Notes on the Management of Chronometers and the Measurement of Meridian Distances.
Notes on the Management of Chronometers and the Measurement of Meridian Distances.
Notes on the Management of Chronometers and the Measurement of Meridian Distances.
Notes on the Management of Chronometers and the Measurement of Meridian Distances.

Notes on the Management of Chronometers and the Measurement of Meridian Distances.

London: J.D. Potter, 1861.

Octavo, xvi, 228 pp., including appendices and tables.

The chronometers of HMS Fly, by an officer on board

New edition, revised and considerably expanded. The work includes important statistical tables from the north Australian survey conducted by HMS Fly under the command of Francis Blackwood between 1842-1846: the author, Shadwell, served on the Australian Station on Fly, which is why many of the concrete examples he uses here derive from that voyage, but he also consulted all manner of other sources, among which the appendix to the Beagle voyage was clearly uppermost.

New edition, revised and considerably expanded. The work includes important statistical tables from the north Australian survey conducted by HMS Fly under the command of Francis Blackwood between 1842-1846: the author, Shadwell, served on the Australian Station on Fly, which is why many of the concrete examples he uses here derive from that voyage, but he also consulted all manner of other sources, among which the appendix to the Beagle voyage was clearly uppermost.

The accuracy of the bearings obtained during the Fly survey were clearly considered first rate for inclusion in this book. Indeed, modern charts of the Barrier Reef and Coral Sea still bear some of Blackwood's sailing directions. The voyage of the Fly heralded a new era of exactitude for the publication of Admiralty charts, and Ingleton comments that 'the expedition was noteworthy for being the first to be despatched to Australia on a purely surveying mission'. Furthermore, scientific information gleaned during the voyage was most informative in an era when the formation of coral reefs attracted the curiosity of brilliant naturalists such as Charles Darwin and Alfred Wallace.

The preface states this edition has been expanded by some 70 pages, and includes vital information derived from the Recherches Chronométriques published by the Ministry of the Marine in Paris.

Ingleton, 'Charting a Continent', pp. 61-66.

Price (AUD): $925.00  other currencies     Ref: #4402900

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