Question 21 :
What did cardiologist Dr. Paul Zoll invent in Massachusetts in 1952?
The pacemaker is an electrical device that regulates the heartbeat.
Question 22 :
What Elmer A. Sperry invented?
Invented in 1911.
Question 23 :
For over 500 years, paper was only available and sold as single sheets. In 1902, an inventive Australian used half size sheets of paper, a bit of glue and cardboard to create the what?
Birchall's of Launceston in Tasmania started selling the world's first notepads, calling them 'Silvercity Writing Tablets' after J A Birchall thought it would be a good idea to back sheets of paper with cardboard and glue them together at the top. His British paper suppliers weren't so keen, but, they were persuaded by Birchall that it was a good idea!
Question 24 :
Who developed the idea of Crop Rotation?
Viscount Charles 'Turnip' Townsend developed this revolutionary concept.
Question 25 :
CORN FLAKES - Who made them first?
Will Keith Kellogg discovered the corn flake, by mistake, in 1906. They were the result of an experiment which went wrong.