John F Prevost

Describes the physical characteristics and habits of the species of dolphin known as common, saddleback, or Pacific.

Learn how to identify this type of dolphin.

Describes the structure of and growing conditions for violets, with information about the various species and the pests and diseases that may affect them.

Describes the tulip flower, the colors and varieties of tulips, the bulbs and seeds, and the various insect pests and diseases that may attack these popular spring flowering bulbs.

Presents brief information about the roots, trunk, leaves, fruits, and varieties of apple trees, pests that affect them, their economic uses, and more.