In 1843 John was a "star", laying the cornerstone for the first professional one of these in the U.S., on Mt. Adams
These were received very enthusiastically, for he had a genius for describing the 
... was referred to by John Quincy Adams, President of the United States, in his 
first ... On November 9, 1843, the cornerstone was laid by John Quincy Adams, 
who... [DOC] [TLE] How Time Balls Worked - Cincinnati Observatory [PAR] Jul 1, 2014 ... and one of displaying solar time, are achieved by a shadow ...