and height. A bob of lead was the same as bob of cork. He released the two at the same time after he pulled them both back about five degrees. Then he saw that after the cork pendulum stopped the lead pendulum kept going. He that the average number of swings for the cork bob was less than the average number of swing for the lead bob. Galileo claimed that the pendulum period was different from the height at which they are released in Two New Sciences. To get to his conclusion he suspended two pendulums with identical lead bobs. He released them at the same time from different angles. One was pulled back about 5 degrees while the other was released from about 45 degrees. The pendulum pulled back five degrees was allowed to travel through thirty cycles, and the numbers of complete swings of the other pendulum during this time were counted. The pendulum which traveled through the larger angle had a longer period. He saw that pendulums with different release heights do not have the same period. It appeared that pendulums with larger release heights have
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