Scientific Publications. 



THE HUMAN SPECXES. By A. Db QuATBBrAGES, Profeseor of Anthro- 

 pology in the Museum of Natural Histoiy^ PariB. ISmo, cloth, $2.00. 



The work treats of the unity, origin, antiquity, and ori^nal localization of 

 the homau 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. Witli 130 Original nins- 

 trations, and Frontispiece in Colors. By Oqdkn 17, Bood, Professor of 

 Physics in Columbia College. ISmo, cloth, $3.00. 



"In this interesting hook Professor Hood, who, as a dislinEiiished Professor 

 of Physics in Colambia College, United States, must be accepted as a com;>etent 

 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 attributed to the fact that he is himself an accom- 

 pliBbed artist as well as an anthoritative expounder of science." — Edlvlmrgh 

 BetfkiB, OMber, 1879, in an article on " The P/iUoeqphy of Color." 



EDUCATION AS A SCIENCE. By Alexandeb Bais, LL. D. ISmo, 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."— itfeio YorkSm,. 



A HISTORY OF THE GROWTH OP THE STEAM-ENGINE. By 



RoBEBT H. Thubston, a. M., C. E., 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 histoiy Is a desideratum, and the readers of the present work will 

 agree that it could nave a no more amusing and intelligent historian than our 

 author."— jBoston Gazette. 



STUDIES IN SPECTRUM ANAI.TSIS. By J. NoBMAN Lookteb, P. E. S., 

 Correspondent of the Institute of France, etc. With 60 Illnsteations. 12mo, 

 cloth, $2.50. 



" The study of spectrum analysis is one fraught with a peculiar 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 page 

 to page, never flagging in interest in the natter before him, nor putting down 

 .the book until the last page is reacted."— ifea; Tork Evening Express. 



D. APPLETON & CO., Publishers, 



1, S, & 6 Bond Stbeet, New Yobx, 



