We all know about Benjamin Franklin, He was a very famous American political leader. He was also the first man to discover electricity. He had strong interest in learning about new things.
One day he heard from a friend that something black in color holds the heat better than something white in color. Franklin wanted to find out if it is true or not by practice.
One winter, he went to the north and found snow on the ground. He put two large pieces of cloth over the snow. One piece of cloth was black in color. the other was white. He waited and waited until the sun began to shine. After several hours，he looked under the piece of cloth and saw that the snow under the white cloth melted （溶化） little while the snow under the black cloth was melted much more. Happily, he got the result of the test and put down the whole course（过程）.