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Popular scientific lectures ⠃⠗⠋ 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

672,558 braille cells · 715 embossed pages at 40×25 · 1,972 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.