D. APPLETON & CO.'S PUBLICATIONS. 



DISCUSSIONS ON CLIMATE AND COSMOLOGY. By 



JAMES CROLL, LL. D., F. R. S. With Chart. 12mo. Cloth, $2.00. 



CONTENTS: Misapprehensions regarding the Physical Theory of Secular 

 Changes of Climate. Tlie Ice of Greenland and the Antarctic Continent not due 

 to Elevation of the Land. Mr. Alfred JR. Wallace's Modification of the Physical 

 Theory of Secular Changes of Climate The Physical Cause of Mild Polar Cli- 

 mates. Intenjlacial Periods and Distribution of Flora and Fauna in Arctic 

 Regions. Temperature of Space and its Bearing on Terrestrial Physics. Prob- 

 able Origin and Age of the Sun's Heat, etc., etc. 



CLIMATE AND TIME IN THEIR GEOLOGICAL RE- 

 LATIONS: A THEORY OF SECULAR CHANGES OF THE 

 EARTH'S CLIMATE. By JAMES CROLL, of H. M. Geological Survey 

 of Scotland. With Maps and Illustrations. 12mo. Cloth, $2.50. 



"I have studiously avoided introducing anything of a hypothetical character. 

 All the conclusions are based on known facts or admitted physical principles. 

 In short, the aim of the work is to prove that secular changes of climate follow, 

 aa a necessary effect, from admitted physical agencies, and that these changes, 

 in as far as the past climatic condition of the globe is concerned, fully meet the 

 demand of the geologist." From the Preface. 



OTHER WORLDS THAN OURS: THE PLURALITY OF 

 WORLDS, STUDIED UNDER THE LIGHT OF RECENT SCI- 

 ENTIFIC RESEARCHES. By RICHARD ANTHONY PROCTOR. With 

 Illustrations, some colored. 12mo. Cloth, $2.50. 



LIGHT SCIENCE FOR LEISURE HOURS. A Series of 

 Familiar Essays on Scientific Subjects, Natural Phenomena, etc. By 

 RICHARD ANTHONY PROCTOR. 12mo. Cloth, $1.75. 



THE MOON: HER MOTIONS, ASPECT, SCENERY, AND PHYS- 

 ICAL CONDITIONS. With Three Lunar Photographs, and many 

 Plates, Charts, etc. By RICHARD ANTHONY PROCTOR. 8vo. Cloth, 

 $3.50. 



THE EXPANSE OF HEAVEN. A Series of Essays on the 



Wonders of the Firmament. By RICHARD ANTHONY PROCTOR. 

 12mo. Cloth, $2.00. 



OUR PLACE AMONG INFINITIES. A Series of Essays con- 

 trasting our Little Abode in Space and Time with the Infinities 

 around us. To which are added Essays on the Jewish Sabbath and 

 Astrology. By RICHARD ANTHONY PROCTOR. 12mo. Cloth, $1.75. 



New York : D. APPLETON & CO., 1, 8, & 5 Bond Street. 



