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Online puzzle Abbas ibn Firnas

Abbas ibn Firnas

Abu al-Qasim Abbas ibn Firnas ibn Wirdas al-Takurini (Arabic: أبو القاسم عباس بن فرناس بن ورداس التاكرني; c. 809/810 – 887 A.D.), also known as Abbas ibn Firnas (Arabic: عباس ابن فرناس) was an Andalusi polymath: an inventor, astronomer, physician, chemist, engineer, Andalusi musician, and Arabic-language poet. He was reported to have experimented with unpowered flight.Ibn Firnas made various contributions in the field of astronomy and engineering. He constructed a device which indicated the motion of the planets and stars in the Universe. In addition, ibn Firnas came up with a procedure to manufacture colourless glass and made magnifying lenses for reading, which were known as reading stones.