Instruction of the Deaf and Dumb : or a Theoretical and Practical View of the Means by Which They Are Taught to Speak and Understand a Language : Containing Hints for the Correction of Impediments in Speech Together With a Vocabulary

Instruction of the Deaf and Dumb : or a Theoretical and Practical View of the Means by Which They Are Taught to Speak and Understand a Language : Containing Hints for the Correction of Impediments in Speech Together With a Vocabulary