1 6 Scientific Works published by Longmans, Green, cr-> Co. 



WORKS BY RICHARD A. PROCTOftOMtMMM*. 



OTHER WORLDS THAN OURS: the Plurality of Worlds 



Studied Under the Light of Recent Scientific Researches. With 14 Illustrations; 

 Map, Charts, etc. Crown 8vo. , 3^. 6d. 



THE ORBS AROUND US; Essays on the Moon and Planets, 



Meteors and Comets, the Sun and Coloured Pairs of Suns. Crown 8vo. , 3^. 6d. 



LIGHT SCIENCE FOR LEISURE HOURS: Familiar Essays 



on Scientific Subjects. Natural Phenomena, etc. 3 vols. , crown 8vo. , 5.5. each 



THE EXPANSE OF HEAVEN : Essays on the Wonders of the 



Firmament. Crown 8vo. , y. 6d. 



OTHER SUNS THAN OURS : a Series of Essays on Suns Old, 



Young, and Dead. With other Science Gleanings. Two Essays on Whist, 

 and Correspondence with Sir John Herschel. With 9 Star-Maps and Diagrams. 

 Crown 8vo. , y. 6d. 



HALF-HOURS WITH THE TELESCOPE: a Popular Guide 



to the Use of the Telescope as a means of Amusement and Instruction. With 

 7 Plates. Fcp. 8vo. , zs. 6d. 



OUR PLACE AMONG INFINITIES : a Series of Essays con- 

 trasting our Little Abode in Space and Time with the Infinities around us. 

 Crown 8vo., 3^. 6d. 



ROUGH WAYS MADE SMOOTH. Familiar Essays on 



Scientific Subjects. Crown 8vo. , 3^. 6d. 



PLEASANT WAYS IN SCIENCE. Crown 8vo., 3 j. 6</. 



NATURE STUDIES. By R. A. PROCTOR, GRANT ALLEN, A. 

 WILSON, T. FOSTER, and E. CLODD. Crown 8\o., y. 6d. 



LEISURE READINGS. By R. A. PROCTOR, E. CLODD, A. 

 WILSON, T. FOSTER, and A. C. RANYARD. Crown 8vo. , y. 6J. 



NEW STAR ATLAS FOR THE LIBRARY, the School, and 



the Observatory, in Twelve Circular Maps (with Two Index-Plates). With an 

 Introduction on th"e Study of the Stars. Illustrated by 9 Diagrams. Crown 8vo. , 

 5-f- 



THE SOUTHERN SKIES : a Plain and Easy Guide to the 



Constellations of the Southern Hemisphere. Showing in 12 Maps the position 

 of the principal Star-Groups night after night throughout the year. With an 

 Introduction and a separate Explanation of each Map. True for every Year. 

 410., 5.v. 



HALF-HOURS WITH THE STARS: a Plain and Easy Guide 



to the Knowledge of the Constellations. Showing in 12 Maps the position of 

 the principal Star-Groups night after night throughout the year. With Intro- 

 duction and a separate Explanation of each Map. True for every Year. 

 410., y. 6d. 



LARGER STAR ATLAS FOR OBSERVERS AND STUDENTS. 



In Twelve Circular Maps, showing 6000 Stars, 1500 Double Stars, Nebula:, etc. 

 With 2 Index-Plates. Folio, iy. 



THE STARS IN THEIR SEASONS: an Easy Guide to a 



Knowledge of the Star-Groups. In 12 Large Maps. Imperial 8vo. . $s. 



