American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 97
he west side, it is west. Erect Declining Dials.—As we have beforementioned, those upright dial planes, whichdecline from the north or south points to-ward the east or the west, are called decliningdials, and the first thing to be ascertained before attempting their construction, is theamount of… … the perpendicular, C 12, for the 12 oclockhour line, and from the line of chords take60°, and with one foot of the compass in C,draw the semicircle ADB; take the com-plement of the lat. (36° 35) from the line ofchords, and set it from D to E, and draw EF parallel to A B ; this done, take in…
Clocks and watches
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