The Outline of Science was written specifically with the man-on-the-street in mind as the target audience. Covering scientific subjects ranging from astronomy to biology to elementary physics in clear, concise and easily understood prose, this popular science work is largely as relevant today as when first published in 1922.

In this third volume (of four), we learn about psychic science, the characteristics and interrelations of living creatures, as well as Botany, Biology, and Chemistry. Some chapters are devoted to the new applied sciences of electricity, telegraphy, and flying. (Summary adapted from the first and second volume by Availle.)