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The slide valve, simply explained ⠃⠗⠋ 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

76,971 braille cells · 81 embossed pages at 40×25 · 272 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.