The causes and prevention of deafness. Four lectures delivered under the auspices of the National bureau for promoting the general welfare of the deaf
Preface by Leo Bonn.--Author's preface.--Lecture I. The nature and consequences of deafness.--Lecture II. Classification of deafness, and on the prevention of acquired deafness.--Lecture III. Sporadic congenital deafness and deafness from syphilis.--Lecture IV. True hereditary deafness
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