In preparing the new edition of his _Text-Book of Mineralogy_[16] first published in 1877, Prof. _E. S. Dana_ has found it necessary to rewrite the whole as well as to add much new matter and many new illustrations. The work being designed chiefly for use in class or private instruction, the choice of topics discussed, the order and fullness of treatment, and the method of presentation have been determined by that object. The different types of crystal forms are described under the thirty-two groups now accepted, classed according to their symmetry. In the chapters on physical and chemical mineralogy, the plan of the former edition is retained of presenting somewhat fully the elementary principles of the science on which the mineral characters depend, and the author has tried to give the student the means of becoming practically familiar with the modern means of investigation. Especial attention is given to the optical qualities of crystals as revealed by the microscope; and frequent references are introduced to important papers on the different subjects discussed. The descriptive part of the volume is essentially an abridgment of the sixth edition of Dana's System of Mineralogy, published in 1892, to which the student is referred for fuller and supplementary information. A full topical index is furnished in addition to the usual index of species. The title, _The Story of the Railroad_,[17] carries with it the suggestion of an eventful history. The West, in the author's view, begins with the Missouri River. The story of its railroad is the story of the line, now very multiple, that leads to the Pacific Ocean. The beginning of white men's travels in these routes is traced by the editor to the Spanish adventurers of the sixteenth century, who made miserable journeys in search of gold or visionary objects, through regions now traversed by some of the more southern lines. Then came trappers; next costly and painfully undertaken Government expeditions into the then regions of the unknown, the stories of which were the boyhood delight of men now living. The period of practical traversing of the continent began with the raging of the California gold fever, when the journey of many weeks was tiresomely made with ox teams, in the face of actual perils of the desert, starvation, thirst, and the Indians. After California became important, stage and express lines were put on; but still, at the time Mr. Warman takes up the story, less than sixty years ago, the idea of building a railroad to the Pacific was regarded as too visionary to be entertained, and Asa Whitney sacrificed a fortune trying to induce somebody to take it up. The first dreams were for a short route to the Orient. Eventually the idea was developed that the American West might be worth going after, and then the idea of a railroad to it began to assume practical form. Young Engineer Dodge, afterward Major General, began surveys before