Timeline Story of Clock and Calendar

Why did we start measuring time? Why do we have seven days in a week? Who invented the spring powered watch? How do we measure time with millionth of a second accuracy?

Timeline Story of Clock and Calendar gives you the answers to these and many other questions by taking you through the milestones of technological development from the sundial era to the present atomic clock era.

Written in a non-technical language, this comprehensive technology history of time measurement systems and instruments is an easily accessible book for readers of all levels. The author explains the systems of ancient calendars and the historical developments that brought us to the present day Gregorian calendar. Also covered in this book is the technological advancement from sundial to atomic clocks through the way of mechanical and electrical clocks. In addition, topics such as the concept of time and the determination of time zones are also explained in the Timeline Story of Clock and Calendar.

With many photos to explain clearly the topics discussed in each section, and a detailed glossary and index, this book is a must have for home libraries and public libraries alike.