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D. APPLETON & CO.'S PUBLICATIONS. 



RICHARD A. PROCTOR'S WORKS. 



r\THER WORLDS THAN OURS: The Plurality 

 \*J of Worlds, Studied under the Light of Recent Scientific Re- 

 searches. By RICHARD ANTHONY PROCTOR. With Illustra- 

 tions, 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. The 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 ? Supervision 

 and Control. 



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. Jupiter. Saturn and its System. A Giant Sun. The Star Depths. 

 Star Gauging. Saturn and the Sabbath of the Jews. Thoughts on Astrology. 



rTHE 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 Ruddy 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. Charting the Star Depths. The Star Depths Astir with 

 Life. The Drifting Stars. The Milky Way. 



"HE MOON : Her Motions, Aspect, Scenery, and Phys- 

 ical 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. 

 The 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. 



IGHT SCIENCE FOR LEISURE HOURS. A 



Series of Familiar Essays on Scientific Subjects, Natural Phe- 

 nomena, etc. I2mo. Cloth, $1.75. 



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