D. APPLETON AND COMPANY'S PUBLICATIONS. 
RICHARD A. PROCTOR'S WORKS. 
ZITHER WORLDS THAN OURS: The Plurality 
^^ of Worlds, Studied under the Light of Recent Scientific Re- 
searches. With Illustrations, some colored. i2mo. Cloth, 
$1.75. 
Contents.— Introduction.— What the Earth teaches us.— What we learn from 
the Sun. — The Inferior Planets. — Mars, the Miniature of our Earth.— Jupiter, the 
Giant of the Solar System.— Saturn, the Ringed World.— Uranus and Neptune, the 
Arctic Planets. — Tne Moon and other Satellites. — Meteors and Comets : their Office 
in the Solar System. — Other Suns than Ours. — Of Minor Stars, and of the Distri- 
bution of Stars in Space.— The Nebulae : are they External Galaxies ? — Supei vision 
and Control. 
o 
UR PLACE AMONG INFINITIES. A Series 
of Essays contrasting our Little Abode in Space and Time with 
the Infinities around us. To which are added Essays on the 
Jewish Sabbath and Astrology. i2mo. Cloth, $1.75. 
Contents.— Past and Future of the Earth . —Seeming Wastes in Nature.— New 
Theory of Life in other Worlds.— A Missing Comet.— The Lost Comet and its Me- 
teor Train. — Jupirer.— Saturn and its System. — A Giant Sun.— The Star Depths. — 
Star Gauging. — Saturn and the Sabbath of the Jews. — Thoughts on Astrology. 
H^HE EXPANSE OF HEAVEN. A Series of 
-*• Essays on the Wonders of the Firmament. i2mo. Cloth, 
$2.00. 
Contents.— A "Dream that was not all a Dream.— The Sun. — The Queen of 
Night.— The Evening Star.— The Ruddy Planet.— Life in the Euddy Planet.— The 
Prince of Planets.— Jupiter's Family of Moons.— The Ring-Girdled Planet.— New- 
ton and the Law of the Universe. — The Discovery of Two Giant Planets.— The 
Lost Comet. — Visitants from the Star Depths. — Whence come the Comets ?— The 
Comet Families of the Giant Planets. — The Earth's Journey through Showers.— 
How the Planets Grew.— Our Daily Light.— The Flight of Light.— A Cluster of 
Suns. — Worlds ruled by Colored Suns. — The King of Suns. — Four Orders of Suns. 
—The Depths of Space.— Chartirfg the Star Depths.— The Star Depths Astir with 
Life.— The Drifting Stars.— The Milky W^ay. 
'HE MOON: Her Motions, Aspect, Scenery, and 
Physical Conditions. With Three Lunar Photographs, Map, 
and Many Plates, Charts, etc. i2mo. Cloth, $2.00. 
Contents.— The Moon's Distance, Size, and Mass.— The Moon's Motions.— 
fhe Moon's Changes of Aspect, Rotation, Libration, etc.— Study of the Moon s 
Surface. — Lunar Celestial Phenomena. — Condition of the Moon's Surface.— Index 
to the Map of the Moon. 
T IGHT SCIENCE FOR LEISURE HOURS. 
* A Series of Familiar Essays on Scientific Subjects, Natural 
Phenomena, etc. i2mo. Cloth, $1.75. 
T 
D. APPLETON AND COMPANY, NEW YORK. 
