num_pages: 32
description: People used sundials and calendars to keep track of time long before the invention of stylish wristwatches and radio alarm clocks. This book provides kids with an in-depth look at the development of both ancient and modern-day timepieces.
language: English
title: The History of the Clock
titlecomplete: The History of the Clock (The Timeline Library, Our Changing World)
publisher: Childs World Inc