Library / Engineering & Technology / The slide rule / Braille
The slide rule ⠃⠗⠋ braille edition
Grade 1 — uncontracted, letter-for-letter. Translated on this server by our own braille engine (BRF — Braille Ready Format, Library of Congress fdd000551). View Grade 2 instead.
Download .brf — Grade 2 Download .brf — Grade 1 Plain-text reader .txt
311,539 braille cells · 319 embossed pages at 40×25 · 9,216 unrepresentable characters omitted
⠊⠎⠀⠞⠓⠑⠗⠑⠋⠕⠗⠑⠀⠙⠊⠧⠊⠙⠑⠙⠀⠊⠝⠞⠕⠀⠼⠑⠚⠀⠏⠁⠗⠞⠎⠲⠀ ⠠⠋⠕⠗⠀⠞⠓⠑⠀⠀⠗⠑⠍⠁⠊⠝⠙⠑⠗⠀⠕⠋⠀⠞⠓⠑⠀⠎⠉⠁⠇⠑⠀⠑⠁⠉⠓⠀⠕⠋ ⠀⠞⠓⠑⠀⠼⠁⠚⠀⠎⠥⠃⠙⠊⠧⠊⠎⠊⠕⠝⠎⠀⠕⠋⠀⠑⠁⠉⠓⠀⠍⠁⠊⠝⠀⠎⠏⠁⠉⠑ ⠀⠊⠎⠀⠀⠙⠊⠧⠊⠙⠑⠙⠀⠊⠝⠞⠕⠀⠞⠺⠕⠀⠏⠁⠗⠞⠎⠀⠕⠝⠇⠽⠆⠀⠎⠕⠀ ⠞⠓⠁⠞⠀⠋⠗⠕⠍⠀⠞⠓⠑⠀⠍⠁⠊⠝⠀⠙⠊⠧⠊⠎⠊⠕⠝⠀⠼⠙⠀⠞⠕⠀⠞⠓⠑⠀ ⠑⠝⠙⠀⠀⠕⠋⠀⠞⠓⠑⠀⠎⠉⠁⠇⠑⠀⠞⠓⠑⠀⠏⠗⠊⠍⠁⠗⠽⠀⠎⠏⠁⠉⠑⠎⠀⠁⠗⠑ ⠀⠙⠊⠧⠊⠙⠑⠙⠀⠊⠝⠞⠕⠀⠼⠃⠚⠀⠏⠁⠗⠞⠎⠀⠕⠝⠇⠽⠲⠀⠀⠀⠀⠠⠊⠝⠀⠞⠓⠑ ⠀⠥⠏⠏⠑⠗⠀⠎⠉⠁⠇⠑⠎⠀⠠⠁⠀⠕⠗⠀⠠⠃⠂⠀⠊⠞⠀⠺⠊⠇⠇⠀⠃⠑⠀⠋⠕⠥⠝⠙ ⠀⠞⠓⠁⠞⠤⠤⠁⠎⠀⠞⠓⠑⠀⠎⠏⠁⠉⠑⠀⠼⠁⠤⠃⠀⠊⠎⠀⠕⠋⠀⠀⠕⠝⠇⠽⠀ ⠓⠁⠇⠋⠀⠞⠓⠑⠀⠇⠑⠝⠛⠞⠓⠀⠕⠋⠀⠞⠓⠑⠀⠉⠕⠗⠗⠑⠎⠏⠕⠝⠙⠊⠝⠛⠀ ⠎⠏⠁⠉⠑⠀⠕⠝⠀⠠⠉⠀⠕⠗⠀⠠⠙⠤⠤⠞⠓⠑⠀⠼⠁⠚⠀⠀⠎⠥⠃⠙⠊⠧⠊⠎⠊⠕⠝⠎ ⠀⠕⠋⠀⠞⠓⠊⠎⠀⠊⠝⠞⠑⠗⠧⠁⠇⠀⠁⠗⠑⠀⠙⠊⠧⠊⠙⠑⠙⠀⠊⠝⠞⠕⠀⠋⠊⠧⠑⠀ ⠏⠁⠗⠞⠎⠀⠕⠝⠇⠽⠲⠀⠀⠠⠎⠊⠍⠊⠇⠁⠗⠇⠽⠀⠑⠁⠉⠓⠀⠕⠋⠀⠞⠓⠑⠀⠼⠁⠚⠀ ⠎⠥⠃⠙⠊⠧⠊⠎⠊⠕⠝⠎⠀⠕⠋⠀⠞⠓⠑⠀⠊⠝⠞⠑⠗⠧⠁⠇⠎⠀⠼⠃⠤⠉⠂⠀ ⠼⠉⠤⠙⠂⠀⠁⠝⠙⠀⠼⠙⠤⠑⠀⠀⠁⠗⠑⠀⠋⠥⠗⠞⠓⠑⠗⠀⠙⠊⠧⠊⠙⠑⠙⠀⠊⠝⠞⠕ ⠀⠞⠺⠕⠀⠏⠁⠗⠞⠎⠀⠕⠝⠇⠽⠂⠀⠺⠓⠊⠇⠑⠀⠋⠕⠗⠀⠞⠓⠑⠀⠗⠑⠍⠁⠊⠝⠙⠑⠗ ⠀⠕⠋⠀⠞⠓⠑⠀⠀⠎⠉⠁⠇⠑⠀⠕⠝⠇⠽⠀⠞⠓⠑⠀⠼⠁⠚⠀⠎⠥⠃⠙⠊⠧⠊⠎⠊⠕⠝⠎ ⠀⠁⠗⠑⠀⠏⠕⠎⠎⠊⠃⠇⠑⠂⠀⠕⠺⠊⠝⠛⠀⠞⠕⠀⠞⠓⠑⠀⠗⠁⠏⠊⠙⠇⠽⠀⠀ ⠙⠊⠍⠊⠝⠊⠎⠓⠊⠝⠛⠀⠇⠑⠝⠛⠞⠓⠎⠀⠕⠋⠀⠞⠓⠑⠀⠏⠗⠊⠍⠁⠗⠽⠀ ⠎⠏⠁⠉⠊⠝⠛⠎⠲⠀⠀⠀⠀⠠⠞⠓⠑⠀⠧⠁⠇⠥⠑⠎⠀⠁⠉⠞⠥⠁⠇⠇⠽⠀⠛⠊⠧⠑⠝⠀ ⠕⠝⠀⠞⠓⠑⠀⠗⠥⠇⠑⠀⠗⠥⠝⠀⠋⠗⠕⠍⠀⠼⠁⠀⠞⠕⠀⠼⠁⠚⠀⠕⠝⠀⠞⠓⠑⠀ ⠇⠕⠺⠑⠗⠀⠀⠎⠉⠁⠇⠑⠎⠀⠁⠝⠙⠀⠋⠗⠕⠍⠀⠼⠁⠀⠞⠕⠀⠼⠁⠚⠚⠀⠕⠝⠀⠞⠓⠑ ⠀⠥⠏⠏⠑⠗⠀⠎⠉⠁⠇⠑⠎⠂⠀⠁⠝⠙⠂⠀⠁⠎⠀⠑⠭⠏⠇⠁⠊⠝⠑⠙⠀⠕⠝⠀⠏⠁⠛⠑ ⠀⠀⠼⠊⠂⠀⠁⠇⠇⠀⠋⠁⠉⠞⠕⠗⠎⠀⠁⠗⠑⠀⠃⠗⠕⠥⠛⠓⠞⠀⠺⠊⠞⠓⠊⠝⠀ ⠞⠓⠑⠎⠑⠀⠗⠁⠝⠛⠑⠎⠀⠕⠋⠀⠧⠁⠇⠥⠑⠎⠀⠃⠽⠀⠍⠥⠇⠞⠊⠏⠇⠽⠊⠝⠛⠀⠀
These are the same pages the .brf download embosses — form-feed breaks and all. BRF opens in braille software (Duxbury, BrailleBlaster), on embossers, and on refreshable displays.