"Presents information on simple machines with a focus on wheels and axles. Explains what wheels and axles are, how wheels and axles work, and includes examples of past and present uses. Intended for t
While Alexander Graham Bell won the race to patent the telephone, he was only one among many inventors who explored instant voice communication. This fascinating book describes the evolution of the te
Text and photographs portray Puerto Rico's geography and climate, city and rural life, industry, and transportation, focusing especially on the island's status as a Commonwealth.
This revised edition of England the People features the ways of life in early England from early Roman settlements to Viking invasions, and the legacies of the Angles, Saxons, Celts, and Normans, Engl
Updated statistics and new photographs are featured in this revised edition of England the Land. Englands landscape is rich in beauty and dotted with history. From the breathtaking Lake District to th
