Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 291
lock keeping siderealtime ; and regulated from this is the standard solar timeclock, giving the time by which all our clocks andwatches are governed. In practice at Greenwich thesolar clock is regulated as follows : in the computingroom are two chronometers, c and h, Fig. 129, the one, c,regulated… … CHAP. XVII.] THE TRANSIT CLOCK AND CHRONOGRAPH. 269 the Nautical Almanac list, the difference between theobserved time of transit and the right ascension of thestar being the error required. The proper differencebetween the two clocks is then calculated and the errorallowed for, which shows whether…
Astronomy · Telescopes
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