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Natural Philosophy ⠃⠗⠋ 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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⠊⠝⠞⠑⠛⠗⠁⠇⠀⠝⠥⠍⠃⠻⠎⠂⠀⠃⠑⠉⠁⠥⠎⠑⠀⠷⠀⠊⠞⠎⠀⠀ ⠋⠥⠝⠙⠁⠍⠢⠞⠁⠇⠀⠎⠊⠍⠏⠇⠊⠉⠊⠞⠽⠀⠯⠀⠗⠑⠛⠥⠇⠜⠊⠞⠽⠂⠀⠊⠎⠀⠃⠽ ⠀⠋⠜⠀⠮⠀⠃⠑⠌⠀⠃⠁⠎⠊⠎⠀⠷⠀⠀⠉⠕⠤⠕⠗⠙⠔⠁⠞⠊⠕⠝⠲⠀⠠⠿⠀⠱⠊⠇⠑ ⠀⠁⠗⠊⠹⠍⠑⠞⠊⠉⠀⠯⠀⠮⠀⠮⠕⠗⠽⠀⠷⠀⠝⠥⠍⠃⠻⠎⠀⠛⠊⠧⠑⠀⠥⠀⠁⠀⠀ ⠍⠕⠌⠀⠹⠕⠗⠳⠛⠓⠀⠁⠉⠟⠥⠁⠔⠞⠁⠝⠉⠑⠀⠾⠀⠮⠀⠏⠑⠉⠥⠇⠊⠜⠊⠞⠊⠑⠎⠀ ⠷⠀⠹⠊⠎⠀⠛⠗⠳⠏⠂⠀⠺⠑⠀⠀⠎⠑⠉⠥⠗⠑⠀⠃⠽⠀⠮⠀⠏⠗⠕⠉⠑⠎⠎⠀⠷⠀ ⠉⠕⠤⠕⠗⠙⠔⠁⠞⠊⠕⠝⠀⠮⠀⠐⠗⠀⠞⠕⠀⠏⠗⠑⠎⠥⠏⠏⠕⠎⠑⠀⠘⠮⠀⠀ ⠏⠑⠉⠥⠇⠊⠜⠊⠞⠊⠑⠎⠀⠯⠀⠮⠀⠏⠕⠎⠎⠊⠃⠊⠇⠊⠞⠽⠀⠷⠀⠋⠔⠙⠬⠀⠮⠍⠀ ⠁⠛⠁⠔⠀⠔⠀⠑⠀⠕⠮⠗⠀⠀⠛⠗⠳⠏⠀⠱⠊⠡⠀⠺⠑⠀⠓⠀⠉⠕⠤⠕⠗⠙⠔⠁⠞⠫⠀⠾ ⠀⠮⠀⠝⠥⠍⠻⠊⠉⠁⠇⠀⠛⠗⠳⠏⠲⠀⠠⠮⠀⠉⠜⠗⠽⠬⠀⠀⠕⠥⠞⠀⠷⠀⠎⠥⠡⠀ ⠉⠕⠤⠕⠗⠙⠔⠁⠞⠊⠕⠝⠀⠊⠎⠀⠉⠁⠇⠇⠫⠀⠉⠳⠝⠞⠬⠂⠀⠯⠀⠋⠀⠮⠀ ⠏⠗⠑⠍⠊⠎⠑⠎⠀⠀⠍⠁⠙⠑⠀⠭⠀⠋⠕⠇⠇⠪⠎⠀⠞⠀⠺⠑⠀⠉⠀⠉⠳⠝⠞⠀⠁⠇⠇⠀ ⠹⠬⠎⠀⠔⠀⠎⠀⠋⠜⠀⠵⠀⠺⠑⠀⠙⠊⠎⠗⠑⠛⠜⠙⠀⠀⠸⠮⠀⠙⠊⠋⠋⠻⠢⠉⠑⠎⠲⠀ ⠠⠺⠑⠀⠉⠳⠝⠞⠀⠱⠢⠀⠺⠑⠀⠉⠕⠤⠕⠗⠙⠔⠁⠞⠑⠀⠔⠀⠞⠥⠗⠝⠀⠐⠕⠀ ⠍⠑⠍⠃⠻⠀⠷⠀⠁⠀⠛⠗⠳⠏⠀⠁⠋⠞⠻⠀⠁⠝⠕⠮⠗⠀⠀⠾⠀⠮⠀⠍⠑⠍⠃⠻⠎⠀⠷⠀ ⠮⠀⠝⠥⠍⠃⠻⠀⠎⠻⠊⠑⠎⠀⠞⠀⠎⠥⠉⠉⠑⠫⠀⠐⠕⠀⠁⠝⠕⠮⠗⠀⠥⠝⠞⠊⠇⠀⠀⠮ ⠀⠛⠗⠳⠏⠀⠞⠕⠀⠃⠑⠀⠉⠳⠝⠞⠫⠀⠊⠎⠀⠑⠭⠓⠁⠥⠌⠫⠲⠀⠠⠮⠀⠇⠁⠌⠀ ⠝⠥⠍⠃⠻⠀⠗⠑⠟⠥⠊⠗⠫⠀⠿⠀⠮⠀⠀⠉⠕⠤⠕⠗⠙⠔⠁⠞⠊⠕⠝⠀⠊⠎⠀⠉⠁⠇⠇⠫ ⠀⠮⠀⠎⠥⠍⠀⠷⠀⠮⠀⠍⠑⠍⠃⠻⠎⠀⠷⠀⠮⠀⠉⠳⠝⠞⠫⠀⠛⠗⠳⠏⠲⠀⠀⠠⠎⠔⠉⠑ ⠀⠮⠀⠝⠥⠍⠃⠻⠀⠎⠻⠊⠑⠎⠀⠉⠕⠝⠞⠔⠥⠑⠎⠀⠊⠝⠙⠑⠋⠔⠊⠞⠑⠇⠽⠂⠀⠑⠀ ⠛⠊⠧⠢⠀⠛⠗⠳⠏⠀⠉⠀⠃⠑⠀⠀⠉⠳⠝⠞⠫⠲⠀⠀⠀⠀⠠⠝⠥⠍⠻⠁⠇⠎⠀⠓⠀⠃⠑⠢ ⠀⠉⠕⠤⠕⠗⠙⠔⠁⠞⠫⠀⠾⠀⠝⠁⠍⠑⠎⠀⠵⠀⠺⠑⠇⠇⠀⠵⠀⠾⠀⠎⠊⠛⠝⠎⠲⠀⠀ ⠠⠮⠀⠿⠍⠻⠀⠁⠗⠑⠀⠙⠊⠋⠋⠻⠢⠞⠀⠔⠀⠮⠀⠙⠊⠋⠋⠻⠢⠞⠀ ⠇⠁⠝⠛⠥⠁⠛⠑⠎⠂⠀⠮⠀⠇⠁⠞⠞⠻⠀⠁⠗⠑⠀⠀⠊⠝⠞⠻⠝⠁⠞⠊⠕⠝⠁⠇⠂⠀⠞⠀ ⠊⠎⠂⠀⠮⠽⠀⠓⠀⠮⠀⠎⠁⠍⠑⠀⠿⠍⠀⠔⠀⠁⠇⠇⠀⠇⠁⠝⠛⠥⠁⠛⠑⠎⠲⠀⠠⠋⠀⠀
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.