Zim, Herbert Spencer

Covers some famous diamonds, diamond fields, the hardness of the stones, refraction, cutting a gem, industrial diamonds, and synthetic diamonds.

Explains aspects of thunderstorms: rising, heated air; electrical charges in the air; lightning and its power, types and effects; and thunder.

Explains the known facts about comets: composition, weight, size, and orbits. Discusses the famous comets of the past and the many facts still not understood by scientists.

A guide to 458 species of animals and plants found along the seashore includes algae, flowering plants, worms,sponges, starfish, anthropods, shellfish, and birds.

Includes information on collecting and identifying minerals, and sections on metallic, nonmetallic, gem and rock-forming minerals, and on igneous, sedimentary and metamorphic rocks.

Sections on turtles, lizards, snakes, alligators and crocodiles, frogs and toads, and salamanders give information on description, habits and range for each species common in the United States.

A guide to North American insects which gives popular name, describes life and reproduction cycles and feeding habits, and includes a range guide.

A guide to mammals of North America that includes a description of each species, a detailed drawing of the animal, and a map locating his common range.

A guide to North American insects which gives popular name, describes life and reproduction cycles and feeding habits, and includes a range guide.

Includes information on collecting and identifying minerals, and sections on metallic, nonmetallic, gem and rock-forming minerals, and on igneous, sedimentary and metamorphic rocks.