D. APPLETON d> CO.'S PUBLICATION'S. 



THE 



Correlation and Conservation of Forces. 



WITH AN 



HTEODUCTION iND BRIEF BIOGRAPHICAL NOTIOtt 

 By EDWARD L. YOUMANS, M.D. 12rao, 490 pages. 



CONTENTS 

 L By W. R. Grove. The Correlation of Physical Forces. 

 II. By Prof. Helmholtz. The Interaction of Natural Forces. 



III. By J. R. Mayer. 1. Remarks on the Forces of Inorganic Nature. 



2. On Celestial Dynamics. 



3. On the Mechanical Equivalent of Heat. 



IV. By Dr. Faraday. Some Thoughts on the Conservation of Forces. 

 V. By Prof. Liebig. The Connection and Equivalence of Forces. 



VI. By Dr. Carpenter. The Correlation of the Physical and Vital Forces 



" This work is a very welcome addition to our scientific literature, and will b« 

 particularly acceptable to those who wish to obtain a popular, but at the same time 

 precise and clear view of what Faraday justly calls the highest law in physical science, 

 the principle of the conservation of force. Sufficient attention has not been paid to the 

 publication of collected monographs or memoirs upon special subjects. Dr. YoumanB' 

 work exhibits the value of such collections in a very striking mannet, and we earnestly 

 hope his excellent example may be followed in other branches of science." — American 

 Journal of Science. 



"It was a happy thought which suggested the publication of this volume. The 

 question is often asked, and not so easily answered, What are the new doctrines of tht 

 Correlation and Conservation of Forces? In this volume we have the answer, and 

 with the reasons of its chief expounders; those who are ignorant on that theme, can 

 thus question the original authorities." — New Englander. 



" We here have the original expositions of the new Philosophy of Forces, accompa- 

 nied by an excellent exposition of both the expositons and the expositors; the whole 

 will be a rare treat to the lovers of advancing scientific thought." — Methodist 

 Quarterly Review. 



"This is, pei haps, the most remarkable book of the age. We have hero the lateel 

 discoveries, and the highest results of thought concerning the nature, laws, nnd con 

 &.«tions of the forces of the universe. No higher or more sublime problem can (ngagfl 

 fcho intellect of man than is discussed by these doctors of science intent alone on ani? 

 teuf it the truth." — Detroit Free Press. 



'"Hiis work presents a praiseworthy specimen of complete and faithful authorship 

 tr.d IU prblication at this time will form an epoch in th* experience of many think icg 

 a&«nd»."— ibun: 



