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Practical Talks by an Astronomer ⠃⠗⠋ 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.

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222,865 braille cells · 233 embossed pages at 40×25 · 728 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.