What Were Reading Stones?

historical-nonfiction:

image

Little round rocks of clear, polished glass, reading stones magnified anything underneath them. They were intended to help people with poor eyesight to read. Reading stone were invented in the 800s CE by Arab poet, and of course inventor, Abbas Ibn Firnas.

Reblogged 2 years ago from chess-and-snickers-deactivated2 (Originally from historical-nonfiction)
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Source: historical-nonfiction
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