Recounts the history of the development and proliferation of sundials, and reviews basic concepts of cosmology necessary for their design. Describes different types of devices, including rare and complex dials, lists popular sundial mottoes, and provides instructions for building a sundial. Includes b&w photos. This Dover edition is an unabridged republication of a work published by University of Toronto Press, 1970, originally published in French in 1965. Annotation c. by Book News, Inc., Portland, Or.