opinions of the Press on the International Scieittific Series, 



VI. 



The New Chemistry. 



By JOSIAH P, COOKE, Jr., 



Erving Professor of Chemistry and Mineralogy in Harvard University. 



I vol., i2mo. Cloth Price, $2.00. 



The book of Prof. Cooke is a model of the modern popular science work. It has 

 just the due proportion of fact, philosophy, and true romance, to make it a fascinating 

 companion, either for the voyage or the study." — Daily Graphic, 



*' This admirable monograph, by the distinguished Erving Professor of Chemistry 

 in Harvard University, is the first American contribution to 'The International Scien- 

 tific Series,' and a more attractive piece of work in the way of popular exposition upon 

 a difficult subject has not appeared in a long time. It not only well sustains the char- 

 acter of the volumes with which it is associated, but its reproduction in European coun- 

 tries will be an honor to American science. It is, moreover, in an eminent degree, 

 timely, for, between the abandonment of its old views and the bewilderment caused 

 by the new, chemical science was getting into a demoralized condition. A work was 

 greatly needed that should relieve the discomfort of transition, and bridge over the 

 gulf between the old order of ideas and those which are to succeed them. Professor 

 Cooke's compendious contribution to the present exigencies of chemical literature will 

 give the students of the science exactly the help they need, and pass them over by an 

 easy and pleasant route into the new realm of chemical philosophy." — New York 

 Tribune. 



" All the chemists in the country will enjoy its perusal, and many will seize upon it 

 as a thing longed for. For, to those advanced students who have kept well abreast of 

 the chemical tide, it offers a calm philosophy. To those others, youngest of the class, 

 who have emerged from the schools since new methods have prevailed, it presents a 

 generalization, drawing to its use all the data, the relations of which the newly-fledged 

 fact-seeker may but dimly perceive without its aid. ... To the old chemists, Prof. 

 Cooke's treatise is like a message from beyond the mountain. They have heard of 

 changes in the science; the clash of the battle of old and new theories has stirred them 

 from afar. The tidings, too, had come that the old had given way ; and little more than 

 this they knew. . . . Prof Cooke's '' New Chemistry ' must do wide service in bringmg 

 to close sight the little known and the longed for. ... As a philosophy it is elemen- 

 tary, but, as a book of science, ordinary readers will find it sufficiently advanced." — 

 Utica Morning Herald. 



"A book of much higher rank than most publications of its class. It treats only 

 of modern chemical theories — relating to molecules, combining proportions, reactions, 

 atomic weights, isomerism, and the synthesis of organic compounds — taking one into 

 the very arcana of chemical mysteries. Though there are no more recondite branches 

 of the science than those here explained and illustrated, such is Professor Cooke's 

 clearness that he may be said to make every thing plain to the average reader, who 

 will but take pains with his lessons. Professor Cooke reminds us, in his simplicity and 

 lucidity of statement, of Professor Tyndall, than which there can be no higher praise." 

 — New York Journal 0/ Commerce. 



*'The aim of the work is to furnish a hand-book of a symmetrical science, resting 

 fundamentally upon the law of Avogadro that 'equal volumes of all substances, when 

 in the state of gas and under like conditions, contain the same number of molecules.* 

 Jt is to a rigid adherence to this law and the deductions which flow from it that chem- 

 istry, as now taught, owes the marked difference which separates it from the chemistry 

 taught a few years ago. The original lectures of Professor Cooke, enlarged and 

 somewhat modified, present in their present form a clear and full exposition of the sci- 

 ence, and will form a useful text-book as well as a volume of unusual interest to the 

 lovers of physical science." — New York World. 



D. APPLETON & CO., Publishers, 549 & 551 Broadway, N. Y. 



