1. Who invented Logarithms ?

Answer:

John Napier (Scotland) invented Logarithm

2. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

3. Who invented Computer ?

Answer:

Charles Babbage

4. Who invented Neon Lamp ?

Answer:

Georges Claude who was a French engineer, chemist and inventor

5. Who invented Nylon ?

Answer:

Wallace Carothers

6. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879

7. Who invented Electron ?

Answer: Thomson. J of Britain in 1897