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Chronometers and chronometry on British Voyages of Exploration, 1819-1836
DOI: 10.7488/era/1077
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Title:
Chronometers and chronometry on British Voyages of Exploration, 1819-1836
Author:
Akkermans, Emily Jane
Subjects:
chronometers
;
history of exploration
;
history of navigation
;
history of science and technology
Description:
This thesis demonstrates how a historical geography of the chronometer can inform our understanding of the production and circulation of scientific knowledge at sea. The history and development of the marine chronometer has been a topic of considerable research. Yet few studies have focused on their actual use at sea, particularly during the first half of the nineteenth century. This thesis aims to understand how officers, charged with the use and care of chronometers at sea, took up the use of these instruments and developed practices for the purpose of determining longitude at sea that would later become widespread. The thesis draws upon work in the history and historical geography of science and the history of technology and of navigational instruments to provide the context to its detailed empirical content. The thesis examines the use of chronometers on Royal Navy vessels by considering four detailed case studies of voyages and navigational practice between 1819 and 1836. These are William Edward Parry's three attempts to find a North-West Passage; William Owen's survey of the east coast of Africa, Henry Foster's scientific expedition in the Atlantic and Robert Fitzroy's survey of South America and circumnavigation. The research presents a detailed analysis of a broad range of archival material, including navigational notebooks, chronometric data books, journals, correspondence, published travel narratives and navigational manuals. The thesis pays attention to the social and institutional networks in which the users of these instruments operated, including a consideration of the role of the State, the Royal Society and the Admiralty. It considers how reforms within the Royal Navy during this period shaped the role of naval officers, who turned to scientific pursuits to further their naval careers and to their close associations with scientific societies. The thesis argues that we should not consider 'longitude by chronometer' as a single instrumental measurement easily vi achieved, but, rather as a complex interaction of instruments and methods whose manipulation invoked questions of credibility and tolerance, in the instruments and in their users. By learning and adopting observatory techniques, officers integrated chronometers and astronomical techniques into established practices of navigation. This was not achieved through straightforward textbook instruction: these skills were learnt at sea, with the help of skilled astronomers. This thesis shows that techniques of data management were transported from the observatory to the ship between ship and shore. The Royal Observatory at Greenwich aided the emergence of standardised systems of numerical reduction that were required when using large numbers of chronometers and in order to 'test' one device against the another. The thesis contributes to the history of the chronometer, the history of navigation and the history of exploration by considering how this particular instrument was used on particular voyages and how its use was shaped by the navigational practices of naval men, the aims and ambitions of astronomers, and by the limitations of the instruments themselves. The methodology pursued through the detailed examination of observational records and data workbooks affords significant new insights in the practice of science at sea in the early nineteenth century and shows how navigational knowledge derived from chronometers was constructed through agreement and negotiation.
Publisher:
University of Edinburgh
Creation Date:
2021
Language:
English
Identifier:
DOI: 10.7488/era/1077
Source:
EThOS: Electronic Theses Online Service (Full Text)
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