20th century inventions

1
20th century inventions

• Izera Melton tyasia Hayden
• Ms. Lambert 8.2
• May 23, 2008

2
Mechanical television

• John Logie Baird (1888-1946) was a Scottish
  inventor and engineer who was a pioneer in the
  development of mechanical television.
• Baird developed a color television in 1928,
• a stereo television in 1946

3
CHOCOLATE CHIPS

• Ruth Wakefield invented chocolate chips (and
  chocolate chip cookies) in 1930.
• Her new cookie invention was called the "Toll
  House Cookie."
• Her original cookies used broken-up bars of
  semi-sweet chocolate.

4
Crayons

• Crayons were invented by Edwin Binney and Harold
  Smith.
• Binney and Smith invented the modern-day crayon
  by combining paraffin wax with pigments
  (colorants).
• These inexpensive art supplies were an instant
  success since they were first marketed as Crayola
  crayons in 1903.

5
Slinky

• The Slinky TM was invented by the engineer
  Richard James (1914-1974) in 1943.
• James invented a manufacturing machine that could
  make a Slinky TM from 80 feet of steel wire in 10
  seconds.
• His wife Betty James (1918- ) named the Slinky TM
  and runs the company that produces it.

6
The end
7
Citations