Collins, A. Frederick (Archie Frederick), 1869- · New York, London, D. Appleton and company · leaf 64
rip of iron or brass % inch wide, x/16 inchthick and 13 inches long; drill a yi6 inch hole through each nr ur m wtsm k XI man in xi hi he ifflnnrxxtffl Z4r> Fig. 45.—Numbered Strip for Sundial. end and a %-inch hole 4 inches from one end; bend this stripinto an exact semi-circle, as shown in… … Fig. 46.—Tin Ring fo:: Sundial. exactly through the center of the tin ring. Now screw thebrass semi-circle to a baseboard (see Fig. 48), so that theangle made by the wire and the surface of the board will beequal to the latitude of the place where it is to be used; in otherwords, when the board is…
Astronomy · Stars
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
