. P. Mason in the late 1830s, and the first photographs made of the nebulae in the 1880s. Using H. H. Turners’ explication in 1904 of the three great advantages of astrophotography, the paper concludes that to some extent Herschel’s and Mason’s hand-drawings of the nebulae were meant to achieve the same kinds of results. This (...) is surprising not only because such drawings were conceived and achieved over forty-years earlier, but also because the procedures used in the production of these pictorially and metrically rich images were those directly inspired by cartography, geodesy, and land-surveying. Such drawings provided the standard for what was depicted, expected and aimed at by way of successful representations of the nebulae; standards that seemed to have been used to judge the success of nebular photographs. Being conditions of expectation and possibility for later photography, these drawings were themselves made possible by such techniques of representation and measurement as isolines and triangulation, so fundamental to Imperial and ‘Humboltian science.’Keywords: Ebenezer Porter Mason; Cartography; Draughtsmanship; Observation; Scientific Representation; Philosophy of Scientific Practice. (shrink)

The development of nineteenth-century geodetic measurement challenges the dominant coherentist account of measurement success. Coherentists argue that measurements of a quantity are epistemically successful if their numerical outcomes converge across varying contextual constraints. Aiming at numerical convergence, in turn, offers an operational aim for scientists to solve problems of coordination. Geodesists faced such a problem of coordination between two indicators of the earth’s ellipticity, which were both based on imperfect ellipsoid models. While not achieving numerical convergence, their measurements produced novel (...) data that grounded valuable theoretical hypotheses. Consequently, they ought to be regarded as epistemically successful. This insight warrants a dynamic revision of coherentism, allowing to judge the success of a metric based on both its coherence and fruitfulness. On that view, scientific measurement aims to coordinate theoretical definitions and produce novel data and theoretical insights. (shrink)

This paper reconstructs the history of the trigonometrical surveying of Kashmir from 1855 to 1865. It highlights the strategies through which surveyors had to justify the employment of high-precision instruments and methods in Himalayan terrain. Only by tediously manipulating their institutional environment in India and Britain did the staff of the Kashmir survey manage to complete its operations in light of constant financial and physical hardship. To sustain their measurements, surveyors aligned themselves with various political projects, entertaining and shifting allegiances (...) with local rulers, scientific societies, and colonial institutions. After suffering severe cuts to instruments and assistance staff, the party was entirely stripped of funds by the East India Company in 1857 and relied on the material support of Maharaja Gulab Singh. Subsequently, surveyors adopted an expansionist rhetoric to gather the support of the Royal Geographical Society. In doing so, they framed precision as an essential contribution to imperial expansion, effective colonial rule, and intervention in ‘backward’ Kashmiri society and infrastructure. The Kashmir survey illustrates that rendering precision valuable requires an ongoing performative effort of justification to align epistemic with political and institutional interests. (shrink)