1. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

2. Who invented Morphine ?

Answer: Friderich Sertumer of Germany in 1805

3. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm

4. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

5. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

6. Who invented Vaccine of Rabies ?

Answer: Louis Pasteur of France in 1885

7. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712