The title page of a book printed in Boston Line Type by Perkins School for the Blind

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“Boston Line Type” or “Boston Line Letter” was a tactile printing system invented by Samuel Gridley Howe. These letterforms contained no capital letters and represented an angular version of Roman letters. This printing system served as a precursor to the now widespread use of Braille lettering, as a way to grant reading abilities to the visually impaired.

Image of a book's title page printed in Boston Line Type
Source: www.perkins.org
Image of a book's title page printed in Boston Line Type