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Sunday, January 24, 2021

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Ephemeris

Posted to Maritime Musings (by Dennis Bryant) on February 17, 2015

An ephemeris is a calendar giving the positions of naturally-occurring astronomical objects and, these days, artificial satellites in the sky at given times. Originally, the ephemerides were developed by and for astronomers at particular observatories.

Henry Miller Shreve

Posted to Maritime Musings (by Dennis Bryant) on July 9, 2013

Henry Miller Shreve (1785-1851) was a riverboat captain and inventor. Born in New Jersey, he moved with his family in 1788 to a homestead in western Pennsylvania on the Youghiogheny River. After his father’s death in 1799, he served on several riverboats, soon owning one of his own.