Library / Engineering & Technology / The slide rule / Braille
The slide rule ⠃⠗⠋ braille edition
Grade 2 — contracted English braille (EBAE-compatible subset). Translated on this server by our own braille engine (BRF — Braille Ready Format, Library of Congress fdd000551). View Grade 1 instead.
Download .brf — Grade 2 Download .brf — Grade 1 Plain-text reader .txt
271,406 braille cells · 276 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.