an.--A Wonderful Star.

IV
LIFE AND WORK AT AN OBSERVATORY
A Professor, United States Navy.--The Naval Observatory in 1861.--
Captain Gilliss and his Plans.--Admiral Davis.--A New Instrument
and a New Departure.--Astronomical Activity.--The Question of
Observatory Administration.--Visit from the Emperor of Brazil.--
Admiral John Rodgers.--Efforts to improve the Work of the
Observatory.

V
GREAT TELESCOPES AND THEIR WORK
Curious Origin of the Great Washington Telescope.--Congress
is induced to act.--A Case of Astronomical Fallibility.--
The Discovery of the Satellites of Mars.--The Great Telescope
of the Pulkova Observatory.--Alvan Clark and his Sons.--A Sad
Astronomical Accident.

VI
THE TRANSITS OF VENUS
Old Transits of Venus.--An Astronomical Expedition in the 18th
Century.--Father Hell and his Observations.--A Suspected Forger
vindicated.--The American Commission on the Transit of Venus.--
The Photographic Method to be applied.--Garfield and the
Appropriation Committee.--Weather Uncertainties.--Voyage to
the Cape of Good Hope.--The Transit of 1882.--Our Failure to
publish our Observations.

VII
THE LICK OBSERVATORY
James Lick and his Ideas.--Mr. D. O. Mills.--Plans for the Lick
Observatory.--Edward E. Barnard.--Professor Holden.--Wonderful
Success of the Observatory.

VIII
THE AUTHOR'S SCIENTIFIC WORK
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.

IX
SCIENTIFIC WASHINGTON
Professor Henry and the Smithsonian Institution.--
Alumni Associations.--The Scientific Club.--General Sherman.--
Mr. Hugh McCulloch.--A Forgotten Scientist.--The National Academy of
Sciences.--The Geological Survey of the Territories.--The Government
Forestry System.--Professor O. C. Marsh.--Scientific Humbugs.--
Life on the Plains.

X
SCIENTIFIC ENGLAND
My First Trip to Europe.--Mr. Thomas Hughes.--Mr. John Stua