MODERN SCIENCE SERIES. 



Edited by Sir John Lubbock, Bart., F. R. S. 



The Cause of an Ice Age. 



By Sir ROBERT BALL, LL. D., F. R. S., Royal Astronomer of 

 Ireland ; Author of " Star Land," " The Story of the Sun," etc. 

 I2mo. Cloth, $1.50. 



" A fascinating subject, cleverly related and almost colloquially discussed." 

 Philadelphia Public Ledger, 



The Horse. 



A Study in Natural History. By WILLIAM H. FLOWER, C. B., 

 Director in the British Natural History Museum. With 27 Illustra- 

 tions, izmo. Cloth, $1.00. 



"The author admits that there are 3,800 separate treatises on the horse already 

 published, but he thinks that he can add something to the amount of useful informa- 

 tion now before the public, and that something not heretofore written will be found 

 in this book. The volume gives a large amount of information, both scientific and 

 practical, on the noble animal of which it treats." A'. Y. Commercial Advertiser. 



The Oak. 



A Popular Introduction to Forest Botany. By H. MARSHALL 

 WARD, F, R. S. With 53 Illustrations. I2mo. Cloth, $1.00. 



"From the acorn to the timber which has figured so gloriously in English ships 

 and houses, the tree is fully described, and all its living and preserved beauties and 

 virtues, in nature and in construction, are recounted and pictured." Brooklyn 

 Eagle. 



Ethnology in Folklore. 



By GEORGE C. GOMME, F. S.A., President of the Folklore Society, 

 etc. I2mo. Cloth, $1.00. 



" The author puts forward no extravagant assumptions, and the method he points 

 out for the comparative stud^ of folklore seems to promise a considerable extension 

 of knowledge as to prehistoric times." Independent. 



The Laws and Properties of Matter. 



By R. T. GLAZEBROOK, F. R. S., Fellow of Trinity College, 

 Cambridge. I2mo. Cloth, $1.00. 



" It is astonishing how interesting such a book can be made when the author has 

 a perfect mastery of his subject, as Mr. Glazebrook has. One knows nothing of the 

 world in which he lives until he has obtained some insight of the properties of matter 

 as explained in this excellent work." Chicago Herald. 



The Fauna of the Deep Sea. 



By SYDNEY J. HICKSON, M. A., Fellow of Downing College, 

 Cambridge. With 23 Illustrations. I2mo. Cloth, $1.00. 



" That realm of mystery and wonders at the bottom of the great waters is gradually 

 being mapped and explored and studied until its secrets seem no longer secrets. , . . 

 This excellent book has a score of illustrations and a careful index to add to its 

 value, and in every way is to be commended for Us interest and its scientific merit." 

 Chicago Times. 



D. APPLETON AND COMPANY, NEW YORK. 



