This acclaimed study of the history of scientific exploration in the Southwest from renowned biologist Dr. Samuel Wood Geiser, first published in its present revised edition in 1948, would be of interest to many types of readers: For those who love stories, of adventure and struggle, it narrates the lives and varying fates of men who lived under strange and difficult conditions, and who met those conditions, some with heroic resolution and resourcefulness, some with fainting and failure, many with a mixture of both. These lives are presented, not in the style of the popular semi-fiction of the day, but with such accuracy as only a thorough study of many sorts of records makes possible; yet, too, with sympathy and insight into human nature throughout. For those interested in, frontier life and frontier stories this book presents an unwonted aspect of that life: the struggle for culture and for science under frontier conditions: a struggle no less heroic than that of the fighting pioneer. Naturalists of the Frontier realistically portrays the hard material conditions of frontier life, yet these are illumined by the ideals of the men who subdued those conditions. The student of the early history of the Southwest, and particularly of Texas, will find here presented unusual and significant aspects of that history. For the historian of science this book pictures the beginnings of science in a new country; it shows what science must be under frontier conditions—an examination of the resources of the region, rather than a study of underlying problems.