James Gall's triangular tactile alphabet and numerals for the blind.

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James Gall's triangular tactile alphabet and numerals for the blind. From Cyclopaedia of Useful Arts and Manufactures by Charles Tomlinson.

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Size: 5921px × 3205px
Photo credit: © Classic Image / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 19th, alphabet, blind, capital, case, century, character, characters, embossed, gall, illustration, invention, james, letter, letters, nineteenth, number, numbers, numeral, numerals, roman, system, tactile, touch, triangular, writing