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Pages 8 & 9, with Leonardo da Vinci's drawing of a flying machine and a bicycle model based upon da Vinci's drawing of a bicycle. |
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Pages 18 & 19, pictures and text about: (1) John Boyd Dunlop who invented the pneumatic tire for bicycles in 1888, and (2) the Schwinn Sting-Ray which was very popular starting in the 1960's. |
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