Bifocals are more effective because they have two spectacles not just once. Ordinary glasses were still around but the bifocals were used with people with really poor vision. While working on all these projects Ben had time to come up with the first political cartoon called, "Join or Die." It appeared in the Pennsylvania Gazette. Political cartoons were used for people to express there ideas through a comic, the were usually funny but had a point that the author was trying to make. One of Ben"s most helpful discoveries was the discovery of vitamin C. .

             Before Ben discovered vitamin C he encouraged the eating of citrus fruits, such as oranges, limes, and grapefruits. All those fruits have vitamin C which shows that Ben knew about the vitamin before he discovered it . Recognizing the healthy advantages of fruits, Ben came up with the saying, "An apple a day keeps the doctor away." He discovered fruits helped maintain the gums and skin. After the discovery Ben found out what it was used for and how it helped the body. The discovery Ben is famous for is the discovery of electricity. Before the discovery of electricity, electricity was generated by rubbing glass tubes with silk. Before Ben discovered it he always thought that lightning was an electrical current. Ben decided to tie a metal key to a string attached to a kite. The lightning struck the kite and traveled down to the key. Everybody thought Ben invented electricity. He didn"t, however Ben did invent the lightning rod. .

             From the discovery Ben made a lightning rod which protects buildings, people, and ships by keeping lightning away from them. Ben found out that lightning is a stream of electrified air known as plasma. Franklin was one of the first people to chart the Gulf Stream. Since Ben spent so much time traveling from America to Europe he was able to measure different temperatures in the Atlantic Ocean and chart the stream in detail.