Klein, Aaron E

Discusses the development of microscopes and telescopes, how they work, and how to select and use them.

Offers profiles of the financiers, engineers, and designers responsible for the completion of the first railroad systems in the U.S. and Canada, and describes the challenges railroad workers faced crossing the continent.

Traces the development of railroads in the United States and Canada, offers profiles of influential railroad men, and shows a variety of antique and modern locomotives.

Explores the world of the parasite discussing the different types of organisms, their life cycles, and other information.