American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 250
ide of the line described by the telescope ofthe instrument. Thus if Z is the zenith, Pthe pole, and the circle is theorbit of the star, a linedrawn from Z to W, passingthrough the pole, will be thetrue meridian. If, however,the instrument has a west-ing, say of as much as MW, the line of… … amount of westing errors ; and by the diagramit is seen how the true line may be obtained,for the time taken to complete the whole revo-lution is exactly twenty-four hours, and there-fore the passage from C to D will be exactlytwelve hours. The small diameter of the orbit, and thebrightness of the…
Clocks and watches
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