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Excerpt from:
Existing State Of The Art Of Instructing The Deaf And Dumb
In the intellectual and moral world, the power of the truly natural language is considerably more limited than we have shown it to be in the material.. . .But the colloquial language of the institutions is not so feeble in its resources. It resorts to metaphor and allegory, and resting partly upon these helps, and partly upon tacit convention, it accumulates a very copious vocabulary. By metaphor, the straight line is put for rectitude: by allegory, the equal scale is put for justice....