Reduction de las letras y arte para enseñar a [h]ablar los mudos
A 1620 Madrid treatise by Juan Pablo Bonet, written for teaching deaf-mute pupils to speak and read Spanish, and it is the earliest known printed manual of manual finger alphabet. Its engraved plates show hands forming individual letters, drawn with fine parallel hatching, cuffed sleeves and clean, even outlines, with each hand labelled by a capital and a lowercase letter beside it, giving a designer a clear vocabulary of hand gestures and typographic labelling inside a small framed plate.
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