Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 264
. it will be 12h. rightascension, or opposite to the first point of Aries, and so CHAP. XVI.] THE TRANSIT CIRCLE. 241 on up to the twenty-four hours, the clock keeping exacttime with the earth. The transit instrument thus givesus the light ascension of a star, or one co-ordinate : andnow we want… … Fig. 110.—The Mural Circle. The combination of the circle ^Yith the transit, form-ing the transit- or meridian-ciicle, is of comparativelyrecent date, and the earlier method was to use a circle R 242 STARGAZING : PAST AND PRESENT. [book iv. with a telescope attaclied, fixed to a pivot moving…
Astronomy · Telescopes
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