Discusses the characteristics, habits, and specific features of whales, dolphins, and porpoises.

Discusses lizards and their different survival techniques, such as changing color.

Provides brief sketches of fifty members of the Baseball Hall of Fame, including players, managers, and executives from all eras of the sport. Includes a complete list of members.

An introduction to Sweden which touches briefly on its history, geography, folkways, industry, and contributions to the arts.

A biography of the inventor of the cotton gin, whose application of standardized parts to the production of weapons and other machines was a major influence in the development of industry.

Explores the history of the chemical element nitrogen and explains its chemistry, how it is used in industry, and its importance in our lives.

Discusses the traditional and modern way of life of the Chippewa, examining their culture, religion, and politics.

Describes the history and customs of the Potawatomi people.

Describes the composition, formation, appearance, and uses of certain minerals, including some gemstones.

Describes the geography, plants, animals, history, economy, language, religions, culture, sports, art, and people of the state of Michigan.