Big wheel
The first big wheel was shown in 1893 at the World Fair in Chicago. The engineer George Washington of Gayle Ferris-Jr. designed the legendary attraction In English the big wheel still is called Ferris.
Zipper
The first fastener - a lightning intended for footwear. It was shown at the World Fair in Chicago in 1893 Uitkom Leo Dzhadson
X-ray device
Properties of X-rays for the first time showed to public in 1901 at the World Fair in Buffalo
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