Managing precision: how to use chronometers accurately at sea.

Marine chronometers, often considered precision instruments, proliferated in navigational practices during the nineteenth century. This paper examines their use in the hands of naval officers in the early-nineteenth century. It argues that both the instruments and their operators required careful management and regulation. In addition, officers learnt and adapted observatory practices relating to the process of data collection and management. Through these means, chronometric data was collected, organized, and reduced to negotiate accurate results.

At the ends of the line: How the Airy Transit Circle was gradually overshadowed by the Greenwich Prime Meridian.

The Greenwich Prime Meridian is one of the iconic features of the Royal Museums Greenwich. Visitors to the Museum even queue up to pose with one leg on either side of the Line. Yet, the Airy Transit Circle, the instrument that defined the meridian, is almost always excluded from these photographs. This paper examines how the instrument has become hidden in plain sight within the stories of Greenwich Time and Greenwich Meridian, as well as within the public imagination, by providing an analysis of the instrument's transformation from a working astronomical instrument to a museum object. The paper highlights the gradual decoupling of the instrument from narratives of Time and Longitude, which resulted in the Line's popularity overshadowing the instrument that defined it. By doing so, the paper aims at showing the symbiotic relationship between the materiality of the instrument and the meridian line that it defined. Approaching the instrument through the lenses of object biographies, the paper raises the question of whether the life of the instrument came to an end once operations with it were terminated. The analysis of the Transit Circle's life reveals that it reached its end multiple times, which shifts the emphasis away from a single and ultimate end of scientific objects to a process of gradual downfall, during which they can "end" several times. In addition, through the object biography approach, the Transit Circle no longer appears as a dead object reaching an afterlife within a museum setting. Instead, the approach demonstrates that, though the instrument can still be restored to an operational order, doubts about its accuracy, and its relevancy to today's astronomical methods, have led the instrument to be considered obsolete, transforming it into a museum object on display.

El laboratorio de la aduana de Valencia: fiscalidad, análisis químicos y patrimonio portuario (1927-1937) / The laboratory of the customs of Valencia: taxation, chemical analysis and port heritage (1927-1937)

Este artículo estudia el laboratorio aduanero de Valencia, un espacio situado en la frontera entre la química y la economía. Dependiente del Ministerio de Hacienda y situado en la aduana del puerto valenciano formaba parte de una red de laboratorios fiscales regio-nales creados en la década de 1920. El laboratorio no se limitó al reconocimiento y análisis de mercancías para mejorar la recaudación arancelaria, sino que se convirtió en un espacio útil en su entorno local. El artículo explora cómo fue creado e instalado en el puerto, así como su relación con otros inspectores portuarios. También se analizan sus actividades principales y sus primeros expertos. Finalmente, se estudia con detalle el patrimonio y la cultura material del laboratorio para conocer mejor el tipo de análisis realizados y las conexiones creadas con el resto de dependencias aduaneras, y con los comerciantes e industriales del puerto y la ciudad (AU)

Current situation and sharing mode of large-scale scientific instruments in specialized laboratories of general hospitals / 中华医学科研管理杂志

Objective:Explore the open sharing mode of large-scale scientific instruments in specialized laboratories, consider how to effectively improve the use efficiency of instruments.Methods:Based on the analysis of the problems existing in the management of large scientific instruments in specialized laboratories of a general hospital, the open sharing platform of specialized laboratory instruments was constructed with the help of laboratory information management system, and relevant management suggestions and thoughts were put forward.Results:Depending on the system design, specialized laboratories can use the instrument sharing platform to implement the " special management sharing" of large scientific instruments and improve the efficiency of instrument use.Conclusions:The construction of large scientific research instrument sharing platform for specialized laboratories in general hospitals is an effective means to solve the instrument management problems in specialized laboratories at present, but to give full play to the effect, it is necessary to constantly improve the platform system construction and technical personnel training.

Economic savings for scientific free and open source technology: A review.

Both the free and open source software (FOSS) as well as the distributed digital manufacturing of free and open source hardware (FOSH) has shown particular promise among scientists for developing custom scientific tools. Early research found substantial economic savings for these technologies, but as the open source design paradigm has grown by orders of magnitude it is possible that the savings observed in the early work was isolated to special cases. Today there are examples of open source technology for science in the vast majority of disciplines and several resources dedicated specifically to publishing them. Do the tremendous economic savings observed earlier hold today? To answer that question, this study evaluates free and open source technologies in the two repositories compared to proprietary functionally-equivalent tools as a function of their use of Arduino-based electronics, RepRap-class 3-D printing, as well as the combination of the two. The results of the review find overwhelming evidence for a wide range of scientific tools, that open source technologies provide economic savings of 87% compared to equivalent or lesser proprietary tools. These economic savings increased slightly to 89% for those that used Arduino technology and even more to 92% for those that used RepRap-class 3-D printing. Combining both Arduino and 3-D printing the savings averaged 94% for free and open source tools over commercial equivalents. The results provide strong evidence for financial support of open source hardware and software development for the sciences. Given the overwhelming economic advantages of free and open source technologies, it appears financially responsible to divert funding of proprietary scientific tools and their development in favor of FOSH. Policies were outlined that provide nations with a template for strategically harvesting the opportunities provided by the free and open source paradigm.

Becoming Eusapia: The rise of the "Diva of Scientists".

