The Concepts and Theories 

 OF Modern Physics. 



By J. B. STALLO. 



12mo, cloth $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, and 

 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 acutcness 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." — Seio York ISun. 



" 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 hLs vouthtid years. His present book must be 

 road 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 I'op- 

 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 mterested in the accuracy 

 more than the proi^ress of scientific thought. It deals with the results and 

 theories of physical science, and in no sense with the processes of the labf>- 

 ratory. It is written with a clearness that is uncommon in philosopliic 

 works and with a desire to find truth, conscious of the fact that a prime 

 prerequisite of finding it is to 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." — iVie^tf York World. 



" The volume is an important contribution to scientific discussion, arid 

 is marked by closeness of reasoning, and clearness and cogency of state- 

 ment." — Boston Journal. 



For 6-j.U by all booksellers; or sent by mail, post paid, on receipt of price. 



New York: D. APPLETO.N & CO., 1, 3, & 6 Bond St. 



