Article Detail Who invented Vitamin A ? Answer: Mc Collum and M.Davis of U.S.A. in 1913 Similar Questions : 1. Who invented Barometer ? Answer: Evangelista Torricelli of Italy in 1644 2. Who invented Neutron ? Answer: JAMES CHADWICK in 1932 3. Who invented Circulation of blood ? Answer: William Harvey of Britain in 1628 4. Who invented c language Answer: Dennis Ritchie 5. Who invented Chloroform as anaesthetic ? Answer: James Simpson of Britain in 1847. 6. Who invented DNA Structure ? Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951 7. Who invented Diesel Engine ? Answer: Rudoff Diesel of Germany in 1895 Read more from - Important Inventions