One of the wonders of modern science is this story of the development of new plant species and improvement in the best of the old, by the skillful processes of plant breeding. Notable also has been the improvement in American horses, cattle, swine and poultry, developed by the same scientific principles. Projected efficiency, or breeding power to beget valuable progeny, is the central idea. Simple selection is the method. Out of a large number of animals the phenomenal individual is selected for his notable capacity for reproducing in his offspring his own desirable characteristics. Thus the best blood is multiplied and the less desirable is discarded. Sometimes by close inbreeding the eugenic process has been hastened. In this way scientific stock raisers have been able practically to make to order animals with any desired quality. For instance, the great demand for bacon in England has been met by a masterly bit of agricultural statesmanship, for which Mr. John Dryden, chief of the Canadian Agricultural Department, is responsible. After careful study and experiment, the Yorkshire and Tamworth breeds of hogs were crossed and a special breed developed especially valuable for bacon with exceptionally long sides of uniform thickness and with alternating layers of fat and lean. Selected bacon made to order! New breeds of sheep have been developed which have combined phenomenal wool-producing power with superior meat production; similarly short-horn cattle with great milk-giving capacity and beef production; and more remarkable still have been the results in horse breeding. In spite of all the motor-cycles and automobiles, the horse is becoming more and more useful, because more highly civilized and specialized. The breeders know how to build up horse-flesh to suit your special needs for draft horse, family horse, trotter or pacer, with any desired form, proportions or talent, almost as accurately as a druggist compounds prescriptions! The wonderful possibilities involved challenge our imagination. Among the results of this stock-raising strategy we ought to expect not only happier and richer farmers, but better and cheaper food and clothing for all classes of people. The very fact that the business is now on a scientific basis has appealed to students and is attracting men of large abilities who see the opportunity to better rapidly, year by year, the live-stock quality of the whole country. _Marvels in Plant Production_