As a composer and pianist, Beethoven experimented extensively with pedal. Prior to independence, several colonies had already experimented with term limits. They also have experimented with emerging technologies. Different vendors have experimented with different coolants. Morse had experimented with underwater telegraph circuits since 1842. Instead it experimented with different shapes particularly towers. In the mid-1980s he experimented with Roland guitar synthesizers. They also have experimented with new wave and disco sounds on several albums. Before this, Rowntree had already experimented with different Polos in the 1980s. In his later years, Wagner experimented continually. While in America, he had experimented with a novel. Keane experimented with new techniques, like animating sweat. African-Americans have been experimented on and exploited for centuries. Morisot actively experimented with charcoals and color pencils. He also often experimented with form in his stories.