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How to Use the Popular Science Library; History of Science; General Index ⠃⠗⠋ 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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1,228,378 braille cells · 1,293 embossed pages at 40×25 · 3,762 unrepresentable characters omitted

⠁⠝⠉⠑⠎⠞⠕⠗⠎⠀⠀⠊⠎⠀⠉⠁⠏⠁⠃⠇⠑⠀⠕⠋⠀⠃⠑⠊⠝⠛⠀
⠝⠥⠍⠑⠗⠊⠉⠁⠇⠇⠽⠀⠑⠭⠏⠗⠑⠎⠎⠑⠙⠲⠀⠀⠀⠀⠠⠞⠓⠑⠀
⠑⠭⠏⠑⠗⠊⠍⠑⠝⠞⠎⠀⠁⠝⠙⠀⠉⠕⠝⠉⠇⠥⠎⠊⠕⠝⠎⠀⠕⠋⠀⠠⠛⠗⠑⠛⠕⠗⠀
⠠⠍⠑⠝⠙⠑⠇⠀⠶⠼⠁⠓⠃⠃⠤⠁⠓⠓⠃⠶⠀⠞⠑⠝⠙⠀⠀⠞⠕⠀⠕⠏⠏⠕⠎⠑⠀⠞⠓⠑
⠀⠇⠁⠺⠀⠕⠋⠀⠁⠝⠉⠑⠎⠞⠗⠁⠇⠀⠓⠑⠗⠑⠙⠊⠞⠽⠂⠀⠃⠥⠞⠀⠊⠞⠀⠊⠎⠀
⠃⠑⠇⠊⠑⠧⠑⠙⠀⠞⠓⠁⠞⠀⠀⠁⠝⠽⠀⠑⠭⠉⠑⠏⠞⠊⠕⠝⠁⠇⠀⠉⠁⠎⠑⠎⠀⠍⠁⠽
⠀⠃⠑⠀⠑⠭⠏⠇⠁⠊⠝⠑⠙⠀⠃⠽⠀⠞⠓⠑⠀⠕⠏⠑⠗⠁⠞⠊⠕⠝⠀⠕⠋⠀
⠎⠏⠑⠉⠊⠁⠇⠀⠀⠉⠕⠝⠙⠊⠞⠊⠕⠝⠎⠲⠀⠀⠀⠀⠠⠅⠁⠗⠇⠀⠠⠏⠑⠁⠗⠎⠕⠝⠀
⠓⠁⠎⠀⠎⠓⠕⠺⠝⠀⠃⠽⠀⠞⠓⠑⠀⠁⠝⠁⠇⠽⠎⠑⠎⠀⠕⠋⠀⠝⠥⠍⠑⠗⠕⠥⠎⠀
⠎⠞⠁⠞⠊⠎⠞⠊⠉⠁⠇⠀⠗⠑⠉⠕⠗⠙⠎⠀⠀⠕⠋⠀⠠⠑⠝⠛⠇⠊⠎⠓⠍⠑⠝⠀⠞⠓⠁⠞
⠀⠃⠽⠀⠁⠗⠞⠊⠋⠊⠉⠊⠁⠇⠀⠎⠑⠇⠑⠉⠞⠊⠕⠝⠀⠁⠝⠽⠀⠎⠑⠇⠑⠉⠞⠑⠙⠀
⠉⠓⠁⠗⠁⠉⠞⠑⠗⠊⠎⠞⠊⠉⠂⠀⠀⠎⠥⠉⠓⠀⠁⠎⠀⠋⠁⠉⠊⠁⠇⠀⠉⠕⠝⠞⠕⠥⠗⠀
⠕⠗⠀⠎⠞⠁⠞⠥⠗⠑⠂⠀⠉⠁⠝⠀⠃⠑⠀⠉⠓⠁⠝⠛⠑⠙⠀⠺⠊⠞⠓⠊⠝⠀⠁⠀⠋⠑⠺⠀
⠛⠑⠝⠑⠗⠁⠞⠊⠕⠝⠎⠲⠀⠠⠃⠥⠞⠀⠺⠓⠑⠝⠀⠞⠓⠑⠀⠉⠓⠁⠗⠁⠉⠞⠑⠗⠀⠓⠁⠎
⠀⠃⠑⠑⠝⠀⠉⠓⠁⠝⠛⠑⠙⠀⠁⠃⠕⠥⠞⠀⠼⠊⠚⠀⠏⠑⠗⠀⠀⠉⠑⠝⠞⠀⠺⠊⠞⠓⠊⠝
⠀⠁⠀⠎⠓⠕⠗⠞⠀⠞⠊⠍⠑⠀⠁⠝⠕⠞⠓⠑⠗⠀⠍⠑⠞⠓⠕⠙⠀⠍⠥⠎⠞⠀⠃⠑⠀
⠑⠍⠏⠇⠕⠽⠑⠙⠂⠀⠃⠑⠉⠁⠥⠎⠑⠀⠞⠓⠑⠀⠀⠕⠗⠊⠛⠊⠝⠁⠇⠀⠕⠝⠑⠀⠞⠓⠑⠝
⠀⠃⠑⠉⠕⠍⠑⠎⠀⠇⠑⠎⠎⠀⠑⠋⠋⠊⠉⠊⠑⠝⠞⠲⠀⠀⠀⠀⠠⠊⠝⠙⠊⠧⠊⠙⠥⠁⠇⠎
⠀⠊⠝⠀⠁⠝⠽⠀⠛⠊⠧⠑⠝⠀⠏⠕⠏⠥⠇⠁⠞⠊⠕⠝⠀⠺⠓⠕⠀⠙⠊⠋⠋⠑⠗⠀⠊⠝⠀
⠎⠊⠵⠑⠀⠋⠗⠕⠍⠀⠞⠓⠑⠀⠍⠑⠁⠝⠀⠀⠕⠋⠀⠞⠓⠑⠀⠏⠕⠏⠥⠇⠁⠞⠊⠕⠝⠀
⠛⠊⠧⠑⠀⠗⠊⠎⠑⠀⠞⠕⠀⠕⠋⠋⠎⠏⠗⠊⠝⠛⠀⠺⠓⠊⠉⠓⠀⠙⠊⠋⠋⠑⠗⠎⠀
⠋⠗⠕⠍⠀⠞⠓⠁⠞⠀⠍⠑⠁⠝⠀⠀⠧⠁⠇⠥⠑⠀⠊⠝⠀⠞⠓⠑⠀⠎⠁⠍⠑⠀
⠙⠊⠗⠑⠉⠞⠊⠕⠝⠀⠃⠥⠞⠀⠞⠕⠀⠁⠀⠎⠍⠁⠇⠇⠑⠗⠀⠑⠭⠞⠑⠝⠞⠲⠀⠠⠞⠓⠑⠀
⠎⠁⠍⠑⠀⠇⠁⠺⠀⠀⠁⠏⠏⠇⠊⠑⠎⠀⠞⠕⠀⠞⠓⠑⠀⠉⠕⠇⠕⠗⠀⠕⠋⠀⠞⠓⠑⠀
⠓⠁⠊⠗⠀⠕⠗⠀⠞⠕⠀⠊⠝⠞⠑⠇⠇⠊⠛⠑⠝⠉⠑⠀⠕⠗⠀⠉⠕⠝⠎⠞⠊⠞⠥⠞⠊⠕⠝⠲

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