D. APPLETON & CO.'S PUBLICATIONS. 
MODERN SCIENCE SERIES. 
Edited by Sir JOHN LUBBOCK, Bart., F. R. S. 
'THE CA USE 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. 
" Sir Robert Ball's book is, as a matter of course, admirably written. Though but a 
small one, it is a most important contribution to geology." London Saturday Review. 
" A fascinating subject, cleverly related and almost colloquially discussed," Phila- 
delphia Public Ledger. 
E HORSE: A Study in Natural History. By 
WILLIAM H. FLOWER, C. B., Director in the British Natural 
History Museum. With 27 Illustrations. 
" The author admits that there are 3,800 separate treatises on the horse already pub 
lished, but he thinks th/ai he crui add something to the amount of useful information 
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." New York Commercial Advertiser. 
E 
OAK: A Study in Botany. By H. MARSHALL 
* WARD, F. R. S. With 53 Illustrations. 
" 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. 
TH NO LOGY IN FOLKLORE. By GEORGE L. 
GOMME, F. S. A., President of the Folklore Society, etc. 
"The author puts forward no extravagant assumptions, and the method he points 
out for the comparative study of folklore seems to promise a considerable extension of 
knowledge as to prehistoric times. " Independent. 
rHE LAWS AND PROPERTIES OF MAT- 
TER. By R. T. GLAZEBROOK, F. R. S., Fellow of Trinity 
College, Cambridge. 
" 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 FA UNA OF THE DEEP SEA. By SYDNEY 
J. HICKSON, M. A., Fellow of Downing College, Cambridge. 
With 23 Illustrations. 
" 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, 
\nd in every way is to be commended for its interest and its scientific merit." 
Times. 
Each, lamo, cloth, $1.00. 
New York: D. APPLETON & CO., 72 Fifth Avenue, 
