The Literary and Scientific Class Book: Embracing the Leading Facts and Principles of Science. Illustrated by Engravings, with Many Difficult Words Explained at the Heads of the Lessons, and Questions Annexed for Examination; Designed as Exercises for the Reading and Study of the Higher Classes in Common Schools. Selected from the Rev. John Platts' Literary and Scientific Class Book, and from Verious Other Sources, and Adapted to the Wants and Condition of Youth in the United States