The Orbits of the Asteroids.-The Problems of Mathematical
Astronomy.-The Motion of the Moon and its Perplexing
Inequalities.-A Visit to the Paris Observatory to search for
Forgotten Observations.-Wonderful Success in finding Them.-
The Paris Commune.-The History of the Moon's Motion carried back
a Century.-The Harvard Observatory.-The "Nautical Almanac" Office
and its Work.-Mr. George W. Hill and his Work.-A Wonderful
Algebraist.-The Meridian Conference of 1884, and the Question
of Universal Time.-Tables of the Planets completed.-
The Astronomical Constants.-Work unfinished.