Opinions of the Press on the “‘ International Scientific Series. 
The Study ‘of Sociology. 
By HERBERT SPENCER. 
1vol.,12mo. Cloth . . . . 1. 6 « « « «© « « Price, $1.50. 
“The philosopher whose distinguished name gives weight and influence to this vol- 
ume, has given in its pages some of the finest specimens of reasoning in all its forms 
and departments. There is a fascination in his array of facts, incidents, and opinions, 
which draws on the reader to ascertain his lusi The y and cal ° 
his treatment of acknowledged difficulties and grave objections to his theories win for 
him a close attention and sustained effort, on the part of the reader, to comprehend, fol- 
low, grasp, and appropriate his principles. This book, independently of its bearing 
upon logy, is valuable as lucidly ing what those essential characteristics are 
which entitle any arrang and cc ion of facts and deductions to be called a 
sctence.” —Episcopalian. ; 
‘* This work compels admiration by the evidence which it gives of immense re- 
search, study, and observation, and is, withal, written in a popular and very pleasing 
style. It is a fascinating work, as well as one of deep practical thought.”—Sosz. Post. 
“Herbert Spencer is unquestionably the foremost living thinker in the psychological 
and sociological fields, and this volume is an important contribution to the science of 
which it treats. . . . It will prove more popular than any of its author’s other creations, 
for it is more plainly addressed to the people and has a more practical and less specu- 
lative cast. It will require thought, but it is well worth thinking about.”—4 Zany 
Evening Fournal. : 
The New Chemistry. 
By JOSIAH P. COOKE, Jr., 
Erving Professor of Chemistry and Mineralogy in Harvard University. 
1 vol., r2mo. Cloth .. .... . . . . « Price, $2.00. 
“The book of Prof. Cooke is a model of the modern popular science work. It has 
just the due proportion of fact, philosophy, and true romance, to make it a fascinating 
companion, either for the voyage or the study.” —Daily Graphic. 
“‘ This admirable monograph, by the distinguished Erving Professor of Chemistry 
in Harvard University, is the first American contribution to ‘The International Scien- 
tific Series,’ and a more attractive piece of work in the way of popular exposition upon 
a difficult subject has not appeared in along time. It not only well sustains the char- 
acter of the volumes with which it is iated, but its rep ion in European coun- 
tries will be an honor to American science.” —New York Tribune. 
“ All the chemists in the country will enjoy its perusal. and many will seize upon it 
asa thing longed for. For, to those advanced students who have kept well abreast of 
the chemical tide, it offers a calm philosophy. To those others, youngest of the class, 
who have emerged from the schools since new thods have prevailed, it presents a 
fetcelzacen, drawing to its use all the data, the relations of which the newly-fledged 
fact-seeker may but dimly perceive without its aid... . To the old chemists, Prof. 
Cooke's treatise is like a message from beyond the mountain. They have heard o! 
changes in the science; the clash of the battle of old and new theories has stirred them 
from afar. The tidings, too, had come that the old had given way ; and little more than 
this they knew. . . . Prof. Cooke’s ‘ New Chemistry’ must do wide service in bringing 
to close sight the little known and the longed for. . . . Asa philosophy it is elemen- 
tary, but, as a book of science, ordinary readers will find it sufficiently advanced.’’~ 
Utica Morning Herald. 
D. APPLETON & CO., Publishers, 549 & 551 Broadway, N. Y. 