Eusapia Palladino (1854-1918) is remembered as one of the most famous mediums in the history of spiritualism. Renowned scientists attended her séances in Europe and in the United States. They often had to admit to being unable to understand the origin of the phenomena produced. Cesare Lombroso, for example, after meeting Eusapia, was converted first to mediumism, then spiritualism. This article will retrace the early stages of her career as a medium and shed light on the way she managed to gain the attention of scientists. It will also show why they chose her as an epistemic object.

German Empire historical scientific displays and the formation of the history of science discipline.

The history of science as a discipline took place in the period of the German Empire, but the historiography of its development insufficiently recognizes both its proto-institutionalization during this period and the critical role played by Germans in effecting its initial development. In this article, while alluding to the several areas in which Germans took the lead in establishing the discipline, the focus is on one representative area: the mounting of temporary and permanent exhibitions relating to the history of science during the Empire period. Reasons why Germans were motivators in these efforts include the importance of past and present excellence in science, eminence in and fascination with historical research to the new nation's construction after German unification in 1871, and of the assertion of the nineteenth century German bourgeoisie in its role in advancing the culture of the nation. The larger argument, that subjects of the German Empire achieved critical institution-building in history of science, is supported by the incidence of displays organized by Germans, and buttressed by the fact that a number of these organizers also participated in the field's enlarged late nineteenth and early twentieth century scholarship that was most marked among Germans of any national group.

An 'experimental' instrument: testing the torsion balance in Britain, Canada and Australia.

The torsion balance, an instrument that was first developed to demonstrate the high precision of physical science in the laboratory became a different sort of demonstration instrument in its brief vogue in the 1920s. This article considers intersecting stories of acquiring and testing the torsion balance as a field instrument in Canada, Britain and Australia. It examines the purchasing trip and fieldwork of A. H. Miller of the Dominion Observatory in 1928-1931, testing conducted by the British Geological Survey in 1926-1930, and finally the Imperial Geophysical Experimental Survey of 1928-1930 in Australia. These different stories produce a kind of collective biography, illustrating well the variety of material and textual records that accrete around instruments, especially expensive ones. But the trials and travels of the torsion balance also point to large themes. By comparing the different ways an instrument becomes valuable, and to whom, these micro-histories reveal significant features of the developing identity of geophysics. They also show the interaction of different forms of scientific internationalism in the inter-war period.

State of the field: Paper tools.

Paper occupies a special place in histories of knowledge. It is the substrate of communication, the stuff of archives, the bearer of marks that make worlds. For the early-modern period in particular we now have a wealth of studies of 'paper tools', of the ways in which archives were assembled and put to use, of the making of lists and transcribing of observations, and so on. In other fields, too, attention has turned to the materiality of information. How far is it possible to draw a stable methodology out of the insights of literary and book historians, bibliographers, anthropologists, and those working in media studies? Do these diverse fields in fact refer to the same thing when they talk of paper, its qualities, affordances and limitations? In attempting to answer these questions, the present essay begins in the rich territory of early-modern natural philosophy - but from there opens out to take in recent works in a range of disciplines. Attending to the specific qualities of paper is only possible, I argue, if it is understood that paper can be both transparent and opaque depending on the social world it inhabits and helps to constitute. Paper flickers into and out of view, and it is precisely this quality that constitutes its sociomateriality.

James Gregory, the University observatory and the early acquisition of scientific instruments at the University of St Andrews.

James Gregory, inventor of the reflecting telescope and Fellow of the Royal Society, was the first Regius Professor of Mathematics of the University of St Andrews, 1668-74. He attempted to establish in St Andrews what would, if completed, have been the first purpose-built observatory in the British Isles. He travelled to London in 1673 to purchase instruments for equipping the observatory and improving the teaching and study of natural philosophy and mathematics in the university, seeking the advice of John Flamsteed, later the first Astronomer Royal. This paper considers the observatory initiative and the early acquisition of instruments at the University of St Andrews, with reference to Gregory's correspondence, inventories made ca. 1699-ca. 1718 and extant instruments themselves, some of which predate Gregory's time. It examines the structure and fate of the university observatory, the legacy of Gregory's teaching and endeavours, and the meridian line laid down in 1748 in the University Library.

Crânios, corpos e medidas: a constituição do acervo de instrumentos antropométricos do Museu Nacional na passagem do século XIX para o XX / Crania, bodies, and measurements: formation of the collection of anthropometric instruments at the Museu Nacional in the late nineteenth/early twentieth century

Aborda o processo de constituição do acervo de instrumentos científicos do Setor de Antropologia Biológica (antiga Divisão de Antropologia Física) do Museu Nacional. Prioriza-se a análise da coleção de instrumentos de antropometria. Pensar o instrumental de medição antropométrica relacionando-o com as demais coleções do acervo de antropologia biológica e com a atuação dos pesquisadores do Museu Nacional, em seus respectivos contextos sociopolíticos e acadêmicos, oferece uma visão privilegiada do panorama científico na passagem do século XIX para o XX.

Analyzes the formation of the collection of scientific instruments at the Museu Nacional's Biological Anthropology Sector (previously known as the Physical Anthropology Division), Brazil. It focuses on the instruments used for anthropometric measurements. By drawing relations between this collection and other of the institution's biological anthropology collections, as well as the activities of Museu Nacional researchers within their sociopolitical and academic contexts, we arrive at a privileged view of the scientific methods and theories in use in the final decades of the nineteenth century and beginning of the twentieth.