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First notions of logic (preparatory to the study of geometry) ⠃⠗⠋ 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.

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67,011 braille cells · 68 embossed pages at 40×25 · 366 unrepresentable characters omitted

⠠⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⠁⠇⠇⠀⠞⠓⠑⠀⠀⠊⠎⠀⠊⠝⠀⠞⠓⠑⠀⠀⠀⠀⠀⠀⠀⠀⠀
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⠠⠁⠇⠇⠀⠞⠓⠑⠀⠀⠊⠎⠀⠊⠝⠀⠞⠓⠑⠀⠀⠀⠀⠀⠠⠊⠝⠀⠕⠗⠙⠑⠗⠀⠞⠕⠀
⠋⠊⠝⠙⠀⠁⠇⠇⠀⠞⠓⠑⠀⠏⠕⠎⠎⠊⠃⠇⠑⠀⠋⠕⠗⠍⠎⠀⠕⠋⠀
⠎⠽⠇⠇⠕⠛⠊⠎⠍⠂⠀⠺⠑⠀⠍⠥⠎⠞⠀⠍⠁⠅⠑⠀⠁⠀⠀⠞⠁⠃⠇⠑⠀⠕⠋⠀⠁⠇⠇⠀
⠞⠓⠑⠀⠑⠇⠑⠍⠑⠝⠞⠎⠀⠕⠋⠀⠺⠓⠊⠉⠓⠀⠞⠓⠑⠽⠀⠉⠁⠝⠀⠉⠕⠝⠎⠊⠎⠞⠆⠀
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⠁⠝⠙⠀⠠⠭⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⠃⠀⠁⠝⠙⠀⠠⠭⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
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⠠⠝⠕⠀⠠⠁⠀⠊⠎⠀⠠⠭⠀⠀⠀⠀⠀⠀⠀⠠⠑⠀⠠⠝⠕⠀⠠⠃⠀⠊⠎⠀⠠⠭⠀⠀⠀⠀⠀⠀
⠠⠎⠕⠍⠑⠀⠠⠁⠀⠊⠎⠀⠠⠭⠀⠀⠀⠀⠀⠠⠊⠀⠠⠎⠕⠍⠑⠀⠠⠃⠀⠊⠎⠀⠠⠭⠀⠀⠀⠀
⠠⠎⠕⠍⠑⠀⠠⠁⠀⠊⠎⠀⠝⠕⠞⠀⠠⠭⠀⠠⠕⠀⠠⠎⠕⠍⠑⠀⠠⠃⠀⠊⠎⠀⠝⠕⠞⠀⠠⠭
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⠑⠧⠑⠗⠽⠀⠠⠭⠀⠊⠎⠀⠠⠁⠀⠀⠀⠀
⠠⠥⠀⠠⠑⠧⠑⠗⠽⠀⠠⠭⠀⠊⠎⠀⠠⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠠⠎⠕⠍⠑⠀⠠⠭⠀⠊⠎⠀⠝⠕⠞⠀⠠⠁⠀⠠⠽⠀⠠⠎⠕⠍⠑⠀⠠⠭⠀⠊⠎⠀⠝⠕⠞⠀⠠⠃
⠀⠀⠀⠀⠠⠕⠗⠀⠞⠓⠑⠊⠗⠀⠎⠽⠝⠕⠝⠽⠍⠑⠎⠂⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠁⠝⠙⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠁⠝⠙⠀⠀⠀⠀⠀⠀⠀
⠠⠁⠇⠇⠀⠞⠓⠑⠀⠀⠊⠎⠀⠊⠝⠀⠞⠓⠑⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠠⠁⠀⠠⠁⠇⠇⠀⠞⠓⠑
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⠠⠎⠕⠍⠑⠀⠕⠋⠀⠞⠓⠑⠀⠀⠊⠎⠀⠊⠝⠀⠞⠓⠑⠀⠀⠀⠀⠀⠀⠠⠊⠀⠠⠎⠕⠍⠑⠀⠕⠋
⠀⠞⠓⠑⠀⠀⠊⠎⠀⠊⠝⠀⠞⠓⠑⠀⠀⠀⠀⠀⠀⠀⠀⠠⠎⠕⠍⠑⠀⠕⠋⠀⠞⠓⠑⠀⠀⠊⠎⠀
⠝⠕⠞⠀⠊⠝⠀⠞⠓⠑⠀⠀⠠⠕⠀⠠⠎⠕⠍⠑⠀⠕⠋⠀⠞⠓⠑⠀⠀⠊⠎⠀⠝⠕⠞⠀⠊⠝⠀
⠞⠓⠑⠀⠀⠀⠀⠀⠀⠀⠀⠠⠁⠇⠇⠀⠞⠓⠑⠀⠀⠊⠎⠀⠊⠝⠀⠞⠓⠑⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
⠠⠥⠀⠠⠁⠇⠇⠀⠞⠓⠑⠀⠀⠊⠎⠀⠊⠝⠀⠞⠓⠑⠀⠀⠀⠀⠀⠀⠀⠀⠠⠎⠕⠍⠑⠀⠕⠋⠀

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.