The other estimate of the amount of talent in existence has been made by one of our most eminent American sociologists, the late Lester F. Ward. The elaborate treatment of this matter is found in his "Applied Sociology," and offers an illustration of a most rigorous and thorough application of the scientific method to the subject in question. The essential facts for the study were furnished by Odin in his work on the genesis of the literary men of France, although Candole, Jacoby and others are laid under contribution for data. Maps, tables and diagrams are used whenever they can be made to secure results. Odin's study covered the period of over five hundred years of France and French regions, or from 1300 to 1825. Out of over thirteen thousand literary names he chose some 6,200 as representing men of genius, talent or merit, the former constituting much the smaller and the latter much the larger of the total number. The object of Ward's investigation is to discover the factor or factors in the situation which are responsible for the production of genius. In the course of examination it was seen that certain communities were very much more prolific than others in producing talent. Paris, for instance, produced 123 per 100,000; Geneva, Switzerland, 196; certain chateaux as many as 200, and some communities none at all or very few. After considering the various factors which account for the high rate in certain localities and the low rate or absence of merit in others the conclusion is reached that we should expect the presence of the meritorious class generally in even greater numbers than it has existed in the most fruitful regions of the French people. Mr. Ward's studies have led him to conclude that talent is latent in society, that it exists in greater abundance than we have ever dared to expect, that all classes possess it equally and would manifest it equally if obstacles were removed or opportunities offered for its development. Education is the key to the situation in his estimation. It affords the opportunity which latent talent requires for its promotion, and if this were intelligently applied to all classes and to both sexes alike instead of securing one man of talent for each 4,000 persons as Mr. Galton held, we would be able to mature one for every 500 of our population. This would represent an eight-hundred-per-cent. increase of the talented class, an eight-fold multiplication. It is an estimate of not the number of the talented who are known to be such, but of society's potential or latent talent.[2] [2] Investigations made on school children by the Binet test indicate Ward's estimate is conservative. It has been found that from two to three out of every hundred children are of exceptional ability, thus belonging to the talented, or at least merit class.