Chemical Engineering - 1930

• Astronomer Clyde Tombaugh, 24, of the Lowell Observatory at Flagstaff, Arizona, discovers the planet Pluto. (1930)
  The first packages of frozen food, developed by Clarence Birdseye, appears on the shelves of 10 grocery stores in Springfield, Mass. (1930)
• Nazis win 107 seats in the German Parliament. (1930)
• Berkeley physicist, Ernest Lawrence, invents the cyclotron, i.e., an atom smasher. (1930)