The Rise and Decline of England's Watchmaking Industry, 1550–1930

Davies, Alun C.

doi:10.4324/9781003227823

Cited by 3 publications

(3 citation statements)

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“…The Great Trigonometrical Survey of India started in 1802 and continued for more than 70 years. Although permanent observatories were eventually established to service the Survey's theodolites and rate the box chronometers, they replaced the tent observatories that had initially been used to establish the lay of the land (Davies, 2022). Halfway around the world, in 1803 United States' President Thomas Jefferson (1743-1826) had purchased the Louisiana territory from France, which nearly doubled the area of the new United States.…”

Section: Focus Shiftmentioning

confidence: 99%

“…The surveyors planned to determine the longitudes of the locations they passed through using the lunar distance method, employing an equatorial telescope (which compensates for the Earth's rotation; for an example, see Figure 10) sited in an observatory tent. However, Lewis decided to bring along his own Arnold chronometer to more efficiently facilitate these geographic position determinations (Davies, 2022). Tent observatories in support of astronomical observations to determine longitudes and latitudes were in continuous use in the United States for several decades thence.…”

Section: Focus Shiftmentioning

confidence: 99%

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Sydney's Scientific Beginnings: William Dawes' Observatories in Context

Grijs¹,

Jacobs²

2021

J. Astron. Hist. Herit.

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Between the mid-eighteenth and mid-nineteenth centuries, long-haul oceanic voyages of exploration and discovery routinely carried astronomical tent observatories to support land-based longitude determinations using heavy and cumbersome astronomical regulators and transit telescopes. Following James Cook's deployment of a pilot tent observatory on his first voyage to the Pacific in 1768-1771, the tent design was altered by William Bayly for more convenient use on Cook's second and third voyages to the Pacific. Bayly's design became the standard structure of tent observatories assigned to shipboard astronomers during the Age of Sail. By the middle of the nineteenth century, a subtle shift in focus had occurred, with tent observatories now being deployed to observe specific celestial events (such as the 1882 Venus transit or a variety of eclipses), while longitude determinations increasingly relied on the novel, compact and improved box chronometers of the day. A further shift in the application of tent observatories occurred towards the end of the nineteenth century, when astronomical applications largely gave way to a renewed focus on meteorological measurements.

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Section: Focus Shiftmentioning

confidence: 99%

Section: Focus Shiftmentioning

confidence: 99%

Sydney's Scientific Beginnings: William Dawes' Observatories in Context

Grijs¹,

Jacobs²

2021

J. Astron. Hist. Herit.

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“…Development in clocks has experienced different ranges of evolution and advancement. These range from the discovery of the sundial, the water clock, the pendulum clock, the mechanical clock, and the spring-driven clock to the digital clock and of lately the atomic clock (Davies, 2022). A clock with a digital time base that typically operates on frequency pulses is known as a digital clock (usually 1Hz) (Perotoni et al, 2022).…”

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confidence: 99%

Development of a Compact and Accurate Auto-Update Digital Clock with Real-Time Location Display using Organic Light Emitting Diode and Crystal Oscillator

Akanni¹,

Abdulrasaq²,

Isa³

et al. 2022

jasem

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Research has been going on for a lengthy time on digital clocks but with restraints to auto-updating based totally on location. The objective of the paper is to produce a portable and accurate auto-update digital watch (clock) that shows the real time and the current location of the user with the aid of crystal oscillator to generate clock pulses which interfaced with the GPS modules with organic light-emitting diode (OELD). The system was able to automatically update the co-ordinate of locations whenever the user moves from one place to another, It also auto-update time whenever the battery is removed and reinserted or when switched OFF and then switch ON after sometime. It also eliminate the stretch associated with time adjustment whenever the battery is down and replaced or when the watch is switched OFF and then ON. It performed satisfactorily and as a result, the system can be adapted and integrated to the new technology of modern watch as it can be adopted by the user to locate his/her position at any point in time.

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Astronomical Tent Observatories in the Late Eighteenth Century

de Grijs,

Jacob

2023

Springer Biographies

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The Rise and Decline of England's Watchmaking Industry, 1550–1930

Cited by 3 publications

References 0 publications

Sydney's Scientific Beginnings: William Dawes' Observatories in Context

Sydney's Scientific Beginnings: William Dawes' Observatories in Context

Development of a Compact and Accurate Auto-Update Digital Clock with Real-Time Location Display using Organic Light Emitting Diode and Crystal Oscillator

Astronomical Tent Observatories in the Late Eighteenth Century

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