D. APPLETON & CO.'S PUBLICATIONS, 



Professor E. L. YOUMANS'S WORKS. 



THE HANDBOOK OF HOUSEHOLD SCIENCE. A 



Popular Acoouiit of Ileat, Light, Air, Aliment, and Cleansing, in 

 their Scientific Principles and Domestic Applications. Illustrated. 

 12mo. Cloth, $1.75. 



" A desire to prepare a better statement than has hitherto been offered of the 

 bearings of science upon the economy of the household, has led to this work. The 

 purpose has been to condense within the limits of a convenient manual the largest 

 possible amount of interesting and valuable scientific information of those agents, 

 materials, and operations in which we have a concern, chiefly as dwellers in 

 houses." From the Preface. 



THE CULTURE DEMANDED BY MODERN LIFE. 



A Series of Addresses and Arguments on the Claims of Scientific 

 Education. Edited, with an Introduction on Mental Discipline in 

 Education, by EDWARD L. YOCMAXS, 31. D. 12mo. Cloth, $2.00. 



" A debt of gratitude is doe to Dr. Youmans for this very interesting and in- 

 structive volume. It meets a serious want in the popular literature of our time. 

 We hive for some time sorely needed a book hi which the fubject of education 

 should be philosophically discussed. We have needed a book in which the claims 

 which divers branches of study rightfully have upon our attention should be fairly 

 and lucidly set forth. In the present volume the claims of scientific studies a 

 very important item in education are ably, not to say powerfully, presented. 

 The idea of collecting the opinions of various great writers, each an authority 

 in his own province, upon this most weighty subject, was a happy one. . . . We 

 need do no more in behalf of the claims of science than refer to Dr. Yonmans's 

 book, where nearly all that can be urged on the subject is most forcibly urged." 



CORRELATION AND CONSERVATION OF FORCES. 



A Series of Expositions by Scientific Men. Edited, with an Intro- 

 duction and Brief Biographical Notices of the Chief Promoters of 

 the New Views, by EDWARD L. YOCMAXS, M. D. 12mo. Cloth, 

 $2.00. 



CONTENTS. I. By Professor W. E. GROVE : The Correlation of Phys- 

 ical Forces. II. By Professor HBLMHOLTZ : The Interaction of Natural 

 Forces. III. By Dr. J. R. MAYEB: 1, The Forces of Inorganic Nature; 

 2. Celestial Dynamics ; 3, The Mechanical Equivalent of Ileat. IV. By 

 Dr. FARADAY: The Conservation' of Forces. V. By Professor LIEBIG: 

 The Connection and Equivalence of Forces. VL By Dr. CARPEXTER : 

 The Correlation ot the Physical and Vital Forces. 



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

 be 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. Youmans's work exhibits the value of such collections in a 

 very striking manner, and we earnestly hope his excellent example may be fol- 

 lowed in other branches of science." American Journal of Science. 



New York : D. APPLETON & CO., 72 Fifth Avent 



