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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.