American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 100
equal parts, and through thosedivisions draw the meridians or hour circles,all meeting at the poles. At 23° 29 from thepoles draw the polar circles ; and the samedistance north and south of the equinoctialdraw the tropics Capricorn and Cancer, andfrom 53 to V5 draw the ecliptic; on which you can,… … The hours must be numbered in the equi-noctial, placing 12 in the east and west pointsof the horizon, and 6 in the meridian; be-cause one-half the globe is illuminated, andthe edge of illumination shows the hour intwo opposite places. On it, if you choose,can be drawn the outline of the…
Clocks and watches
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