D. APPLETON & CO.'S PUBLICATIONS, 



THE BRAIN AND ITS FUNCTIONS. By J. LUTS, Physician 

 to the Hospice dc la Salpetriere. With Illustrations. 12mo. 

 Cloth, $1.50. 



"No living physiologist is better entitled to speak with authority upon the 

 structure and functions of the brain than Dr. Luys. His studies on the anatomy 

 of the nervous system are acknowledged to be the fullest and most systematic 

 ever undertaken. Dr. Luys supports his conclusions not only by his own ana- 

 tomical researches, but also by many functional observations of various other 

 physiologists, including of course Frofessor Ferrier'a now classical experi- 

 ments."/^. James's Gazette. 



"Dr. Luya, at the head of the great French Insane Asylum, is one of the most 

 eminent and successful investigators of cerebral science now living ; and he has 

 given unquestionably the clearest and most interesting brief account yet made 

 of the structure and operations of the brain. We have been fascinated by this 

 volume more than by any other treatise we have yet seen on the machinery of 

 sensibility and thought; and we have been instructed not only by much that is 

 new, but by many sagacious practical hints such as it is well fo'r everybody to 

 understand.'' The Popular Science Monthly. 



THE CONCEPTS AND THEORIES OF MODERN 

 PHYSICS. By J. B. STALLO. 12mo. Cloth, $1.76. 



"Judge Stallo's work is an inquiry into the validity of those mechanical con- 

 ceptions of the universe which are now held as fundamental in physical science. 

 He takes up the leading modern doctrines 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 metaphys- 

 ical 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 im- 

 pression on thoughtful and educated readers as this volume. . . . The range 

 and minuteness of the author's learning, the acnteness 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." New York Sun. 



THE FORMATION OF VEGETABLE MOULD, through 

 the Action of Worms, with Observations on their 

 Habits. By CHARLES DARWIN, LL. D., F. R. S., author of " On 

 the Origin of Species," etc., etc. With Illustrations. 12mo. 

 Cloth, $1.50. 



" Mr. Darwin's little volume on the habits and instincts of earth-worms is no 

 less marked than the earlier or more elaborate efforts of his genius by freshness 

 of observation, unfailing power of interpreting and correlating facts, and logical 

 vigor in generalizing upon them. The main purpose of the work is to point out 

 the share which worms have taken in the formation of the layer of vegetable 

 mould which covers the whole surface of the land in every moderately humid 

 country. All lovers of nature will unite in thanking Mr. Darwin for the new and 

 interesting light he has thrown upon a subject so long overlooked, yet so full of 

 interest and instruction, as the structure and the labors of the earth-worm." 

 Saturday Review. 



"Respecting worms as among the most useful portions of animate nature, 

 Dr. Darwin relates, in this remarkable book, their structure aud habits, the 

 part they have played in the burial of ancient buildings and the denudation of 

 the land, in the disintegration of rock*, the preparation of soil for the growth 

 f plants, and in the natural history of the world." Boston Advertiser. 



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



