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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.