General Knowledge-10


The Hungarian brothers, Laszlo and George Biro, made the first ball point pen in 1894. It followed the first workable fountain pen which was invented by L.E. Waterman in 1884.

John Boyd Dunlop, a veterinary surgeon, invented the pneumatic tyre in 1887.

Marie Curie  discovered the radioactive element radium.

Joseph F. Glidden was born in New York on Jan. 18, 1812. He invented barbed wire in 1873 and was granted the patent on  24November 1874. After a three year battle over the patent, which he eventually won, Gidden became known as the “Father of Barbed Wire”.

Charles Richter invented the scale used to measure the magnitude of earthquakes.

Dr. Hans von Ohain and Sir Frank Whittle are recognized as the co-inventors of the jet engine. Each was working separately and knew nothing of the others work. Although Whittle started first, von Ohain was first to design and develop a turbojet engine to power an aircraft. In 1991 the most significant honor “The Charles Draper Prize”  given to both Hans von Ohain and Sir Frank Whittle for their efforts and contributions to aviation and mankind. “The Charles Draper Prize” is recognized as the equivalent to the Nobel Prize in technology.

Alexander Graham Bell’s notebook entry of 10 March 1876 describes his successful experiment with the telephone. Speaking through the instrument to his assistant, Thomas A. Watson, in the next room, Bell utters these famous first words, “Mr. Watson — come here — I want to see you”.

Genetic Engineering, the technique of DNA cloning was perfected by Stanley Cohen and Herbert Boyer in 1973.

The toothbrush invented in 1770. The first toothbrush was made out of a bone and small brush, by jail prisoner William Addis of England.