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Popular scientific lectures ⠃⠗⠋ braille edition

Grade 2 — contracted English braille (EBAE-compatible subset). Translated on this server by our own braille engine (BRF — Braille Ready Format, Library of Congress fdd000551). View Grade 1 instead.

Download .brf — Grade 2 Download .brf — Grade 1 Plain-text reader .txt

566,524 braille cells · 598 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.