Eugenics also will be looked to for help, and it may in time bring to light much that is now hidden from our ken. As yet our knowledge of the causes of deafness from birth is very imperfect. A small part may be ascribed to consanguineous marriages, and a larger part to the marriages of those whose families are affected with deafness, these perhaps not being wholly distinct, and together comprising a little over half of congenital deafness. Marriages of relatives, even though not of frequent occurrence so far as deafness is affected, have a relation to it which is not to be ignored. Intermarriages of the deaf themselves are not found for the most part to result in deaf offspring; while the likelihood of such is not always greater when both parents are deaf than when one is deaf and the other hearing. The one distinct fact of which we seem altogether certain in this matter is that when there is in the parent congenital deafness, or especially when there are deaf relatives concerned, the chances are vastly increased of deaf offspring. These are the danger signals, and not to be passed without heed. As to that form of deafness occurring when consanguinity and antecedent deafness are not involved, we are in greater ignorance. For most of it, however, we may believe that there is inherited some strain or influence predisposing to deafness; and that in the discovery and application of eugenic principles a greater or less portion will be eliminated. Though, so far as is discernible from the immediate prospect, we cannot look to an early disappearance of deafness from the race, there are indications at present that deafness is tending to become less. The probabilities are that the future will be able to report advance, and so far as the ultimate results are concerned, we have no reason to be other than hopeful. In respect to what has been accomplished for the deaf since America has become concerned in them, we have a record that may well be a distinct cause of pride. The work for the deaf in America is hardly a hundred years old. Yet in that time there has transpired what, without violence being done to language, can be called a revolution. A century ago the deaf were practically outside the pale of human thought and activities. They were in a measure believed to be without reason, and were little less than outcasts in society. To-day they have become active components of the state, possessed of education, on a level with their fellow-men nearly everywhere in the scale of human employment, capable of all the responsibilities of life, and standing in the full stature of citizenship.