Sundials.

By: Roy K. Marshall

The story of sundials, their underlying principles, and the practical problems of their construction are presented in this introductory book. To acquaint the reader with the principles behind this instrument, the author explains the natural phenomena upon which it is based - the sun's apparant daily motion and the movement of shadows - and the use of angular measurment to measure time. Since every sundial must be corrected for the location in which...

• Format: Hardcover
• Language: English
• ISBN: B000BWP372
• Release Date: January 1963
• Publisher: Macmillan Company
• Length: 126 Pages