Scientific Publications. 
THE HUMAN SPECIES. By A. DE QUATREFAGES, Professor of Anthro- 
pology in the Museum of Natural History, Paris. 12mo, cloth, $2.00. 
The work treats of the unity, origin, antiquity, and original localization of 
the human species, peopling of the globe, acclimatization, primitive man, forma- 
tion of the human races, fossil human races, present human races, and the physi- 
cal and psychological characters of mankind. 
STUDENTS' TEXT-BOOK OF COtOR ; or, MODERN CHROMAT- 
ICS. With Applications to Art and Industry. With 130 Original Illus- 
trations, and Frontispiece in Colors. By OGDEN N, ROOD, Professor of 
Physics in Columbia College. 12mo, cloth, $2.00. 
"In this interesting book Professor Rood, who, as a distinguished Professor 
of Physics in Columbia College, United States, must be accepted as a competent 
authority on the branch of science of which he treats, deals briefly and succinctly 
with what may be termed the scientific rationale of his subject. But the chief 
value of his work is to be attribute ti the fact that he is himself an accom- 
plished artit as well as ^uo.iuritative expounder of science." Edinburgh, 
Review, October, 187C, tn u/ article on " The Philosophy of Color." 
AS A SCIENCE. By ALEXANDER BAIN, LL. D. 12mo, cloth, 
$1.75. 
" This work must be pronounced the most remarkable discussion of educa- 
tional problems which has been published in our day. We do not hesitate to 
bespeak for it the widest circulation and the most earnest attention. It should 
be in the hands of every school-teacher and friend of education throughout the 
land." New York Sun. 
A HISTORY OF THE GROWTH OF THE STEAM-ENGINE. By 
ROBERT H. THURSTON, A. M., C. B., Professor of Mechanical Engineering 
in the Stevens Institute of Technology, Hoboken, N. J., etc. With 163 
Illustrations, including 15 Portraits. 12mo, cloth, $2.50. 
" Professor Thurston almost exhausts his subject ; details of mechanism are 
followed by interesting biographies of the more important inventors. If, as is 
contended the steam-engine is the most important physical agent in civilizing 
the world, its history is a desideratum, and the readers of the present work will 
agree that it could have a no more amusing and intelligent historian than our 
author." Boston Gazette. 
STUDIES IN SPECTRUM ANALYSIS. By J. NORMAN LOCKTER, F. R. 8 , 
Correspondent of the Institute of Prance, etc. With 60 Illustrations. 12mo, 
Cloth, $2.50. 
"The study of spectrum analysis is one fraught with a pecnliar fascination. 
and some of the author's experiments are exceedingly picturesque in their re- 
sults They are so lucidly described, too. that the reader keeps on, from paire 
to page never flawing in interest in the natter before him, nor putting down 
the book until the last page is reached." New York Evening Express. 
D. APPLETON & CO., Publishers, 
1, 3, & 6 BOND STREET, NEW YOBK. 
