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General Knowledge on Inventions | GK Test on Inventions Page 20
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Inventions

General Knowledge on Inventions

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191. Who was discovered blood circulation? 
192. Who was the discovered of Beri Beri? 
193. What wasToricelli invented?
194. Who was discovered air conditioner was discovered?
195. Which year was invented first gasoline-powered tractor by John Froelich?
196. Which is used to measure alkalinity or acidity of a liquid was invented "Electronic instrument"?
197. Which name of first personal computer controlled with a keyboard?
198.  Who was invented Playing cards in 9th century?
199. In which year italy are invented eyeglasses?  
200. In which year was built first freely programmable computer in world? 

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