[ILLUSTRATIONS]

The Moon. First Quarter
Photographed by Loewy and Puiseux, February 13, 1894.
[Frontispiece]
FACING
PAGE
Spiral Nebula in Constellation Leo
Photographed by Keeler, February 24, 1900.
[26]
Nebula in Andromeda
Photographed by Barnard, November 21, 1892.
[28]
The "Dumb-Bell" Nebula
Photographed by Keeler, July 31, 1899.
[34]
Star-Field in Constellation Monoceros
Photographed by Barnard, February 1, 1894.
[84]
Solar Corona. Total Eclipse
Photographed by Campbell, January 22, 1898; Jeur, India.
[108]
Forty-Inch Telescope, Yerkes Observatory[170]
Yerkes Observatory, University of Chicago[176]

PRACTICAL TALKS
BY AN ASTRONOMER

[NAVIGATION AT SEA]

A short time ago the writer had occasion to rummage among the archives of the Royal Astronomical Society in London, to consult, if possible, the original manuscripts left by one Stephen Groombridge, an English astronomer of the good old days, who died in 1832. It was known that they had been filed away about a generation ago, by the late Sir George Airy, who was Astronomer Royal of England between the years 1835 and 1881. After a long search, a large and dusty box was found and opened. It was filled with documents, of which the topmost was in Sir George's own handwriting, and began substantially as follows:

"List of articles within this box.

"No. 1, This list,
"No. 2, etc., etc."