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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.