Arnold, John, c1736 - 1799 (watch and chronometer maker)
Found in 5 Collections and/or Records:
The observations begin with a note on setting up his instruments on shore. Included are daily astronomical observations, observations for determining the variation of the magnetic needle, and observations of the rate of Clocks B and C, and of Watch No. 1.
Daily log entries resume on 17 April when the ship left Cape Town, bound for England. These are preceded by a note dated 15 April on Watch No. 1 which was found to be too slow for meantime. Bayly includes sightings of seals and bottlenose dolphins, along with notes of the ship’s estimated speed. His observations include measurements of the distance of the moon from Spica Virginis and from Pollux.
Bayly begins his observations with a note on setting up his instruments on shore, in which he records the loss or theft of some of his equipment. His observations include comparisons of Watch No. 1 with the astronomical clock at the Cape of Good Hope; meridian zenith distances of the sun and stars; observations on the dipping needle; observations on the tides; distances of the sun, moon and stars; and azimuths taken with a compass of constructed by Dr Knight.
- Subject: Cape Town X