problems that has to be solved, and it will be more difficult of solution than the race problem in the United States, where the races are becoming more widely separated every year and where it is very infrequent to find persons of the two races in the same family. In Porto Rico the problem will be intensified because it is not merely a problem between races, but a race problem which involves the family organization in many cases. The government of Brazil has predicted that in a hundred years there will be no black inhabitants in the Brazilian republic, that they will be entirely assimilated by the white race or carried off by disease. The census report for Porto Rico shows a falling off in the black race of about 9,000 in the last ten years, and an increase of about 30,000 in the mixed or mulatto population. Thus the assimilation of the black population is gradually taking place, and whether this will in time lead to a complete assimilation, or whether the mixed race will become weakened through this racial intermarriage to such an extent that it will eventually refuse to propagate, is a question which only time can answer. There is no doubt, however, that this is one of the problems that must be confronted in Porto Rico.