THE CONCEPTS AND [THEORIES 
OF MODERN PHYSICS. 
By J. B. STALLO. 
12mo, cloth . : : 5 - $1.75. 
** Judge Stallo’s work is an inquiry into the validity of those mechanical 
conceptions of the universe which are now held as fundamental in physical 
science. He takes up the leading modern ductrines which are based upon 
this mechanical conception, such as the atomic constitution of matter, the 
kinetic theory of gases, the conservation of energy, the nebular hypothesis 
and other views, to find how much stands upon solid empirical ground, an 
how much rests upon metaphysical speculation. Since the appearance of 
Dr. Draper’s ‘ Religion and Science,’ no book has been published in the 
country calculated to make so deep an impression on thoughtful and edu- 
cated readers as this volume. . . . The range and minuteness of the au- 
thor’s learning, the acuteness of his reasoning, and the singular precision 
and clearness of his style, are qualities which very seldom have been jointly 
exhibited in a scientific treatise.”—ew York Sun. 
“* Judge J. B. Stallo, of Cincinnati, is a German by birth, and came to 
this country at about the age of seventeen. He was early familiar with 
science, and he lectured for some years in an Eastern college; but at length 
he adopted the profession of law. He is also remembered by many as an 
author, having a number of years ago written a metaphysical treatise of 
marked ability for one of his youthful years. His present book must be 
read deliberately, must be studied to be appreciated; but the students of 
science, as well as those of metaphysics, are certain to be deeply interested 
in its logical developments. It is a timely and telling contribution to the 
philosophy of science, imperatively called for by the present exigencies in 
the progress of knowledge. It is to be commended equally for the solid 
value of its contents and the scholarly finish of its execution.”—The Pop- 
ular Science Monthly. 
** The book is of vital interest to a much larger class than specialists— 
to all, in fact, who value clear thinking or are interested in the accuracy 
more than the progress of scientific thought. It deals with the results and 
theories of physical science, and in no sense with the processes of the labo- 
ratory. It is written with a clearness that is uncommon in philosophic 
works and with a desire to find truth, conscious of the fact that a prime 
prerequisite of finding it isto clear the way of accumulated and fast-settling 
untruths. It is a scientific rebuke, as severe as it is lucid, of the scientists 
who leave their apparatus and go star-gazing: here is the pit into which 
they have fallen.”—Wew York World. 
“The volume is an important contribution to scientific discussion, and 
is marked by closeness of reasoning, and clearness and cogency of state- 
ment.’’—Boston Journal. 
For s le by all booksellers; or sent by mail, post paid, on receip: of price. 
New York: D. APPLETON & CO., 1, 3, & 5 Bond St. 
