Works of Herbert Spencer published by D. Appleton & Co. 
The Philosophy of Herbert Spencer. 
FIRST PRINCIPLES; 
IN TWO PARTS: 
L THE UNKNOWABLE. IL LAWS OF THE KNOWABLE. 
In one Volume. 518 pages. 
“Mr. Spencer has earned an eminent and commanding position as a metaphysiclan, 
anf his ability, earnestness, and profundity, are in none of his former volumes s0 con- 
sprenous as inthis, There is not a crude thought, a flippant fling, or an irreverent in- 
sinaation in this book, notwithstanding that it has thing of the character of a 
daring and determined raid upon the old philosophies."—Chécago Journal. 
“This volume, treating of First Principles, like all Mr. Spencer's writings that have 
fallen under our observation, is distinguished for, cl dor, and 
that originality and fearlessness which ever mark the true philosophical spirit. His 
treatment of theological opinions is reverent and respectful, and his suggestions and 
arguments are such as to deserve, as they will compel, the earnest attention of all 
thoughtful students of first truths. Agreeing with Hamilton and Mansel in the gone- 
ral, on the unknowableness of the unconditioned, he nevertheless holds that their being 
is in a form asserted by consciousness.”—Christian Advocate, 
“The literary world has seen but few such authors as Herbert Spencer. There have 
been metaphysical writers in the same exalted sphere who before him have attempted 
to reduce the laws of nature to a rational system. But in the highest realm of philo- 
sophical investigation he stands head and shoulders above his pred ; not perh 
purely by force of superior intellect, but partly owing to the greater aid which the 
light of modern science has afforded him in the prosecution of his difficult task."— 
Boston Bulletin. 
“Mr. Spencer is achieving an enviable distinction by his contributions to the coun- 
try’s literature; bis system of philosophy is destined to become a work of no small 
renown. Its appearance at this time is an evidence that our people are not aid absorbed 
in war and its tragic events."—Ohio State Journal. 
“Mr, Spencer’s works will undoubtedly receive in this country the attention they 
merit, There is a broad liberality of tone throughout which will recommend them to 
thinking, mquiring Americans, Whether, as is asserted, he has established a new sya- 
tem of philosophy, and if so, whether that system is better than all other systems, {a 
yet to be decided; but that his bold and vigorous thought will add something valuable 
end permanent to human knowledge is undeniable."— Utica Herald. 
“Herbort Spencer is the foremost among living thinkers, If leas erudite thar 
Hamilton, he is quite as original, and is more comprehensive and catholic than Maz 
tel," — Universalish 
