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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.