DR. SINGER here gives a succinct account of the general evolution of Greek biological and medical knowledge. The biological portion of the book is arranged in three sections, “Before Aristotle” (18 pp.), “Aristotle”(36 pp.), and “After Aristotle” (24 pp.); the remaining 50 pp. being allotted to Greek medicine. The section on Aristotle appears here for the first time; the others are reprinted, with slight amendments, from “The Legacy of Greece.” All who are interested in the biological sciences will be glad to have in this cheap and convenient little volume an authoritative account of the works of Aristotle, Galen, Hippocrates, and others who laid the foundations of the science of life; andthe majority of readers will be amazed at the extent of our indebtedness to Greece.