Figure 18.— Orrery by Joseph Pope completed in 1787 for Harvard University. 

 Engraved plates and bronze figures were made by Paul Revere. The orrery 

 is GVi ft. in diameter and 6)^ ft. high. The twelve figures at the corners are 

 said to have been carved in wood by Simeon Skillin and cast in bronze by 

 Paul Revere. Photo courtesy Harvard University. 



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