SCIENTIFIC PUBLICATIONS. 

 Man before Metals. 



By N. Jolt, Professor at the Science Faculty of Toulouse ; Correspondent 

 of the Institute. With 148 Illustrations. Timo. Cloth, $1.15. 



"The discnssion of man's origin and early history, by Professor De Quatrefages, formed one 

 of the most useful volumes in the ' International Scientific Series,' and the same collection 

 is now further enriched by a popular treatise on paleontology, by M. N. Joly, Professor in the 

 University of Toulouse. The title of the book, ' Man before Metals,' indicates the limitations of 

 the writer's theme. His object is to bring together the numerous proofs, collected by modern 

 resear3h, of the iireat .ige of the human race, and to show us what man was. in respect of cus- 

 toms, industries, and moral or religious ideas, before the use of metals was known to him.'' — 

 New Yo?'k iSun. 



" An interesting, not to say fascinating volume."— A'^«i/; York Churchman. 



" M. Joly's book sums up the discoveries of modern science bearing on the primeval history 

 of man, on the antiquity of the human r.ace, and on the circumstances attending its slow and 

 partial ascent to the modern level of civilization. It also presents with brevity but thoroughness 

 the generally accepted theories relating to the habits and environment of primitive man. Its 

 usefulness and interest are much increased by numerous and excellent illustrations." — Philadel- 

 phia North American. 



" This is a book worth owning."— iVew York Christian Advocate. 



Animal Intelligence. 



By George J. Romanes, F. R. S., Zoological Secretary of the Liunaean 

 Society, etc. 12ino. Cloth, $1.75. 



" My object in the work as a whole is twofold : First, I have thought it desirable that there 

 should be something resembhng a text-book of the facts of Comparative Psychology, to which 

 men of science, and also metaphysicians, may turn whenever they have occasion to acquaint 

 themselves with the particular level of intelligence to which this or that species of animal 

 attains. My second and much more important object is that of considering the facts of animal 

 intelligence in their relation to the theory of descent."— i^'rom the Preface. 



" Unless we are greatly mistaken, Mr. Rom.anes's work will take its place as one of the most 

 attractive volumes of the ' International Scientific Series.' Some persons may, indeed, be dis- 

 posed tos.ay that it is too attractive, that it feeds the popular taste for the curious and marvelous 

 without supplying any commensurate discipline in exact scientific reflection: but the author has, 

 we think, fully justified himself in his modest preface. The result is the appearance of a collec- 

 tion of facts which will be a real boon to the student of Comparative Psychology, for this is the 

 first attempt to present systematically well-assured observations on the mental life of animals. 

 —Saturday/ Revieiv. 



" The author believes himself, not without ample cause, to have completely bridged the sup- 

 posed gap between instinct and reason by the authentic proofs here marshaled of remarkable 

 intelligence in some of the higher animals. It is the seemingly conclusive evidence of reasoning 

 powers furnished by the adaptation of means to ends in cases which can not be explained on the 

 theory of inherited aptitude or habit." — New York Sun. 



The Science of Politics. 



By Sheldon Amos, M. A., author of " The Science of Law," etc. 12mo. 

 Cloth, $1.75. 



" It is an able and exhaustive treatise, within a reasonable compass. Some of its conclusions 

 will be disputed, although sterling common sense is a characteristic of the book. To the 

 political student and the practical statesman it ought to be of great value." — New York Herald. 



" The author traces the subject from Plato and Aristotle in Greece, and Cicero m Rome, to 

 the modern schools in the English field, not slighting the teachings of the American Revolution 

 or the lessons of the French Revolution of 1793. Forms of government, poUtical terms, the 

 relation of law, written and unwritten, to the sultjoct, a codification from Justinian to Napoleon 

 in France and Field in America, are treated as parts of the subject in hand. Necessarily the 

 subjects of executive and legislative authority, police, liquor, and land laws are considered, and 

 the question ever grovring in importance in all countries, the relations of corporations to the 

 state." — New York Observer. 



New York : D. APPLETON & CO., 1, 3, & 5 Bond Street. 



