Description:viii, 142 pages : 21 x 29 cm;Chronicles the history of sundials, discussing the different varieties, the mathematical formulas required to build one, and the basic principles of cosmography;Originally published: Toronto : University of Toronto Press, 1970;Includes bibliographical references (page 134) and index;History of the sundial -- Some gnomonic cosmography -- Classical sundials -- Inclined dials -- Solar calendars -- Analemmatic dials -- Moon dials -- Elevation dials, azimuth dials, direction dials, and others -- Remarkable dials, past and present -- Inscriptions on sundials