...I add four sets of meridians (Plate ), by filling in which from thecharts the observer may obtain any number of views of the planet as itappears at different times... 
Richard A. Proctor 「Half-hours with the Telescope」
...One of the first considerations which strikes us in comparing thesemultitudinous publications is the confusion which must arise from theuse of so many meridians...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
...
Colures, the four principal meridians of the celestial spherepassing from the pole, one through each equinox, and one througheach solstice...
Henry Warren 「Recreations in Astronomy」
...' With a littlepractice a few minutes will suffice for sweeping out the equidistantcircular arcs which mark the parallels and ruling in the straightmeridians...
Richard A. Proctor 「Half-hours with the Telescope」
...—The difference between "the times" at anytwo meridians is equal to their difference of longitude, andthe time at the eastern meridian is greater than at thewestern meridian...
George C. Comstock 「A Text-Book of Astronomy」
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