Sundial

An adjustable sundial comprising:

• (a) a first semi-circular member, a straight cord means subtended between the ends of the first semi-circular member, date calibrations inscribed on the concave surface of the first member extending approximately plus or minus 23.5.degree. about the midpoint of the first semi-circular member, and having spacing corresponding to the sun's declination;
• (b) a second semi-circular member of substantially the same size as the first member, the midpoint of the second member being secured to the midpoint of the first member and at a right angle with respect thereto, a second straight cord means subtended between the ends of the second member and crossing said first cord means at a right angle with respect thereto;
• (c) a circular segment slip ring member having the same radius and curvature as the second member reciprocally disposed on the concave surface of said second member, a plurality of equally spaced time calibrations ranging from morning to evening on the concave surface of said slip ring, the 12 o'clock indicia being located near the midpoint thereof;
• and
• (d) sun declination adjusting means carried by the sundial and cooperating with the slip ring member for correcting the time according to the sun's declination.