Course. It aims at giving a popular yet accurate view
of the main
principles of the science with which it deals, and preparing the way for the technical or mathematical study. It is intended, like its prede- cessors, mainly for the use of the senior pupils in schools, but it is also admirably adapted for the wants of people who like to know or have only time to know just as much of a subject as will enable them to understand what they read in the paper, or to join in general conversa- tion.