May 18 1980 Mount St. Helens blew its top in Washington State. May 18 1933 TVA Act signed by President Roosevelt. May 18 1830 Edwin Budding of England signs an agreement for manufacture of his invention, the lawn mower. Saturdays are destroyed forever.
May 18 1956 Sugar Ray Leonard, boxer. May 18 1918 Pope John Paul II. May 18 1850 Oliver Heaviside, physicist who predicted the existance of the ionosphere, used to reflect radio waves.