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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.