An introduction to bird watching that includes advice on building bird feeders and houses, putting out food and bird baths, and identifying some common birds.
Describes the life cycle of the knobbed whelk, identifies different types of shells and their usefulness to man, and gives suggestions for building a shell collection.
The author describes the construction of his own pond and discusses photosynthesis as the basis of the food cycle involving various forms of aquatic vegetation, insects, amphibians, and higher forms of life.
Explains some basic principles of light--how it travels, how it is reflected, how shadows are made, and how light rays are bent. Includes simple experiments.
