The Society as a whole knows little of the deaf, or the so-called deaf and dumb. They do not form a large part of the population, and many people seldom come in contact with them. Their affliction to a great extent removes them from the usual avenues of intercourse with men and debars them from many of the social activities of life, all tending to make the deaf more or less a class apart in the community. A considerable part of this deafness is preventable under enlightened action. Medical science is principally in control of the situation, but there is also much that can be done in general measures for the protection of the health. In attacking the problem, the most immediate practical program lies in the arrest of those diseases, especially infantile and infectious diseases, that cause deafness.