d without materially af- computed or spaced in by eye. Lines joining each of manner other hour or half-hour points may be located fecting the results. the hour or minute marks with the center a or a' will on the semi-circles having a and a' as centers. The V For a horizontal sun dial the angle at… … o'clock or XI, 30 deg. for II or X, etc. For a vertical Detail: Gnomon of Fig. 1. a and e. The angle dae — 38 deg. 54 min., and is the dial: The angle at the correct angle for a stile foot of the stile = 90 at the given latitude. deg. — lat. of the place The sides ad and ae = co lat. may then be…
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